birchfield north dakota argued april decided june fight serious harms inflicted drunk drivers laws prohibit motorists driving blood alcohol concentration bac exceeding specified level bac typically determined direct analysis blood sample using machine measure amount alcohol person breath help secure drivers cooperation testing also enacted implied consent laws require drivers submit bac tests originally penalty refusing test suspension motorist license time however toughened laws imposing harsher penalties recidivists drivers particularly high bac levels motorists fear increased punishments strong incentives reject testing including north dakota minnesota make crime refuse undergo testing cases three petitioners arrested charges state trooper arrested petitioner danny birchfield advised obligation north dakota law undergo bac testing told state law requires refusing submit blood test lead criminal punishment birchfield refused let blood drawn charged misdemeanor violation refusal statute entered conditional guilty plea argued fourth amendment prohibited criminalizing refusal submit test state district rejected argument state affirmed arresting petitioner william robert bernard minnesota police transported station officers read minnesota implied consent advisory like north dakota informs motorists crime refuse submit bac test bernard refused take breath test charged test refusal first degree minnesota district dismissed charges concluding warrantless breath test permitted fourth amendment state appeals reversed state affirmed officer arrested petitioner steve michael beylund took nearby hospital officer read north dakota implied consent advisory informing test refusal circumstances crime beylund agreed blood drawn test revealed bac level three times legal limit beylund license suspended two years administrative hearing appeal state district rejected argument consent blood test coerced officer warning state affirmed held fourth amendment permits warrantless breath tests incident arrests drunk driving warrantless blood tests pp taking blood sample administering breath test search governed fourth amendment see skinner railway labor executives schmerber california searches may nevertheless exempt warrant requirement fall within relevant exception searches conducted incident lawful arrest exception applies categorically rather basis missouri mcneely pp doctrine ancient pedigree predates nation founding historical evidence suggests fourth amendment altered permissible bounds arrestee searches mere fact lawful arrest justifies full search person robinson doctrine may also apply situations envisioned fourth amendment adopted riley california considered apply doctrine searches arrestee cell phone founding era guidance lacking determined whether exempt search warrant requirement assessing one hand degree intrudes upon individual privacy degree needed promotion legitimate governmental interests mode analysis proper founding era provides definitive guidance whether blood breath tests allowed incident arrest pp analysis begins considering impact breath blood tests individual privacy interests pp breath tests implicat significant privacy concerns skinner physical intrusion almost negligible tests require piercing skin entail minimum inconvenience requiring arrestee insert machine mouthpiece mouth exhale deep lung air intrusive collecting dna sample rubbing swab inside person cheek maryland king scraping underneath suspect fingernails cupp murphy breath tests unlike dna samples also yield bac reading leave biological sample government possession finally participation breath test likely enhance embarrassment inherent arrest pp said blood tests require piercing skin extract part subject body skinner supra thus significantly intrusive blowing tube blood test also gives law enforcement sample preserved possible extract information beyond simple bac reading prospect cause anxiety person tested pp analysis next turns asserted need obtain bac readings pp federal government paramount interest preserving public highway safety mackey montrym compelling interest creating deterrent drunken driving leading cause traffic fatalities injuries sanctions refusing take bac test increased consequences like license suspension longer adequate persuade dangerous offenders agree test lead severe criminal sanctions making crime refuse submit bac test laws issue provide incentive cooperate thus serve important function pp ways combat drunk driving decisions establish arresting officer obligated obtain warrant conducting search incident arrest simply might adequate time particular circumstances obtain warrant legality search incident arrest must judged basis categorical rules see robinson supra mcneely supra distinguished imposition warrant requirement every bac test likely swamp courts given enormous number arrests little corresponding benefit alternatives sobriety checkpoints ignition interlock systems poor substitutes pp bernard argues warrantless bac testing justified search incident arrest doctrine aims prevent arrestee destroying evidence loss blood alcohol evidence results body metabolism alcohol natural process controlled arrestee instances however state justifiably concerned evidence may lost state general interest evidence preservation avoiding loss evidence riley supra readily encompasses metabolization alcohol blood bernard view finds support chimel california schmerber mcneely supra pp impact breath tests privacy slight need bac testing great fourth amendment permits warrantless breath tests incident arrests drunk driving blood tests however significantly intrusive reasonableness must judged light availability less invasive alternative breath test respondents offered satisfactory justification demanding intrusive alternative without warrant instances blood tests might preferable substances alcohol impair driver ability operate car safely subject unconscious nothing prevents police seeking warrant relying exigent circumstances exception applies breath tests significantly less intrusive blood tests cases amply serve law enforcement interests breath test blood test may administered search incident lawful arrest drunk driving warrant needed situation pp motorists may criminally punished refusing submit blood test based legally implied consent submit one thing approve laws impose civil penalties evidentiary consequences motorists refuse comply quite another state insist upon intrusive blood test impose criminal penalties refusal submit must limit consequences motorists may deemed consented virtue decision drive public roads pp legal conclusions resolve three present cases birchfield criminally prosecuted refusing warrantless blood draw therefore search refused justified search incident arrest basis implied consent appears basis warrantless test birchfield blood threatened unlawful search unlawfully convicted refusing search bernard criminally prosecuted refusing warrantless breath test test permissible search incident arrest drunk driving fourth amendment require officers obtain warrant prior demanding test bernard right refuse beylund submitted blood test police told law required submission north dakota based conclusion beylund consent voluntary erroneous assumption state compel blood tests reevaluate beylund consent light partial inaccuracy officer advisory pp nd reversed remanded affirmed nd vacated remanded alito delivered opinion roberts kennedy breyer kagan joined sotomayor filed opinion concurring part dissenting part ginsburg joined thomas filed opinion concurring judgment part dissenting part opinion notice opinion subject formal revision publication preliminary print reports readers requested notify reporter decisions washington typographical formal errors order corrections may made preliminary print goes press nos writ certiorari north dakota writ certiorari minnesota writ certiorari north dakota june justice alito delivered opinion drunk drivers take grisly toll nation roads claiming thousands lives injuring many victims inflicting billions dollars property damage every year fight problem laws prohibit motorists driving blood alcohol concentration bac exceeds specified level determining whether driver bac legal limit requires test many drivers stopped suspicion drunk driving submit testing given option every state also long termed implied consent laws laws impose penalties motorists refuse undergo testing sufficient reason believe violating state laws past typical penalty noncompliance suspension revocation motorist license cases us involve laws go beyond make crime motorist refuse tested lawfully arrested driving impaired question presented whether laws violate fourth amendment prohibition unreasonable searches problem drunk driving arose almost soon motor vehicles came use see jacobs drunk driving american dilemma jacobs new jersey enacted perhaps nation first law laws pp soon followed early laws made illegal drive intoxicated provide statistical definition intoxication result prosecutors normally present testimony defendant showing outward signs intoxication like imbalance slurred speech donigan chemical tests law donigan one early case put effects resulting drinking intoxicating liquors manifested various ways one shown influence intoxicating liquor necessary witness prove one effects perceptible state noble saw continued rise number motor vehicles roads end prohibition coincidentally increased interest combating growing problem drunk driving jones measuring alcohol blood breath forensic purposes historical review sci rev jones american medical association national safety council set committees study problem ultimately concluded driver bac higher presumed inebriated donigan indiana enacted first law defined presumptive intoxication based bac levels using recommended standard ind acts jones soon followed response updated guidance national organizations lowered