maryland buie argued december decided february following maryland armed robbery two men one wearing red running suit police obtained arrest warrants respondent buie suspected accomplice executed warrant buie house buie arrested upon emerging basement one officers entered basement case someone else seized red running suit lying plain view trial denied buie motion suppress running suit suit introduced evidence buie convicted armed robbery weapons offense intermediate appellate affirmed denial suppression motion state appeals reversed ruling running suit inadmissible officer conducted protective sweep basement probable cause believe serious demonstrable potentiality danger existed held fourth amendment permits properly limited protective sweep conjunction arrest searching officer possesses reasonable belief based specific articulable facts area swept harbors individual posing danger arrest scene michigan long terry ohio pp holding respectively frisk roadside search automobile passenger compartment reasonable despite absence warrant probable cause terry long balanced fourth amendment interests persons dealing immediate interests police protecting danger posed hidden weapons police analogous interest taking steps assure buie house harboring persons dangerous unexpectedly launch attack fact buie expectation privacy rooms examined police prior arrest mean rooms immune entry warrant required incident arrest officers precautionary matter without probable cause reasonable suspicion look closets spaces immediately adjoining place arrest attack launched beyond however terry long must articulable facts taken together rational inferences facts warrant reasonably prudent officer believing area swept harbors individual posing danger protective sweep full search premises may extend cursory inspection spaces person may found sweep lasts longer necessary dispel reasonable suspicion danger event longer takes complete arrest depart premises pp chimel california held absence search warrant justifiable search incident arrest extend beyond arrestee person area within might obtained weapon distinguished first chimel concerned search entire house evidence crime arrest made limited intrusion contemplated protective sweep second justification search incident arrest chimel threat posed arrestee safety threat posed house properly unseen third parties house appeals applied unnecessarily strict fourth amendment standard requiring protective sweep justified probable cause case remanded application proper standard pp white delivered opinion rehnquist blackmun stevens scalia kennedy joined stevens post kennedy post filed concurring opinions brennan filed dissenting opinion marshall joined post dennis sweeney deputy attorney general maryland argued cause petitioner briefs joseph curran attorney general gary bair mary ellen barbera ann bosse assistant attorneys general alexander williams lawrence robbins argued cause amicus curiae urging reversal brief solicitor general starr assistant attorney general dennis deputy solicitor general bryson kathleen felton john kopolow argued cause respondent brief alan murrell michael braudes nancy forster gary offutt gregory evans daniel hales emory plitt judith ronzio george webster jack yelverton fred inbau wayne schmidt james manak filed brief americans effective law enforcement et al amici curiae urging reversal ira reiner harry sondheim eugene tavris field brief appellate committee california district attorneys association amicus curiae justice white delivered opinion protective sweep quick limited search premises incident arrest conducted protect safety police officers others narrowly confined cursory visual inspection places person might hiding case must decide level justification required fourth fourteenth amendments police officers effecting arrest suspect home pursuant arrest warrant may conduct warrantless protective sweep part premises appeals maryland held running suit seized plain view protective sweep suppressed respondent armed robbery trial officer conducted sweep probable cause believe serious demonstrable potentiality danger existed md conclude fourth amendment permit protective sweep undertaken searching officer possesse reasonable belief based specific articulable facts taken together rational inferences facts reasonably warrant ed officer believing michigan long quoting terry ohio area swept harbored individual posing danger officer others accordingly vacate judgment remand application standard february two men committed armed robbery godfather pizza restaurant prince george county maryland one robbers wearing red running suit day prince george county police obtained arrest warrants respondent jerome edward buie suspected accomplice robbery lloyd allen buie house placed police surveillance february police executed arrest warrant buie first police department secretary telephone buie house verify home secretary spoke female first buie six seven officers proceeded buie house inside officers fanned first second floors corporal james rozar announced freeze basement one come surprise officers service revolver drawn rozar twice shouted basement ordering anyone come voice asked calling rozar announced three times police show hands app eventually pair hands appeared around bottom stairwell buie emerged basement arrested searched handcuffed rozar thereafter detective joseph frolich entered basement case someone else noticed red running suit lying plain view stack clothing seized trial denied buie motion suppress running suit stating part man comes basement police know many people charged serious offense state introduced running suit evidence buie trial jury convicted buie robbery deadly weapon using handgun commission felony special appeals maryland affirmed trial denial suppression motion stated detective frolich go basement search evidence look suspected accomplice anyone else might pose threat officers scene md app traditionally sanctity person home castle requires police may invade without warrant except exigent circumstances police lawfully within home conduct measured standard reasonableness reason believe arrestee accomplices still large something less