dionisio argued november decided january grand jury subpoenaed persons including respondent give voice exemplars identification purposes respondent fourth fifth amendment grounds refused comply district rejected claims adjudged respondent contempt appeals agreed rejecting respondent fifth amendment claim reversed ground fourth amendment required preliminary showing reasonableness grand jury witness compelled furnish voice exemplar proposed seizures unreasonable large number witnesses subpoenaed produce exemplars held compelled production voice exemplars violate fifth amendment privilege compulsory since used identification purposes testimonial communicative content utterances pp respondent fourth amendment claim also invalid pp subpoena compel person appear grand jury constitute seizure within meaning fourth amendment fact many others besides respondent ordered give voice recordings render subpoena unconstitutional davis mississippi distinguished pp grand jury directive make voice recording infringed valid fourth amendment interest pp since neither summons appear grand jury directive give voice exemplar contravened fourth amendment appeals erred requiring preliminary showing reasonableness respondent compelled furnish exemplar pp stewart delivered opinion burger white blackmun powell rehnquist joined brennan filed opinion concurring part dissenting part post douglas post marshall post filed dissenting opinions philip lacovara argued cause brief solicitor general griswold assistant attorney general petersen wm bradford reynolds beatrice rosenberg sidney glazer john powers crowley argued cause filed brief respondent justice stewart delivered opinion special grand jury convened northern district illinois february investigate possible violations federal criminal statutes relating gambling course investigation grand jury received evidence certain voice recordings obtained pursuant orders grand jury subpoenaed approximately persons including respondent dionisio seeking obtain voice exemplars comparison recorded conversations received evidence witness advised potential defendant criminal prosecution asked examine transcript intercepted conversation go nearby office attorney read transcript recording device witnesses advised allowed attorneys present read transcripts dionisio witnesses refused furnish voice exemplars asserting disclosures violate rights fourth fifth amendments government filed separate petitions district compel dionisio witnesses furnish voice exemplars grand jury petitions stated exemplars essential necessary grand jury investigation used solely standard comparison order determine whether witness person whose voice intercepted following hearing district judge rejected witnesses constitutional arguments ordered comply grand jury request reasoned voice exemplars like handwriting exemplars fingerprints testimonial communicative evidence consequently order produce compel witness testify district judge also found fourth amendment violation grand jury subpoena violate fourth amendment order produce voice exemplars involve unreasonable search seizure within proscription amendment witnesses lawfully grand jury pursuant subpoena fourth amendment prohibition unreasonable search seizure applies identifying physical characteristics fingerprints obtained result unlawful detention suspect intrusion body blood test undertaken without warrant absent emergency situation davis mississippi schmerber california appeals seventh circuit reversed agreed district rejecting fifth amendment claims concluded compel voice recordings violate fourth amendment view grand jury seeking obtain voice exemplars witnesses use subpoena powers probable cause exist arrest less unusual method compelling production exemplars found fourth amendment applied grand jury process fourth amendment law enforcement officials may compel production physical evidence absent showing reasonableness seizure davis mississippi ibid davis held error admit petitioner fingerprints evidence trial rape obtained police detention following lawless wholesale roundup petitioner youths equating procedures followed grand jury present case fingerprint detentions davis appeals reasoned dragnet effect approximately twenty persons subpoenaed purposes identification invidious effect fourth amendment rights practice condemned davis view clear conflict decision one appeals second circuit granted government petition certiorari appeals correctly rejected contention compelled production voice exemplars violate fifth amendment long held compelled display identifiable physical characteristics infringes interest protected privilege compulsory holt justice holmes writing dismissed extravagant extension fifth amendment argument violated privilege require defendant put blouse identification purposes explained prohibition compelling man criminal witness prohibition use physical moral compulsion extort communications exclusion body evidence may material recently schmerber california relied holt noted oth federal state courts usually held privilege offers protection compulsion submit fingerprinting photographing measurements write speak identification appear stand assume stance walk make particular gesture distinction emerged often expressed different ways privilege bar compelling communications testimony compulsion makes suspect accused source real physical evidence violate omitted cases led us conclude gilbert california handwriting exemplars protected privilege compulsory ne voice handwriting course means communication held mere handwriting exemplar contrast content written like voice body identifying physical characteristic outside protection similarly wade found error compelling defendant accused bank