presumption bac level donigan later moved away mere presumptions defendants might rebut adopted laws providing driving bac higher per se illegal jacobs enforcement laws type obviously requires measurement bac one way analyze sample driver blood directly technician medical training uses syringe draw blood sample veins subject must remain still procedure sample shipped separate laboratory measurement alcohol concentration see erwin defense drunk driving cases ed erwin although possible subject forcibly immobilized sample may drawn many prohibit drawing blood driver resists since practice helps avoid violent confrontations south dakota neville common economical method calculating bac means machine measures amount alcohol person breath national highway traffic safety admin nhtsa haire leaf preusser solomon use warrants reduce breath test refusals experiences north carolina apr one device called drunkometer invented first sold note rev test subject inflate small balloon test analyst release captured breath machine forced chemical solution reacted presence alcohol changing color test analyst observe amount breath required produce color change calculate subject breath alcohol concentration extension bac figure practical machine called breathalyzer came common use beginning relying basic scientific principles erwin jones time improved breath test machines developed today devices detect presence alcohol quickly accurately typically using infrared technology rather chemical reaction erwin jones practice breath testing machines used evidentiary purposes must approved national highway traffic safety administration see cohen green apprehending prosecuting drunk driver lexisnexis machines generally regarded reliable federal standards require devices produce accurate reproducible test results variety bac levels low high fed reg erwin jones see also california trombetta measurement bac based breath test requires cooperation person tested subject must take deep breath exhale mouthpiece connects machine berger work alcohol breath testing british medical berger typically test subject must blow air device period several produce adequate breath sample process sometimes repeated analysts compare multiple samples ensure device accuracy trombetta supra see also erwin describing intoxilyzer device requiring exhalation although subject may take new breath halfway modern breath test machines designed capture deep lung alveolar air trombetta supra air alveolar region lungs provides best basis determining test subject bac part lungs alcohol vapor gases exchanged blood breath erwin standard infrared device used whole process takes minutes start finish berger erwin evidentiary breath tests occur next vehicle side road police station controlled environment especially conducive reliable testing cases officer patrol vehicle special mobile testing facilities nhtsa berning et refusal intoxication testing report congress cooperation test subject necessary breath test administered highly preferable blood sample taken enactment laws defining intoxication based bac made necessary find way securing implied consent laws enacted achieve result provided cooperation bac testing condition privilege driving state roads privilege rescinded suspected drunk driver refused honor condition donigan first law enacted new york many followed suit long thereafter uniform vehicle code also included provision today adopted implied consent laws require motorists condition operating motor vehicle within state consent bac testing arrested otherwise detained suspicion offense missouri mcneely plurality opinion slip suspension revocation motorist driver license remains standard legal consequence refusal addition evidence motorist refusal admitted evidence likely intoxication prosecution see ibid recent decades federal government toughened laws efforts corresponded dramatic decrease fatalities early number annual fatalities averaged recent year statistics available number fallen presidential commission drunk driving nhtsa traffic safety facts data driving nhtsa driving one legal change lowering bac standard see erwin addition many impose increased penalties recidivists drivers bac level exceeds higher threshold north dakota example standard penalty offenders license suspension fine cent code ann supp offender bac higher must spend least two days jail addition state imposes increased mandatory minimum sentences recidivists many taken similar approach new structure threatened undermine effectiveness implied consent laws penalty driving greatly elevated bac repeat violations exceeds penalty refusing submit testing motorists fear conviction severely punished offenses incentive reject testing refusal rate high average drivers asked submit bac testing refused nhtsa namuswe coleman berning breath test refusal rates update mar north dakota refusal rate representative minnesota average ibid combat problem test refusal begun enact laws making crime refuse undergo testing minnesota taken approach decades see laws laws may partly explain refusal rate national average minnesota rate also half rate reported year first criminal refusal law took effect see ross simon cleary lewis storkamp causes consequences implied consent refusal alcohol drugs driving north dakota adopted similar law pair accidents claimed lives entire young family another family laws pp codified federal government also encourages approach means overcoming incentive drunk drivers refuse test nhtsa refusal intoxication testing ii petitioner danny birchfield accidentally drove car north dakota highway october state trooper arrived watched birchfield unsuccessfully tried drive back ditch car stuck trooper approached caught strong whiff alcohol saw birchfield eyes bloodshot watery birchfield spoke slurred speech struggled stay steady feet trooper request birchfield agreed take several field sobriety tests performed poorly trouble reciting sections alphabet counting backwards compliance trooper directions believing birchfield intoxicated trooper informed obligation state law agree bac test birchfield consented roadside breath test device used sort test often differs machines used breath tests administered police station intended provide preliminary assessment driver bac see berger reliability preliminary screening breath tests varies many jurisdictions permit numerical results admitted trial evidence driver bac see generally erwin north dakota results type test used determining whether test shall given cent code ann birchfield case screening test estimated bac three times legal limit see state trooper arrested birchfield driving impaired gave usual miranda warnings advised obligation north dakota law undergo bac testing informed state law requires see refusing take test expose criminal penalties addition mandatory addiction treatment sentences range mandatory fine offenders fines least imprisonment least one year one day serial offenders criminal penalties apply blood breath urine test refusals alike see although faced prospect prosecution law birchfield refused let blood drawn three months birchfield received citation driving influence ultimately pleaded guilty offense state birchfield crim dist morton time also pleaded guilty misdemeanor violation refusal statute plea conditional one birchfield admitted refusing blood test argued fourth amendment prohibited criminalizing refusal submit test state district rejected argument imposed sentence accounted prior conviction cf sentence included days jail suspended already served year unsupervised probation fine fees mandatory participation sobriety program substance abuse evaluation app pet cert appeal north dakota affirmed nd found support test refusal statute mcneely plurality opinion spoken favorably acceptable tools consequences refusing submit testing quoting mcneely slip august minnesota police received report problem south paul boat launch three apparently intoxicated men gotten truck stuck river attempting pull boat water police arrived witnesses informed man underwear driving truck man proved william robert bernard petitioner second cases bernard admitted drinking denied driving truck though holding keys refused perform field sobriety tests noting bernard breath smelled alcohol eyes bloodshot watery officers arrested bernard driving impaired back police station officers read bernard minnesota implied consent advisory like north dakota informs motorists crime state law refuse submit legally required bac test see stat subd aside noncriminal penalties like license revocation subd test refusal minnesota result criminal penalties ranging days imprisonment fine misdemeanor violation seven years imprisonment fine repeat offenders subd subds subd subd officers asked bernard take breath test refused prosecutors charged test refusal first degree four prior convictions case refusal carries highest maximum penalties mandatory minimum prison sentence subd minnesota district dismissed charges ground warrantless breath test demanded bernard permitted fourth amendment app pet cert pp minnesota appeals reversed state affirmed judgment based longstanding doctrine authorizes warrantless searches incident lawful arrest high concluded police need warrant insist test bernard breath two justices dissented opinion page stras police officer spotted third petitioner steve michael beylund driving streets bowman north dakota night august officer saw beylund try unsuccessfully turn driveway process beylund car nearly hit stop sign coming stop still partly public road officer walked car saw beylund empty wine glass center console next noticing beylund also smelled alcohol officer asked step car beylund struggled keep balance officer arrested beylund driving impaired took nearby hospital read beylund north dakota implied consent advisory informing test refusal circumstances crime see cent code ann unlike two petitioners cases beylund agreed