probable cause reasonable suspicion sufficient justify limited additional intrusion investigate possibility presence emphasis original ii disputed point buie arrest police right based authority arrest warrant search anywhere house buie might found including basement sufficient evidence citizen participation felony persuade judicial officer arrest justified constitutionally reasonable require open doors officers law payton new york also dispute detective frolich entry basement lawful seizure red running suit plain view officer probable cause believe evidence crime also lawful fourth amendment see arizona hicks issue case level justification fourth amendment required detective frolich legally enter basement see someone else petitioner state maryland argues general reasonableness balancing test police permitted conduct protective sweep whenever make arrest violent crime alternative suggested rule state contends protective sweeps fall within ambit doctrine announced terry ohio sweeps may conducted conjunction valid arrest whenever police reasonably suspect risk danger officers others arrest scene amicus curiae supporting state also argues standard reasonable articulable suspicion risk officer contends standard met respondent argues protective sweep may undertaken without warrant unless exigencies situation render warrantless search objectively reasonable according buie state shown neither exigent circumstances immediately enter buie house unforeseen danger arose officers house excuse failure obtain search warrant search dangerous persons believed premises buie contends even warrant requirement inapplicable justification relaxing standard something less probable cause sufficient respondent argues less individualized suspicion specific articulable facts supporting reasonable belief persons premises threat officers according buie specific articulable facts justify search basement iii goes without saying fourth amendment bars unreasonable searches seizures skinner railway labor executives cases show determining reasonableness balanced intrusion individual fourth amendment interests promotion legitimate governmental interests delaware prouse test search house office generally reasonable without warrant issued probable cause contexts however public interest neither warrant probable cause required skinner supra griffin wisconsin new jersey terry ohio terry case instructive present purposes held frisk weapons must tested fourth amendment general proscription unreasonable searches frisk involves entire rubric police conduct necessarily swift action predicated upon observations officer beat historically practical matter subjected warrant procedure ibid stated ready test determining reasonableness balancing need search invasion search entails quoting camara municipal san francisco applying balancing test held although frisk weapons constitutes severe though brief intrusion upon cherished personal security frisk reasonable weighed need law enforcement officers protect prospective victims violence situations may lack probable cause arrest therefore authorized limited patdown weapons reasonably prudent officer warranted belief based specific articulable facts mere inchoate unparticularized suspicion hunch dealing armed dangerous individual ibid michigan long principles terry applied context roadside encounter search passenger compartment automobile limited areas weapon may placed hidden permissible police officer possesses reasonable belief based specific articulable facts taken together rational inferences facts reasonably warrant officer believing suspect dangerous suspect may gain immediate control weapons quoting terry supra long expressly rejected contention terry restricted preventative searches person detained suspect sense long authorized frisk automobile weapons ingredients apply balance struck terry long present case possessing arrest warrant probable cause believe buie home officers entitled enter search anywhere house buie might found found however search longer particular justification entering rooms yet searched buie expectation privacy remaining areas house however mean rooms immune entry terry long concerned immediate interest police officers taking steps assure persons dealing armed able gain immediate control weapon unexpectedly fatally used instant case analogous interest officers taking steps assure house suspect arrested harboring persons dangerous unexpectedly launch attack risk danger context arrest home great greater roadside investigatory encounter terry long frisk occurs confrontation escalated point arrest protective sweep contrast occurs adjunct serious step taking person custody purpose prosecuting crime moreover unlike encounter street along highway arrest puts officer disadvantage adversary turf ambush confined setting unknown configuration feared open familiar surroundings recognized terry ven limited search outer clothing weapons constitutes severe though brief intrusion upon cherished personal security must surely annoying frightening perhaps humiliating experience terry supra permitted intrusion necessary protect officer harm suggest state entering rooms examined prior arrest de minimis intrusion may disregarded quite sure however arresting officers permitted circumstances take reasonable steps ensure safety making arrest interest sufficient outweigh intrusion procedures may entail agree state warrant required also hold incident arrest officers precautionary matter without probable cause reasonable suspicion look closets spaces immediately adjoining place arrest attack immediately launched beyond however hold must articulable facts taken together rational inferences facts warrant reasonably prudent officer believing area swept harbors individual posing danger arrest scene less required terry long cases think balance proper one emphasize protective sweep aimed protecting arresting officers justified circumstances nevertheless full search premises may extend cursory inspection spaces person may found sweep lasts longer necessary dispel reasonable suspicion danger event longer takes complete arrest depart premises iv affirmance required chimel california