arizona johnson argued december decided january terry ohio held stop frisk may conducted without violating fourth amendment ban unreasonable searches seizures two conditions met first investigatory stop temporary detention must lawful requirement met encounter police officer reasonably suspects person apprehended committing committed crime second proceed stop frisk patdown weapons officer must reasonably suspect person stopped armed dangerous duration traffic stop recently confirmed police officer effectively seizes everyone vehicle driver passengers brendlin california patrolling near tucson neighborhood associated crips gang police officers serving arizona gang task force stopped automobile vehicular infraction warranting citation time stop officers reason suspect car occupants criminal activity officer trevizo attended respondent johnson passenger whose behavior clothing caused trevizo question learning johnson town crips gang prison trevizo asked get car order question hearing passenger gang affiliation suspected armed patted safety exited car patdown felt butt gun point johnson began struggle trevizo handcuffed johnson charged inter alia possession weapon prohibited possessor trial denied motion suppress evidence concluding stop lawful trevizo cause suspect johnson armed dangerous johnson convicted arizona appeals reversed recognizing johnson lawfully seized found prior frisk detention evolved consensual conversation gang affiliation trevizo therefore concluded right pat johnson even reason suspect armed dangerous arizona denied review held officer trevizo patdown johnson violate fourth amendment prohibition unreasonable searches seizures pp terry established investigatory stop based reasonably grounded suspicion criminal activity police must positioned act instantly reasonable cause suspect persons temporarily detained armed dangerous limited search outer clothing weapons serves protect officer public patdown constitutional traffic stops resemble duration atmosphere kind brief detention authorized terry berkemer mccarty especially fraught danger police officers michigan long may minimize risk harm exercising command situation maryland wilson three decisions cumulatively portray terry application setting pennsylvania mimms per curiam held motor vehicle lawfully detained traffic violation police officers may order driver get vehicle without violating fourth amendment government legitimate weighty interest officer safety outweighs de minimis additional intrusion requiring driver already lawfully stopped exit vehicle citing terry held driver outside stopped vehicle may patted weapons officer reasonably concludes driver might armed dangerous wilson held mimms rule applies passengers well drivers based weighty interest officer safety brendlin held passenger seized driver moment car stopped police comes halt side road passenger motivation use violence stop prevent apprehension crime grave traffic violation great driver passengers already stopped virtue stop vehicle additional intrusion passenger minimal pp arizona appeals recognized initially johnson lawfully detained incident legitimate stop vehicle passenger concluded officer trevizo began questioning matter unrelated traffic stop patdown authority ceased exist absent reasonable suspicion johnson engaged engage criminal activity portrayed interrogation consensual johnson emphasizes trevizo testified johnson refused exit vehicle submit patdown trevizo also testified never advised johnson answer questions otherwise cooperate lawful roadside stop begins vehicle pulled investigation traffic violation temporary seizure driver passengers ordinarily continues remains reasonable duration stop normally stop ends police need control scene inform driver passengers free leave officer inquiries matters unrelated justification traffic stop convert encounter something lawful seizure long inquiries measurably extend stop duration see muehler mena reasonable passenger understand time car lawfully stopped free terminate encounter police move nothing occurred case conveyed johnson prior frisk traffic stop ended otherwise free depart without police permission brendlin trevizo required fourth amendment give johnson opportunity depart without first ensuring permitting dangerous person get behind pp reversed remanded ginsburg delivered opinion unanimous arizona petitioner lemon montrea johnson writ certiorari appeals arizona division two january justice ginsburg delivered opinion case concerns authority police officers stop frisk passenger motor vehicle temporarily seized upon police detection traffic infraction pathmarking decision terry ohio considered whether investigatory stop temporary detention frisk patdown weapons may conducted without violating fourth amendment ban unreasonable searches seizures upheld stop frisk constitutionally permissible two conditions met first investigatory stop must lawful requirement met encounter terry determined police officer reasonably suspects person apprehended committing committed criminal offense second proceed stop frisk police officer must reasonably suspect person stopped armed dangerous duration traffic stop recently confirmed police officer effectively seizes everyone vehicle driver passengers brendlin california accordingly hold setting first terry condition lawful investigatory stop met whenever lawful police detain automobile occupants pending inquiry vehicular violation police need addition cause believe occupant vehicle involved criminal activity justify patdown driver passenger traffic stop however case pedestrian reasonably suspected criminal activity police must harbor reasonable suspicion person subjected frisk armed dangerous april officer maria trevizo detectives machado gittings members arizona gang task force patrol tucson near neighborhood associated crips gang approximately officers pulled automobile license plate check revealed vehicle registration suspended violation arizona law violation vehicle stopped constituted civil infraction warranting citation time stop vehicle three occupants driver passenger passenger back seat lemon montrea johnson respondent making stop officers reason suspect anyone vehicle criminal activity see app three officers left patrol car approached stopped vehicle machado instructed occupants keep hands visible asked whether weapons vehicle responded machado directed driver get car gittings dealt passenger stayed vehicle throughout stop see machado getting driver license information vehicle registration insurance see trevizo attended johnson trevizo noticed police approached johnson looked back kept eyes officers drew near observed johnson wearing clothing including blue bandana considered consistent crips membership also noticed scanner johnson jacket pocket struck highly unusual cause concern people carry around scanner way unless going involved kind criminal activity going try evade police listening scanner response trevizo questions johnson provided name date birth said identification volunteered eloy arizona place trevizo knew home