blood drawn analyzed nurse took blood sample revealed blood alcohol concentration three times legal limit given test results beylund driver license suspended two years administrative hearing beylund appealed hearing officer decision north dakota district principally arguing consent blood test coerced officer warning refusing consent crime district rejected argument beylund appealed north dakota affirmed response beylund argument consent insufficiently voluntary announced criminal penalties refusal relied fact birchfield decision upheld constitutionality penalties nd also explained found consent offered similarly situated motorist voluntary state smith nd case emphasized north dakota implied consent advisory misleading truthfully related penalties refusal granted certiorari three cases consolidated argument see order decide whether motorists lawfully arrested drunk driving may convicted crime otherwise penalized refusing take warrantless test measuring alcohol bloodstream iii summary facts proceedings three cases reveals cases differ respects petitioners birchfield beylund told obligated submit blood test whereas petitioner bernard informed breath test required birchfield bernard refused undergo test convicted crime refusal beylund complied demand blood sample license suspended administrative proceeding based test results revealed high blood alcohol level despite differences success three petitioners depends proposition criminal law ordinarily may compel motorist submit taking blood sample breath test unless warrant authorizing testing issued magistrate hand warrantless searches comport fourth amendment follows state may criminalize refusal comply demand submit required testing state may make crime person obstruct execution valid search warrant see stat stat stat ann west cf bumper north carolina law enforcement officer claims authority search home warrant announces effect occupant right resist search token warrantless searches constitutional obstacle federal law admission results yield either criminal prosecution civil administrative proceeding therefore begin considering whether searches demanded cases consistent fourth amendment iv fourth amendment provides right people secure persons houses papers effects unreasonable searches seizures shall violated warrants shall issue upon probable cause supported oath affirmation particularly describing place searched persons things seized amendment thus prohibits unreasonable searches cases establish taking blood sample administration breath test search see skinner railway labor executives schmerber california question whether warrantless searches issue reasonable see vernonia school dist acton text fourth amendment indicates ultimate measure constitutionality governmental search text fourth amendment specify search warrant must obtained kentucky king see also california acevedo scalia concurring judgment text explicitly regarding warrants way limitation upon issuance rather requirement use inferred warrant must usually secured king usual requirement however subject number exceptions ibid previously occasion examine whether one exception exigent circumstances applies investigations exigent circumstances exception allows warrantless search emergency leaves police insufficient time seek warrant michigan tyler permits instance warrantless entry private property need provide urgent aid inside police hot pursuit fleeing suspect police fear imminent destruction evidence king supra schmerber california held drunk driving may present exigency officer directed hospital personnel take blood sample driver receiving treatment car crash injuries concluded officer might reasonably believed confronted emergency left time seek warrant percentage alcohol blood begins diminish shortly drinking stops specific facts case time already lost taking driver hospital investigating accident found fourth amendment violation even though warrantless blood draw took place driver objection recently though held natural dissipation alcohol bloodstream always constitute exigency justifying warrantless taking blood sample holding missouri mcneely state missouri seeking per se rule whenever officer probable cause believe individual driving influence alcohol exigent circumstances necessarily exist bac evidence inherently evanescent opinion slip disagreed emphasizing schmerber adopted analysis depending facts circumstances particular case slip refused depart careful assessment exigency adopt categorical rule proposed state slip emphasizing exception must applied basis mcneely noted exceptions warrant requirement apply categorically rather fashion slip one mcneely opinion recognized rule warrantless search may conducted incident lawful arrest see ibid pointedly address potential justification warrantless testing suspects except exception issue th case namely exception exigent circumstances slip neither justices wrote separately see kennedy concurring part slip roberts concurring part dissenting part slip thomas dissenting slip three cases us drivers searched told required submit search placed arrest drunk driving therefore consider doctrine applies breath blood tests incident arrests doctrine ancient pedigree well nation founding recognized officers carrying lawful arrest authority make warrantless search arrestee person manual justices peace provides representative picture usual practice shortly fourth amendment adoption thorough search felon utmost consequence safety benefit public means deprived instruments mischief evidence may probably found sufficient convict either time opportunity allowed besure sic find means get rid conductor generalis parker ed reprinting welch observations office constable one fourth amendment historian observed prior american independence nyone arrested expect surface clothing body luggage saddlebags searched perhaps shoes socks mouth well cuddihy fourth amendment origins original meaning historical evidence suggests fourth amendment altered permissible bounds arrestee searches contrary legal scholars agree legitimacy body searches adjunct arrest process thoroughly established colonial times much constitutionality doubted see also taylor two studies constitutional interpretation stuntz substantive origins criminal procedure yale reported cases addressed legality searches century apparently point much contested century subject came discussion often decisions treatises alike confirmed searches broad acceptance holker hennessey mo ex parte hurn thatcher weeks reifsnyder lee iowa wharton criminal pleading practice ed bishop criminal procedure ed first addressed question confirmed albeit dicta right part government always recognized english american law search person accused legally arrested discover seize fruits evidence crime weeks exception quickly became fixture fourth amendment case law decades followed grappled repeatedly question authority arresting officers search area surrounding arrestee decisions reached results easy reconcile see lefkowitz forbidding unrestrained search room arrest made harris permitting complete search arrestee apartment rabinowitz permitting complete search arrestee office attempted clarify law regarding searches incident arrest chimel california case officers searched arrestee entire house chimel endorsed general rule arresting officers order prevent arrestee obtaining weapon destroying evidence search person arrested area immediate control comparable justification said supported routinely searching room arrest occurs matter searching desk drawers closed concealed areas room ibid four years later robinson elaborated chimel meaning noted rule actually comprises two distinct propositions first search may made person arrestee virtue lawful arrest second search may made area within control arrestee thorough review relevant common law history repudiated adjudication question whether arresting officer authority carry search arrestee person permissibility searches held depend whether search particular arrestee likely protect officer safety evidence authority search person incident lawful custodial arrest based upon need disarm discover evidence depend may later decide probability particular arrest situation weapons evidence fact found upon person suspect ibid instead mere fact lawful arrest justifies full search person ibid robinson meant police acted permissibly searching inside package cigarettes found man arrested decision two terms ago riley california reaffirmed robinson categorical rule explained rule applied situations envisioned fourth amendment adopted slip riley concerned search data contained memory modern cell phone absent precise guidance founding era wrote generally determine whether exempt given type search warrant requirement assessing one hand degree intrudes upon individual privacy degree needed promotion legitimate governmental interests ibid blood breath tests measure blood alcohol concentration new searches cell phones riley founding era provide definitive guidance whether allowed incident lacking guidance engage mode analysis riley examine degree intrud upon individual privacy degree needed promotion legitimate governmental interests ibid begin considering impact breath blood tests individual privacy interests discuss type test turn years ago said breath tests implicat significant privacy concerns skinner remains today first physical intrusion almost negligible breath tests require piercing skin entail minimum inconvenience minnesota describes version breath test process requires arrestee blow continuously seconds mouthpiece connected tube test machine brief respondent independent sources describe breath test devices essentially terms see supra effort demanding blowing party balloon petitioner bernard argues however process nevertheless significant intrusion arrestee must insert mouthpiece machine mouth reply brief nothing painful strange requirement use straw drink