held absence search warrant justifiable search incident arrest extend beyond arrestee person area within arrestee might obtained weapon first chimel concerned search entire house evidence crime arrest made see limited intrusion contemplated protective sweep second justification search incident arrest considered chimel threat posed arrestee safety threat posed house properly unseen third parties house reach conclusion today therefore need disagree statement chimel invasion privacy results search man house characterized minor hold simply interference individual privacy freedom movement lawfully taken place intrusions automatically allowed despite absence warrant fourth amendment otherwise require ibid type search authorize today far removed search involved chimel moreover decidedly automati may conducted justified reasonable articulable suspicion house harboring person posing danger arrest scene conclude requiring protective sweep justified probable cause believe serious demonstrable potentiality danger existed appeals maryland applied unnecessarily strict fourth amendment standard fourth amendment permits properly limited protective sweep conjunction arrest searching officer possesses reasonable belief based specific articulable facts area swept harbors individual posing danger arrest scene therefore vacate judgment remand case appeals maryland proceedings inconsistent opinion ordered footnotes state argument level objective justification required danger inheres arrest violent crime brief petitioner rebutted terry ohio state argues fficers facing life threatening situation arresting violent criminal home forced pause ponder legal subtleties associated quantum proof analysis brief petitioner despite danger inheres encounters need police act quickly safety terry adopt brightline rule authorizing frisks weapons confrontational encounters even high crime areas possibility given individual armed significant terry requires reasonable individualized suspicion frisk weapons conducted approach applied protective sweep house reject state attempts analogize case pennsylvania mimms per curiam michigan summers intrusion mimms requiring driver lawfully stopped vehicle exit car de minimis summers held search warrant house carries authority detain occupants search completed state contends case mirror image summers arrest warrant carried authority search persons interfere arrest case however search warrant implied judicial determination police probable cause believe someone home committing crime existence arrest warrant implies nothing whether dangerous third parties found arrestee house moreover intrusion summers less severe much less susceptible exploitation protective sweep analogous case ybarra illinois held although armed warrant search bar bartender police frisk bar patrons absent individualized reasonable suspicion person frisked armed presently dangerous reasonable suspicion standard one relatively simple concepts embodied fourth amendment sokolow strikes proper balance officer safety citizen privacy reliance cursory nature search inconsistent statement arizona hicks search search refusal hicks sanction standard less probable cause ground search stereo cursory inspection rather search officer hicks moved turntable look serial number searching evidence plain simple interest officer safety exigency work search protective sweep without question search patdown terry supra permissible less probable cause limited necessary protect safety officers others justice stevens concurring today holds reasonable suspicion rather probable cause necessary support protective sweep arrest progress agree holding opinion believe important emphasize standard applies protective sweeps officers conducting sweep must reasonable basis believing search reduce danger harm violent interference mission short search must protective case justify officer frolich entry basement state burden demonstrate officers reasonable basis believing someone basement might attack otherwise try interfere arrest also safer go stairs instead simply guarding respondent removed house fact respondent offered resistance emerged basement somewhat inconsistent hypothesis danger attack hidden confederate persisted arrest moreover officer rozar testified worried possible danger arrested buie app officer frolich conducted search supplied explanation might thought another person basement said idea lived admission made telling officer frolich participation prearrest surveillance buie home maryland appeals impression search took place buie safely outside house handcuffed unarmed md suggests reasonable suspicion danger justified entry basement indeed officers concerned safety one expect officer rozar arrest guard basement door prevent surprise attacks app indicates officer frolich might time arrest reasonably look ed already open basement door ante ensure accomplice followed buie stairwell officer frolich merely look basement entered strategy sensible one wishes search basement surprising choice officer worried safety need risk entering stairwell state may thus face formidable task remand however maryland courts better equipped review record see discussing rules restricting review record appeal suppression decisions cf hasting stevens dissenting avoid undertaking record review functions better performed judges moreover maryland special appeals suggested officer frolich search survive reasonable suspicion test md app maryland appeals reviewed conclusion therefore agree remand appropriate justice kennedy concurring adopts prudent course explaining general rule permitting state apply first instance concurrence justice stevens however makes gratuitous observation state formidable task remand view quite contrary based present understanding record think officers conduct full accord standard police safety procedure officers remiss taken precautions comment necessary lest acquiescence impression left justice stevens views interpreted authoritative guidance application ruling facts case buie attorney asked worried danger anything like officer rozar answered app officers might done protect threats places obviously question presented facts case one answer