crips gang johnson told trevizo served time prison burglary year app trevizo wanted question johnson away passenger gain intelligence gang johnson might app reason asked get car ibid johnson complied based trevizo observations johnson answers questions still seated car trevizo suspected might weapon exited vehicle therefore patted officer safety ibid patdown trevizo felt butt gun near johnson waist point johnson began struggle trevizo placed handcuffs ibid johnson charged state inter alia possession weapon prohibited possessor moved suppress evidence fruit unlawful search trial denied motion concluding stop lawful trevizo cause suspect johnson armed dangerous see app jury convicted johnson charge see divided panel arizona appeals reversed johnson conviction recognizing johnson lawfully seized officers stopped car nevertheless concluded prior frisk detention evolved separate consensual encounter stemming unrelated investigation trevizo johnson possible gang affiliation absent reason believe johnson involved criminal activity arizona appeals held trevizo right pat weapons even reason suspect armed dangerous ibid judge espinosa dissented found highly unrealistic conclude merely trevizo courteous johnson cooperative ongoing virtually simultaneous chain events somehow consensual encounter short moments involved throughout episode stressed johnson remained seized part valid traffic stop ibid maintained trevizo reasonable basis consider johnson dangerous therefore ensure safety others scene patting johnson weapons arizona denied review lexis granted certiorari reverse judgment arizona appeals ii begin consideration constitutionality officer trevizo patdown johnson looking back leading decision terry ohio terry involved stop interrogation men whose conduct attracted attention patrolling police officer officer observation led reasonably suspect men casing jewelry shop preparation robbery conducted patdown disclosed weapons concealed men overcoat pockets upheld lower courts determinations interrogation warranted patdown permissible see terry established legitimacy investigatory stop situations police may lack probable cause arrest stop justified suspicion reasonably grounded short probable cause criminal activity afoot explained police officer must positioned act instantly reasonable suspicion persons temporarily detained armed dangerous ibid recognizing limited search outer clothing weapons serves protect officer public held patdown reasonable fourth amendment ost traffic stops observed resemble duration atmosphere kind brief detention authorized terry berkemer mccarty furthermore recognized traffic stops especially fraught danger police officers michigan long risk harm police occupants stopped vehicle minimized stressed officers routinely exercise unquestioned command situation maryland wilson quoting michigan summers see brendlin three decisions cumulatively portray terry application setting pennsylvania mimms per curiam maryland wilson brendlin california mimms held motor vehicle lawfully detained traffic violation police officers may order driver get vehicle without violating fourth amendment proscription unreasonable searches seizures government legitimate weighty interest officer safety said outweighs de minimis additional intrusion requiring driver already lawfully stopped exit vehicle citing terry controlling held driver outside stopped vehicle may patted weapons officer reasonably concludes driver might armed presently dangerous wilson held mimms rule applied passengers well drivers specifically instructed officer making traffic stop may order passengers get car pending completion stop weighty interest officer safety observed present regardless whether occupant stopped car driver passenger true acknowledged lawful traffic stop probable cause believe driver committed minor vehicular offense reason stop detain passengers ibid hand emphasized risk violent encounter setting stems ordinary reaction motorist stopped speeding violation fact evidence serious crime might uncovered stop motivation passenger employ violence prevent apprehension crime stated every bit great driver ibid moreover noted practical matter passengers already stopped virtue stop vehicle additional intrusion passenger minimal completing picture brendlin held passenger seized driver moment car stopped police comes halt side road passenger therefore standing challenge stop constitutionality wilson brendlin stated dictum officers conduct routine traffic stop may perform driver passengers upon reasonable suspicion may armed dangerous knowles iowa forecast confirm accurately captures combined thrust decisions mimms wilson brendlin arizona appeals recognized initially johnson lawfully detained incident legitimate stop vehicle passenger see concluded officer trevizo undertook question johnson matter unrelated traffic stop johnson gang affiliation patdown authority ceased exist absent reasonable suspicion johnson engaged engage criminal activity see support arizona portrayal trevizo interrogation johnson consensual johnson emphasizes trevizo testimony suppression hearing responding prosecutor questions trevizo affirmed belief johnson refused get car turn around pat app clear prosecutor opposing suppression motion sought portray episode consensual cf florida bostick holding police officers search bus passenger luggage based consent event trevizo also testified never advised johnson answer questions otherwise cooperate see app trevizo disagree defense counsel asked fact seeking johnson permission dissenting judge observed consensual unrealistic characterization interaction encounter took place within minutes stop patdown followed within mere moments johnson exit vehicle beyond genuine debate point johnson felt free leave yet occurred see lawful roadside stop begins vehicle pulled investigation traffic violation temporary seizure driver passengers ordinarily continues remains reasonable duration stop normally stop ends police need control scene inform driver passengers free leave see brendlin officer inquiries matters unrelated justification traffic stop made plain convert encounter something lawful seizure long inquiries measurably extend duration stop see muehler mena sum stated brendlin traffic stop car communicates reasonable passenger free terminate encounter police move see nothing occurred case conveyed johnson prior frisk traffic stop ended otherwise free depart without police permission ibid officer trevizo surely constitutionally required give johnson opportunity depart scene exited vehicle without first ensuring permitting dangerous person get behind reasons stated judgment arizona appeals reversed case remanded proceedings inconsistent opinion ordered footnotes appeals majority assert johnson reasonably felt free leave instead said reasonable person johnson position felt free remain vehicle position however appears odds decision maryland wilson see supra arizona appeals assumed without deciding trevizo reasonable suspicion johnson armed dangerous foreclose appeals consideration issue remand