beverages common practice one object contrary bernard test significant intrusion capture ordinary exhalation kind routinely exposed public instead sample alveolar deep lung air brief petitioner humans never known assert possessory interest emotional attachment air lungs air humans exhale part bodies exhalation natural process indeed one necessary life humans hold breath minutes air breathed breath analyzing machine including deep lung air sooner later exhaled even without test see generally hall guyton hall textbook medical physiology ed prior cases upheld warrantless searches involving physical intrusions least significant entailed administration breath test recently described process collecting dna sample rubbing swab inside person cheek negligible intrusion maryland king slip also upheld scraping underneath suspect fingernails find evidence crime calling limited intrusion cupp murphy breath test intrusive either procedures second breath tests capable revealing one bit information amount alcohol subject breath respect contrast sharply sample cells collected swab maryland king although dna obtained law issue case lawfully used identification purposes slip process put possession law enforcement authorities sample wealth additional highly personal information potentially obtained breath test contrast results bac reading machine nothing sample anything left possession police finally participation breath test experience likely cause great enhancement embarrassment inherent arrest see skinner supra breath test involves minimum embarrassment act blowing straw inherently embarrassing evidentiary breath tests administered manner causes embarrassment tests normally administered private police station patrol car mobile testing facility public view see supra moreover placed arrest individual expectation privacy necessarily diminished maryland king supra slip reasons reiterate said skinner breath test implicat significant privacy concerns blood tests different matter require piercing skin extract part subject body skinner supra see also mcneely opinion slip blood draws compelled physical intrusion beneath defendant skin veins opinion roberts slip blood draws significant bodily intrusions humans exhale air lungs many times per minute humans continually shed blood true course people voluntarily submit taking blood samples part physical examination process involves little pain risk see plurality opinion slip citing schmerber nevertheless many process one relish significantly intrusive blowing tube perhaps many implied consent laws including minnesota specifically prescribe breath tests administered usual case instead blood tests give motorists measure choice test take see erwin stat subd addition blood test unlike breath test places hands law enforcement authorities sample preserved possible extract information beyond simple bac reading even law enforcement agency precluded testing blood purpose measure bac potential remains may result anxiety person tested assessed impact breath blood testing privacy interests look asserted need obtain bac readings persons arrested drunk driving federal government paramount interest preserving safety public highways mackey montrym although number deaths injuries caused motor vehicle accidents declined years statistics still staggering see nhtsa traffic safety facts overview fatalities injuries nhtsa traffic safety facts data summary motor vehicle crashes may table fatalities injuries alcohol consumption leading cause traffic fatalities injuries past decade annual fatalities accidents ranged deaths deaths nhtsa driving recent data report total fatalities average one death every minutes cases long recognized carnage slaughter caused drunk drivers neville breithaupt abram justice sotomayor partial dissent suggests interests fighting drunk driving satisfied suspected drunk drivers arrested since arrests take intoxicated drivers roads might harm see post opinion concurring part dissenting part course solely concerned neutralizing threat posed drunk driver already gotten behind wheel also compelling interest creating effective deterrent drunken driving individuals make responsible decisions become threat others first place mackey supra deter potential drunk drivers thereby reduce injuries federal government taken series steps recounted earlier see supra briefly recapitulate pegging inebriation specific level blood alcohol passed implied consent laws induce motorists submit bac testing laws originally provided refusal submit result loss privilege driving use evidence refusal prosecution recently federal government concluded consequences insufficient particular license suspension alone unlikely persuade dangerous offenders drive bac significantly current limit recidivists agree test lead severe criminal sanctions nhtsa implied consent refusal impact pp xvii nhtsa use warrants breath test refusal laws issue present cases make crime refuse submit bac test designed provide incentive cooperate cases conclude serve important function petitioners justice sotomayor contend federal government combat drunk driving ways impact personal privacy arguments unconvincing chief argument score officer making arrest drunk driving allowed administer bac test unless officer procures search warrant time obtain usable test results governmental interest warrantless breath testing justice sotomayor claims turns burden obtaining warrant likely frustrate governmental purpose behind search post quoting camara municipal city county san francisco argument contravenes decisions holding legality search incident arrest must judged basis categorical rules robinson example one claimed object search package cigarettes presented danger arresting officer risk destroyed time taken secure search warrant nevertheless upheld constitutionality warrantless search package concluding categorical rule needed give police adequate guidance police officer determination search person suspect arrested necessarily quick ad hoc judgment fourth amendment require broken instance analysis step search cf riley slip police workable rules balancing competing interests must large part done categorical basis ad hoc fashion individual police officers brackets ellipsis internal quotation marks omitted surprising language justice sotomayor quotes justify approach comes case law case addressed routine home searches possible housing code violations see camara camara express concern passage dissent quotes whether public interest demands creation general exception fourth amendment warrant requirement emphasis added camara explain apply existing exception let alone exception searches incident lawful arrest whose applicability robinson riley make plain never turned variables quickly officer able obtain warrant particular circumstances faces advocating approach petitioners justice sotomayor cite language mcneely opinion see brief petitioner post mcneely concerned exception warrant requirement exigent circumstances always requires determinations basis decision case slip although justice sotomayor contends categorical doctrine exigent circumstances doctrine actually parts single framework post mcneely careful note decision address exceptions warrant requirement slip petitioners justice sotomayor next suggest requiring warrant bac testing every case motorist arrested drunk driving impose great burden police courts course argument made searching objects found arrestee possession cases permit even absence warrant cigarette package robinson motorist arrested drunk driving flask pocket motorist arrested driving influence marijuana appears marijuana cigarette person unmarked bottle pills search warrant required every search incident arrest involve exigent circumstances courts swamped even arbitrarily singled bac tests incident arrest special treatment appears dissent see post impact courts considerable number arrests every year driving influence enormous million fbi uniform crime report crime arrests fall particularly sparsely populated areas small task courts field large new influx warrant applications come day year hour many jurisdictions judicial officers authority issue warrants within districts see fed rule crim proc rule crim proc rural areas districts may small number judicial officers north dakota instance state district judges spread across eight judicial judges assisted magistrates magistrates state given location state relatively state officials authority issue search yet state population roughly sees nearly arrests year office north dakota attorney general crime north dakota pp small number judicial officers authorized issue warrants parts state burden fielding bac warrant applications hours per day days year light burden petitioners justice sotomayor suggest light burden prior precedents petitioners minimum show special need warrants bac testing therefore appropriate consider benefits applications provide search warrants protect privacy two main ways first ensure search carried unless neutral magistrate makes independent determination probable cause believe evidence found see riley slip second magistrate finds probable cause warrant limits intrusion privacy specifying scope search area searched items sought chadwick abrogated grounds acevedo well functions performed warrant applications petitioners propose order persuade magistrate probable cause search warrant officer typically recite facts led officer find probable cause arrest namely probable cause believe bac test reveal motorist blood alcohol level limit three cases suggest see part ii supra facts establish probable cause largely one stop next consist largely officer characterization observations example strong odor alcohol motorist wobbled attempting stand motorist paused reciting alphabet counting backwards magistrate poor position challenge characterizations second function served search warrants delineating scope search warrants question serve