indeed peculiarity officer frolich search appears concentrated upon part house least likely make departing officers vulnerable attack justice brennan justice marshall joins dissenting today first time extends terry ohio home dispensing fourth amendment general requirements warrant probable cause carving reasonable suspicion exception protective sweeps private dwellings terry supra held police officer may briefly detain suspect based reasonable suspicion criminal activity may conduct limited frisk suspect concealed weapons order protect personal danger deemed frisk reasonable fourth amendment light special need law enforcement officers protect prospective victims violence investigative detentions brief though far inconsiderable intrusion upon sanctity person terry early progeny permit ted brief investigative stops extremely limited searches based reasonable suspicion state place brennan concurring result recently applied rationale underlying terry wide variety intrusive searches seizures prompting continued criticism emerging tendency part convert terry decision narrow exception one swallow general rule searches reasonable based probable cause place supra brennan concurring result citations omitted today holds terry reasonable suspicion standard strikes proper balance officer safety citizen privacy protective sweeps private dwellings ante agree majority officers executing arrest warrant within private dwelling interest protecting potential ambush third parties see ante majority offers support assumption danger ambush planned home arrests approaches danger unavoidable confrontations myriad daily situations policemen citizens confront street terry supra event implicit judgment protective sweep constitutes minimally intrusive search akin involved terry markedly undervalues nature scope privacy interests involved fourth amendment protects person privacy interests variety settings physical entry home chief evil wording fourth amendment directed district eastern district michigan discounts nature intrusion believes scope intrusion limited explains protective sweep scope narrowly confined cursory visual inspection places person might hiding ante confined duration period longer necessary dispel reasonable suspicion danger event longer takes complete arrest depart premises ante spatial temporal restrictions particularly limiting protective sweep bring within police purview virtually personal possessions within house hidden view small enclosed space police officers searching potential ambushers might enter every room including basements attics open closets lockers chests wardrobes cars peer beds behind furniture officers view letters documents personal effects tables desks visible inside open drawers books records tapes pictures shelves clothing medicines toiletries paraphernalia carefully stored dresser drawers bathroom cupboards perhaps search ante protective sweep much closer limited patdown weapons frisk automobile ante nature scope intrusion sanctioned far greater upheld terry long conclusion ingredients apply balance struck terry long present case unwarranted ingredient minimally intrusive search absent holding today therefore unpalatably deviates terry progeny light special sanctity private residence highly intrusive nature protective sweep firmly believe police officers must probable cause fear personal safety threatened hidden confederate arrestee may sweep entire home given determination officers searching buie home lacked probable cause perceive danger therefore lawfully present basement affirm state decision suppress incriminating evidence respectfully dissent recently relied terry relax warrant requirements searches places new york class search car interior michigan long seizures personal effects new jersey search student purse place seizure luggage individual police officers necessarily initiate street encounters without advance planning wide variety purposes terry ohio officers choosing execute arrest warrant suspect house may minimize risk ambush example show force case least six armed officers secured premises course officers select safer venue making arrest officers arrest warrant buie probable cause believe present house authorized initial entry majority concedes nce found search buie expectation privacy remaining areas house ante fact areas necessarily exposed police buie arrest thus diminish privacy interest remaining rooms see chimel california see reason simply interference individual privacy freedom movement lawfully taken place intrusions automatically allowed despite absence warrant fourth amendment otherwise require protective sweep case may exceeded permissible temporal scope defined appeals maryland expressly noted time warrantless search buie safely outside house handcuffed unarmed md remand therefore state need decide whether reasonable suspicion standard satisfied case determine sweep basement took place police sufficient time complete arrest depart premises ante indeed protective sweep sufficiently broad scope today ruling might encourage police officers execute arrest warrants suspects homes take advantage opportunity peruse premises incriminating evidence left plain view incentive runs directly counter central tenet setting zone privacy clearly defined bounded unambiguous physical dimensions individual home zone finds roots clear specific constitutional terms payton new york decision also expand search incident arrest exception previously recognized chimel california supra allowing police officers without requisite level suspicion look closets spaces immediately adjoining place arrest attack immediately launched ante equally disquieting chimel established police officers may presume matter law without need factual support particular case arrestees might take advantage weapons destroy evidence area within immediate control therefore protective search area per se reasonable fourth amendment chimel supra find much less plausible implicit assumption today arrestees likely sprinkle hidden allies throughout rooms might arrested hence comparable justification permitting arresting officers presume matter law threatened ambush immediately adjoining spaces