function every case scope warrant simply bac test arrestee cf skinner light standardized nature tests minimal discretion vested charged administering program virtually facts neutral magistrate evaluate reasons requiring police obtain warrant every case impose substantial burden commensurate benefit petitioners advance alternatives warrantless bac tests incident arrest poor substitutes relying recent nhtsa report petitioner birchfield identifies strategies claims least effective implied consent laws including sobriety checkpoints installing ignition interlocks repeat offenders cars disable operation driver breath reveals sufficiently high alcohol concentration alcohol treatment programs brief petitioner birchfield ignores fact cited report describes many measures checkpoints significantly costly test refusal penalties nhtsa goodwin et countermeasures work highway safety countermeasures guide state highway safety offices ed others ignition interlocks target segment population still others treatment programs already widespread use see including north dakota minnesota moreover nhtsa report line agency guidance elsewhere stresses bac test refusal penalties effective consequences refusal made severe including addition criminal penalties petitioner bernard objects whole idea analyzing breath blood tests searches incident arrest doctrine argues protect sort governmental interests warrantless breath blood tests serve reading precedents permit search arrestee solely prevent arrestee obtaining weapon taking steps destroy evidence see reply brief chimel example derived limitation scope permitted search area arrestee might reach principle officers may reasonably search area within might gain possession weapon destructible evidence stopping arrestee destroying evidence bernard argues critically different preventing loss blood alcohol evidence result body metabolism alcohol natural process arrestee little control reply brief distinction bernard draws arrestee active destruction evidence loss evidence due natural process makes little sense situations state justifiably concerned evidence may lost bernard explain cause loss dispositive fact many cases recognized state concern avoiding arrestee intentional destruction evidence evidence preservation avoiding loss evidence generally riley slip see also robinson need preserve evidence person knowles iowa need discover preserve evidence concern destruction loss evidence emphasis added virginia moore need safeguard evidence concern preserving evidence preventing loss readily encompasses inevitable metabolization alcohol blood reason suspect chimel use word destruction deliberate decision rule evidence loss mostly beyond arrestee control case involve evidence subject dissipation natural processes sign opinion situation mind bernard attempts derive concrete support position schmerber case stated destruction evidence direct control accused danger present respect searches involving intrusions beyond body surface bernard reads mean arrestee required take chemical test incident arrest brief petitioner using term chemical test bernard obscures fact schmerber passage addressed type test issue case namely blood test described blood tests searches involving intrusions beyond body surface saw searches implicating important interests human dignity privacy although appreciated well blood tests involv virtually risk trauma pain point searches still impinge far sensitive interests typical search person arrestee cf supra breath tests unlike blood tests invasive body skinner emphasis added therefore comments schmerber inapposite comes type test bernard asked take schmerber involve breath test question breath tests legality schmerber said nothing finally bernard supports distinction using passage mcneely opinion distinguishes easily disposable evidence suspect control evidence like blood alcohol evidence lost natural process gradual relatively predictable manner slip see reply brief bernard fails note issue paragraph addressed mcneely concerned one exception usual warrant requirement exception exigent circumstances previously discussed exception always understood involve evaluation particular facts case contrast concerned exception made clear robinson repeated mcneely authority categorical depend evaluation threat officer safety threat evidence loss particular assessed effect bac tests privacy interests need tests conclude fourth amendment permits warrantless breath tests incident arrests drunk driving impact breath tests privacy slight need bac testing great reach different conclusion respect blood tests blood tests significantly intrusive reasonableness must judged light availability less invasive alternative breath test respondents offered satisfactory justification demanding intrusive alternative without warrant neither respondents amici dispute effectiveness breath tests measuring bac breath tests common use many years results admissible widely credited juries respondents dispute accuracy utility justification warrantless blood tests one advantage blood tests ability detect alcohol also substances impair driver ability operate car safely see brief new jersey et al amici curiae brief amicus curiae breath test police measures disposal reason believe motorist may influence substance example breath test indicates clearly impaired motorist little alcohol blood nothing prevents police seeking warrant blood test sufficient time particular circumstances relying exigent circumstances exception warrant requirement see mcneely slip blood test also requires less driver participation breath test order technician take blood sample needed subject remain still either voluntarily immobilized thus possible extract blood sample subject forcibly resists many reasonably prefer take step see neville north dakota example tells us generally opposes practice risk dangerous altercations police officers arrestees rural areas arresting officer may backup brief respondent current north dakota law cases involving accident results death serious injury may blood taken arrestees resist compare cent code ann true blood test unlike breath test may administered person unconscious perhaps result crash unable needed take breath test due profound intoxication injuries reason believe situations common arrests arise police may apply warrant need breath test may also ineffective arrestee deliberately attempts prevent accurate reading failing blow tube requisite length time necessary force courts held conduct qualifies refusal undergo testing andrews turner ohio kunneman civ app see generally erwin collecting cases may prosecuted warrant blood test may sought breath tests significantly less intrusive blood tests cases amply serve law enforcement interests conclude breath test blood test may administered search incident lawful arrest drunk driving cases involving reasonable searches incident arrest warrant needed vi concluded search incident arrest doctrine justify warrantless taking blood sample must address respondents alternative argument tests justified based driver legally implied consent submit well established search reasonable subject consents schneckloth bustamonte sometimes consent search need express may fairly inferred context cf florida jardines slip marshall barlow prior opinions referred approvingly general concept laws impose civil penalties evidentiary consequences motorists refuse comply see mcneely supra plurality opinion slip neville supra petitioners question constitutionality laws nothing say read cast doubt another matter however state insist upon intrusive blood test also impose criminal penalties refusal submit test must limit consequences motorists may deemed consented virtue decision drive public roads respondents amici concede point north dakota emphasizes law makes refusal misdemeanor suggests laws punishing refusal severely present different issue brief respondent borrowing fifth amendment jurisprudence suggests motorists deemed consented conditions reasonable nexus privilege driving entail penalties proportional severity violation brief amicus curiae fourth amendment setting standard differ substance one apply since reasonableness always touchstone fourth amendment analysis see brigham city stuart applying standard conclude motorists deemed consented submit blood test pain committing criminal offense vii remaining task apply legal conclusions three cases us petitioner birchfield criminally prosecuted refusing warrantless blood draw therefore search refused justified search incident arrest basis implied consent indication record briefing breath test failed satisfy state interests acquiring evidence enforce laws birchfield north dakota presented information suggest exigent circumstances exception justified warrantless search cf mcneely slip unable see basis justify warrantless test birchfield blood conclude birchfield threatened unlawful search judgment affirming conviction must reversed bernard hand criminally prosecuted refusing warrantless breath test test permissible search incident bernard arrest drunk driving arrest whose legality bernard contested accordingly fourth amendment require officers obtain warrant prior demanding test bernard right refuse unlike petitioners beylund prosecuted refusing test submitted blood test police told law required submission license suspended fined administrative proceeding north dakota held beylund consent voluntary erroneous assumption state permissibly compel blood breath tests voluntariness consent search must determined totality circumstances schneckloth supra leave state remand reevaluate beylund consent given partial inaccuracy officer accordingly reverse judgment north dakota remand case proceedings inconsistent opinion affirm judgment minnesota vacate judgment north dakota remand case proceedings inconsistent opinion ordered opinion sotomayor nos writ certiorari north dakota writ certiorari minnesota writ certiorari north dakota june justice sotomayor justice ginsburg joins concurring part dissenting part today considers three consolidated cases join majority disposition birchfield north beylund levi holds exception fourth amendment warrant requirement permit warrantless blood tests dissent disposition bernard minnesota holds exception permits warrantless breath tests governmental interest categorically makes impractical officer obtain warrant measuring driver alcohol level fourth amendment prohibits searches without warrant unless exigent circumstances exist particular recognizes proper disposition case turns whether fourth amendment guarantees right subjected warrantless breath test arrested fourth amendment provides right people secure persons houses papers effects unreasonable searches seizures shall violated warrants shall issue upon probable cause supported oath affirmation particularly describing place searched persons things seized ultimate touchstone fourth amendment brigham city stuart citizen fourth amendment right free unreasonable searches disappear upon arrest police officers may want conduct range searches placing person arrest may want pat arrestee search pockets purse peek inside wallet scroll cellphone examine car dwelling swab cheeks take blood breath samples determine level intoxication officer authorized conduct searches simply arrested someone search must separately analyzed determine reasonableness person arrested warrants usual safeguard unreasonable searches guarantee search random arbitrary ac government agents instead narrowly limited objectives scope skinner railway labor executives warrants provide detached scrutiny neutral magistrate thus ensur objective determination whether intrusion justified ibid give life instruction fourth amendment designed prevent simply redress unlawful police action steagald internal quotation marks omitted securing warrant search rule reasonableness warrant requirement subject specifically established exceptions katz determine whether exempt given type search warrant requirement traditionally assess es one hand degree intrudes upon individual privacy degree needed promotion legitimate governmental interests riley california slip internal quotation marks omitted weighing whether public interest demands creation general exception fourth amendment warrant requirement question whether public interest justifies type search question specifically whether burden obtaining warrant likely frustrate governmental purpose behind search camara municipal city county san francisco see also powell concurring noting areas ranging building inspections automobile searches general approach exceptions warrant requirement determine whether system constructed feasible dist eastern dist must ask whether warrant requirement unduly frustrate governmental interest applying principles past cases recognized two kinds exceptions warrant requirement implicated exceptions particularities individual case justify warrantless search instance others categorical exceptions commonalities among class cases justify dispensing warrant requirement cases regardless individual circumstances relevant allows warrantless searches basis exigencies particular case make needs law enforcement compelling warrantless search objectively reasonable instance missouri mcneely slip quoting kentucky king defining feature exigent circumstances exception need search becomes clear facts circumstances particular case considered light totality circumstances slip exigencies include officers need provide assistance occupant home engage pursuit fleeing suspect enter burning building put fire investigate cause slip citations omitted exigencies also arise efforts measure driver blood alcohol level schmerber california instance man sustained injuries car accident transported hospital police officer arrested drunk driving ordered warrantless blood test measure blood alcohol content noted although warrant requirement generally applies postarrest blood tests warrantless search justified case several hours passed police investigated scene crime schmerber taken hospital precluding timely securing warrant also recognizes forms searches governmental interest categorically outweigh person privacy interest virtually circumstance search conducted relevant exception exception allows officers conduct limited postarrest search without warrant combat risks arise arrest situation warrant obtained remove weapons arrestee might seek use order resist arrest effect evidence arrestee person order prevent concealment destruction riley slip quoting chimel california rule applies categorical ly arrests need warrantless search arises fact lawful arrest reason arrest circumstances surrounding robinson given different kinds exceptions warrant requirement form exception necessary particular kind postarrest search next step ask whether governmental need conduct warrantless search arises threats custodial therefore justif ies dispensing warrant requirement across board instead whether threats may implicated particular way particular case therefore better addressed consideration exceptions warrant requirement one exigent circumstances riley slip alterations internal quotation marks omitted condense doctrinal considerations straightforward rule question whether light individual privacy legitimate governmental interest justifies warrantless searches whether governmental interest adequately addressed exception requires nature categorical exception warrant requirement twice applied framework recent terms riley california addressed whether placing person arrest police officer may conduct warrantless search cell phone data california asked categorical rule rejected request concluding cell phones present generic harms long justified exception found phone data posed neither danger officer safety risk evidence destruction physical phone secured slip nevertheless acknowledged exigent circumstances exception might available never situation slip internal quotation marks omitted emphasized light availability exigent circumstances exception reason believe law enforcement officers able address rare needs require search slip similarly missouri mcneely applied doctrinal analysis case involving police efforts measure drivers blood alcohol levels case missouri argued natural dissipation alcohol person blood justified per se exigent circumstances exception warrant requirement essence new kind categorical exception recognized exigencies exist like schmerber warrantless searches slip also noted many drunk driving situations exigencies exist instance warrant process significantly increase delay testing officer take steps secure warrant subject prepared test plausible justification exception warrant requirement slip thus found unnecessary depart careful assessment exigency adopt categorical rule proposed state slip ii challenge mcneely holding categorical exigency exception necessary accommodate governmental interests associated dissipation blood alcohol arrests instead seek exempt breath tests warrant requirement categorically doctrine majority agrees wrong discussed regardless exception state requests traditional framework asks whether light privacy interest stake legitimate governmental interest ever requires conducting breath searches without warrant whether governmental interest adequately addressed exception requires categorical exception warrant requirement framework directs conclusion categorical rule breath tests unnecessary address governmental interests combating drunk driving beginning governmental interests dispute must tools combat drunk driving see ante neither demonstrated obtaining warrant cases already covered exigent circumstances exception likely frustrate governmental purpose behind search camara first cites governmental interest protecting public drunk drivers see ante critical note person stopped drunk driving arrested longer poses immediate threat public person already custody prior administration breath test serious claim time takes obtain warrant increase danger drunk driver poses fellow citizens second cites governmental interest preventing destruction loss evidence see ante neither identify practical reasons obtaining warrant making arrest conducting breath test compromises quality evidence obtained contrary delays inherent administering reliable breath tests generally provide ample time obtain warrant common misconception breath tests conducted roadside immediately driver arrested preliminary testing conducted roadside reliability concerns roadside tests confine use circumstances establishing probable cause arrest see erwin defense drunk driving cases ed screening devices used impractical utilize evidential breath tester ebt roadside various work sites standard evidentiary breath test conducted motorist arrested transported police station governmental building mobile testing facility officers access reliable breath testing machinery brief respondent national highway transportation safety admin nhtsa berning et refusal intoxication testing report congress transporting motorist equipment site potential delay process however officers must also observe subject minutes ensure residual mouth alcohol inflate results expose test evidentiary challenge trial dissipated subject inserted food drink many including minnesota officers must give motorist window time within contact attorney administering finally breath test machine already active police officer must set north dakota intoxilyzer machine take long minutes necessary steps standard breath test conducted well arrest effectuated minnesota appeals explained nearly breath tests involve time lag minutes two hours state larson app see also state chirpich app north dakota minnesota give police period time motorist pulled within administer breath test cent code ann stat subd window police seek warrants particularly true light advances permit expeditious processing warrant applications mcneely slip describing increased availability telephonic warrants riley slip describing jurisdictions adopted warrant system takes less minutes rules crim proc supp allowing telephonic warrants rules crim proc moreover counsel north dakota explained oral argument state uses typical system judges available even see tr oral arg officer secure warrant motorist transported test prepared said plausible justification exception warrant requirement mcneely slip neither provide evidence suggest normal course affairs obtaining warrant conducting breath test exceed allotted window third cite governmental interest minimizing costs gathering evidence drunk driving neither demonstrated requiring police obtain warrants breath tests impose sufficiently significant burden state resources justify elimination fourth amendment warrant requirement notes north dakota judges magistrate judges authorized issue warrants see ante north roughly arrests annually concludes police required obtain warrants every search incident arrest involve exigent circumstances courts swamped ante conclusion relies inflated numbers unsupported inferences assuming north dakota police officers obtain warrants arrests today assuming need obtain warrant every arrest tomorrow state judges magistrate judges need issue fewer two extra warrants per minnesota nearly ratio judges arrests face roughly numbers suggest burden obtaining warrant conducting breath test small even numbers overstate burden significant degree need obtain warrants drivers refuse testing significant majority drivers voluntarily consent breath tests even without criminal penalties refusal north dakota people refuse breath tests minnesota refuse nhtsa namuswe coleman berning breath test refusal rates update including impose civil penalties refusal average refusal rate slightly higher say north dakota minnesota refusal rates rise double mean judges magistrate judges need issue fewer one extra warrant bears repeating finds categorical exception warrant requirement state judges magistrate judges need issue less one extra warrant week fourth alludes need collect evidence conveniently mere convenience investigating drunk driving justify exception warrant requirement postarrest exceptions warrant requirement require law enforcement interest separate criminal investigation justification search incident arrest rule officer safety prevention evidence concealment destruction chimel justification booking exception allows police obtain fingerprints dna without warrant booking arrestee police station administrative need identification see maryland king slip justification inventory search exception allows police inventory items arrestee personal possession car need protect owner property custody police insure claims lost stolen vandalized property guard police danger colorado bertine never said mere convenience gathering evidence justifies exception warrant requirement see florida wells suppressing evidence supposed inventory search done without standardized criteria suggesting instead purposeful general means discovering evidence simple collection evidence justifies exception warrant requirement even warrant easily obtained exceptions become rule ibid finally general matter ample tools force compliance lawfully obtained warrants never cast doubt ability impose criminal penalties obstructing search authorized lawfully obtained warrant resort violent compliance necessary compel test police officer obtains warrant conduct breath test citizens subjected serious penalties obstruction justice decline cooperate test already taken weighty step characterizing breath tests searches fourth amendment purposes see skinner typical breath test requires subject actively blow alveolar deep lung air machine ibid although process physically blowing machine completed little minutes process significantly longer person administering test must calibrate machine collect least two separate samples arrestee change mouthpiece reset machine conduct additional testing indicated disparities two although searches certainly invasive breath tests justice status fourth amendment searches exaggerated time pressures mere convenience collecting evidence burden asking judges issue extra couple warrants per month costs high render reasonable search without fourth amendment becomes empty promise protecting citizens unreasonable searches evaluating governmental privacy interests stake final step determine whether situations warrants interfere legitimate governmental interests accommodated categorical exception warrant requirement shown many circumstances obtaining warrant delay administration breath test otherwise compromise governmental interest cited clear allowing categorical exception warrant requirement considerable overgeneralization mcneely slip concluded riley mcneely unusual issues arise better addressed consideration exceptions warrant requirement riley slip see also mcneely slip opinion sotomayor without even considering comparative effectiveness categorical exceptions reaches categorical exception enshrines breath tests majority apparently assumes postarrest search analyzed doctrine see ante three cases us drivers searched told required submit search placed arrest drunk driving therefore consider doctrine applies breath blood tests incident arrests explained earlier police officers may want conduct range different searches placing person arrest searches must separately analyzed fourth amendment compliance two narrow types postarrest searches analyzed together rubric doctrine searches disarm arrestees pose danger warrant obtained searches find evidence arrestees incentive destroy warrant obtained chimel forms postarrest searches analyzed differently present needs require tailored exceptions warrant requirement see supra discussing postarrest application exigency exception see also supra discussing postarrest booking exceptions fact person arrest tell us warrant exceptions apply kind postarrest search way analyze exception appropriate ask whether exception best addresses nature postarrest search needs fulfills yet majority never explains framework justifications applications categorical scope best suited breath tests contrary exception particularly ill suited breath tests extent discusses fit breath tests rationales underlying exception says evidence preservation one core values served exception worries evidence may lost breath tests conducted ante course exception concerned evidence destruction insofar destruction occur warrant sought breath tests except rare circumstances conducted time arrest warrant obtained separate location minutes arrest effectuated alone reason reject exception forged address immediate needs arrests exception categorical reach makes even less suitable exception applied categorically precisely needs addresses arise every arrest robinson government need conduct breath test present arrests drunk driving asserted need conduct breath test without warrant arises warrant obtained significant delay arrest testing conditions require warrantless breath searches short highly situational defy logical underpinnings exception categorical application maryland king dispensed warrant requirement allowed dna searches following arrest least attempted justify search using booking exception interest identifying arrestees slip slip scalia dissenting lacks even pretense attempting situate breath searches within narrow weighty law enforcement needs historically justified limited use warrantless searches fear continues road fourth amendment warrant requirement become nothing suggestion thomas concurring part dissenting part nos writ certiorari north dakota writ certiorari minnesota writ certiorari north dakota june justice thomas concurring judgment part dissenting part compromise reaches today good one deciding warrantless tests revealing blood alcohol concentration bac arrested driver constitutional contorts exception fourth amendment warrant requirement far simpler answer question presented one rejected missouri mcneely tests revealing bac driver suspected driving drunk constitutional exception warrant requirement thomas dissenting slip today decision chips away exception warrant requirement recently admonished police officer determination search person suspect arrested necessarily quick ad hoc judgment fourth amendment require broken instance analysis step search robinson precedents search incident lawful arrest require additional justification ibid recent decision riley california begin retreat categorical approach feared search issue search information cell phone bore little resemblance type brief physical search contemplated past decisions slip joined riley however resisted temptation permit searches kinds data others slip instead asked generally whether entire category effects searchable without warrant slip today decision begins riley left purports apply robinson departs categorical approach holding warrantless breath tests prevent destruction bac evidence constitutional searches incident arrest warrantless blood tests ante breath tests significantly less intrusive blood tests cases amply serve law enforcement interests conclude breath test blood test may administered search incident lawful arrest drunk driving hairsplitting makes little sense either exception permits bodily searches prevent destruction bac evidence justifies result arbitrary line sand blood breath tests balancing invasiveness particular type search government reasons search ante balancing bad people ratification already weighed policy tradeoffs constitutional rights entail luis thomas concurring judgment slip see also crawford washington also bad law enforcement officers depend predictable rules job members exhorted past see arizona gant alito dissenting see also faulting leav ing law relating searches incident arrest confused unstable state today application exception bound cause confusion lower courts choice allow bac searches undeniably appealing reins pernicious problem drunk driving also purports preserve fourth amendment protections compromise little support existing precedents ii better far simpler way resolve cases applying per se rule proposed mcneely approach warrantless breath blood tests constitutional natural metabolization bac creates exigency police probable cause believe driver drunk naturally follows police may conduct search circumstances dissenting opinion slip mcneely rejected rule instead adopted test examining whether facts particular case presented exigent circumstances justifying warrantless search slip ruled natural dissipation alcohol blood categorically create exigency every case slip destruction bac evidence suspect naturally dissipates time gradual relatively predictable manner according qualitatively different destruction evidence circumstances suspect control easily disposable evidence slip today decision rejects mcneely arbitrary distinction destruction evidence generally destruction bac evidence searches incident arrest ante declares distinction arrestee active destruction evidence loss evidence due natural process makes little sense ante agree see mcneely supra thomas dissenting slip also makes little sense reject mcneely arbitrary distinction searches incident arrest also searches justified identical concerns destruction evidence mcneely distinction less arbitrary searches justified exigent circumstances justified search incident arrest wrong mcneely today compromise perhaps inevitable consequence error searches contemplated state laws issue cases constitutional exception warrant requirement respectfully concur judgment part dissent part footnotes together bernard minnesota certiorari minnesota beylund levi director north dakota department transportation also certiorari north dakota footnotes addition bac may determined testing subject urine also requires test subject cooperation urine tests appear less common cases breath blood tests none cases us involves one see smith moving grief action two families push stronger dui laws bismarck tribune haga kind peace parents two young boys killed campground accident urge tougher dui penalties grand forks herald pp may evidence arrestee mouth searched appropriate circumstances time founding see cuddihy fourth amendment origins original meaning still searching mouth weapons contraband requiring arrestee give breath blood see north dakota district judges http internet materials last visited june see north dakota magistrates http north dakota justices apparently also authority issue warrants statewide see nd op atty highly doubt regularly handle applications much less graveyard shifts justice sotomayor objects treating warrantless breath tests searches incident lawful arrest two additional grounds first maintains postarrest exceptions warrant requirement require law enforcement interest separate criminal investigation post least respect doctrine true historical authorities discussed earlier attest see part supra doctrine always understood serving investigative ends discover ing seiz ing evidences crime weeks see also robinson emphasizing need discover evidence using breath tests obtain evidence intoxication therefore well within historical understanding doctrine purposes second justice sotomayor contends doctrine apply narrower exception warrant requirement adequately satisfies governmental needs asserted post see also post cases certainly recognized targeted exceptions warrant requirement may justify warrantless search even exception riley california slip justice sotomayor cites authority proposition exception warrant requirement apply simply narrower exception might apply justice thomas partly dissents holding calling distinction breath blood tests arbitrary line sand post opinion concurring judgment part dissenting part adhering position rejected mcneely justice thomas hold breath blood tests constitutional without warrant natural metabolization alcohol bloodstream post yet justice thomas dispute conclusions blood draws invasive breath tests breath tests generally serve state interests combating drunk driving effectively blood tests decision riley calls balancing individual privacy interests legitimate state interests determine reasonableness category warrantless search issue contrary justice thomas contention balancing leave law enforcement officers lower courts unpredictable rules categorical post indeed today decision provides clear guidance fourth amendment allows warrantless breath tests general rule allow warrantless blood draws incident lawful arrest remand finds beylund voluntarily consent address whether evidence obtained search must suppressed search carried pursuant state statute see heien north carolina slip evidence offered administrative rather criminal proceeding see pennsylvania bd probation parole scott beylund notes remedies may available state law see brief petitioner pp footnotes see justification warrantless blood warrantless breath tests also dissent parts majority opinion justify conclusions respect blood tests availability warrantless breath tests see ante wrong suggest seeking extension existing exception rather creation new exception breath searches need determine whether governmental interest searches accomplished without excusing warrant requirement ante contrary sentence cites illustrates question always whether particular type search question reasonable conducted without warrant camara answer question every case courts must ask whether burden obtaining warrant likely frustrate governmental purpose behind search ibid question may answered based existing doctrine may require creation new doctrine must always asked quibbles unremarkable statement categorical doctrine exigent circumstances doctrine part framework arguing mcneely careful note decision address exceptions warrant requirement ante citing mcneely slip explains difference categorical exceptions exceptions generally nothing suggest two forms exceptions considered together analyzing whether reasonable exempt categorically particular form search fourth amendment warrant requirement go without saying analysis whether apply fourth amendment warrant exception must necessarily comparative narrower exception warrant requirement adequately satisfies governmental needs asserted sweeping exception overbroad lead unnecessary unreasonable searches fourth amendment contrary suggestion authority supports proposition see ante cases often deployed commonsense comparative check see riley california slip rejecting application exception exigency exception targeted wa address government concerns slip analyzing whether governmental interest better addressed consideration exceptions warrant requirement slip noting light availability exigent circumstances exception reason believe governmental interest satisfied without categorical exception mcneely slip holding availability exigency exception circumstances make obtaining warrant impractical reason accept overgeneralization per se rule reflect although bernard case arises minnesota north dakota similar breath test laws therefore consider together see nhtsa international assn chiefs police dwi detection standardized field sobriety testing participant guide session see stat subd person right consult attorney right limited extent unreasonably delay administration test see also kuhn commissioner public safety app finding minutes insufficient time contact attorney required submit test see office attorney general crime lab chemical test training student manual fall many tests conducted outer boundaries window see israel commissioner public safety app minute poststop delay mosher commissioner public safety wl minn june minute postarrest delay johnson commissioner public safety app minute postarrest delay scheiterlein commissioner public safety wl minn july minute poststop delay counsel north dakota represented oral argument larger jurisdictions takes half hour obtain warrant tr oral arg counsel said sometimes harder get somebody phone rural jurisdictions even took twice long process obtaining warrant unlikely take longer inherent delays preparing motorist testing particularly unlikely reach beyond window within officers conduct test seven thousand annual arrests divided judges magistrate judges extra warrants per judge magistrate judge per year divided weeks extra warrants per judge magistrate judge per week minnesota incidents year dept public safety office traffic safety minn impaired driving facts minnesota judges exercising probate jurisdiction issue warrants stat state district judges appear lion share work conservatively counting judges state judges issue warrants minnesota judicial branch report community similar north dakota amounts extra warrants per judge per week north dakota judges magistrate judges issue extra warrants per week assuming refusal rate see supra nn issue additional per week assuming refusal rate adjusting conservatively high refusal rate minnesota go additional warrants per judge per week see office attorney general crime lab approved method conduct breath tests intoxilyzer pp weighing governmental interests stake also downplays benefits warrants provide breath tests said unequivocally warrants usual safeguard unreasonable searches see katz legal relevance discussion clear event wrong conclude warrants provide little benefit says warrants breath tests issued based characterization police officer magistrate poor position challenge ante virtually warrants rely degree officer perception purpose warrants neutral arbiter determine whether inferences drawn officers perceptions circumstantial evidence sufficient justify search regardless particulars mode analysis dangerous road venture historically default warrants required part argument instead suggests without precedent value proven