robbery utter lineup words allegedly spoken robber accused required use voice identifying physical characteristic speak guilt wade gilbert definitively refute contention compelled production voice exemplars case violate fifth amendment voice recordings used solely measure physical properties witnesses voices testimonial communicative content said ii appeals held fourth amendment required preliminary showing reasonableness grand jury witness compelled furnish voice exemplar case proposed seizures voice exemplars unreasonable large number witnesses summoned grand jury directed produce exemplars disagree fourth amendment guarantees people shall secure persons houses papers effects unreasonable searches seizures fourth amendment violation present setting must rest lawless governmental intrusion upon privacy persons rather interference property relationships private papers schmerber california see doe schwartz terry ohio explained protection afforded persons terms statement katz fourth amendment protects people places concluded wherever individual may harbor reasonable expectation privacy entitled free unreasonable governmental intrusion terry ohio supra made clear schmerber supra obtaining physical evidence person involves potential fourth amendment violation two different levels seizure person necessary bring contact government agents see davis mississippi subsequent search seizure evidence schmerber found initial seizure accused justified lawful arrest subsequent seizure blood sample body reasonable light exigent circumstances terry concluded neither initial seizure person investigatory stop policeman subsequent search patdown outer clothing weapons constituted violation fourth fourteenth amendments constitutionality compulsory production exemplars grand jury witness necessarily turns dual inquiry whether either initial compulsion person appear grand jury subsequent directive make voice recording unreasonable seizure within meaning fourth amendment clear subpoena appear grand jury seizure fourth amendment sense even though summons may inconvenient burdensome last term acknowledged long recognized itizens generally constitutionally immune grand jury subpoenas branzburg hayes concluded although powers grand jury unlimited subject supervision judge longstanding principle public right every man evidence except persons protected constitutional statutory privilege bryan blackmer wigmore evidence mcnaughton rev particularly applicable grand jury proceedings compulsion exerted grand jury subpoena differs seizure effected arrest even investigative stop civic obligation judge friendly wrote appeals second circuit latter abrupt effected force threat often demeaning circumstances case arrest results record involving social stigma subpoena served manner legal process involves stigma whatever time appearance inconvenient generally altered remains times control supervision doe schwartz case thus quite different davis mississippi supra appeals primarily relied davis initial seizure lawless dragnet detention violated fourth fourteenth amendments taking fingerprints noted nvestigatory seizures subject unlimited numbers innocent persons harassment ignominy incident involuntary detention left open question whether consistently fourth fourteenth amendments narrowly circumscribed procedures might developed obtaining fingerprints people probable cause arrest davis plainly inapposite case initial restraint infringe fourth amendment say grand jury subpoena talisman dissolves constitutional protections grand jury require witness testify require production person private books records incriminate see boyd fourth amendment provides protection grand jury subpoena duces tecum sweeping terms regarded reasonable hale henkel cf oklahoma press publishing walling last term context first amendment claim indicated constitution tolerate transformation grand jury instrument oppression official harassment press undertaken purposes law enforcement disrupt reporter relationship news sources justification grand juries subject judicial control subpoenas motions quash expect courts forget grand juries must operate within limits first amendment well fifth branzburg hayes see also powell concurring faced constitutional infirmities subpoena appear grand jury order make voice recordings said valid fifth amendment claim order produce private books papers sweeping subpoena duces tecum even branzburg extended beyond first amendment moorings tied generalized due process concept still indication case kind harassment concern appeals found critical significance fact grand jury summoned approximately witnesses furnish voice exemplars think fact basically irrelevant constitutional issues grand jury may attempting identify number voices tapes evidence might summoned witnesses effort identify one voice whatever case grand jury investigation fully carried every available clue run witnesses examined every proper way find crime committed stone see also wood georgia recalled last term task inquire existence possible criminal conduct return indictments investigative powers necessarily broad branzburg hayes supra grand jury may well find desirable call numerous witnesses course investigation follow witness may resist subpoena ground many witnesses called neither order dionisio appear order make voice recording rendered unreasonable fact many others subjected compulsion conclusion dionisio compulsory appearance grand jury unreasonable seizure answer first part fourth amendment inquiry dionisio argues grand jury subsequent directive make voice recording infringement rights fourth amendment accept argument katz supra said fourth amendment provides protection person knowingly exposes public even home office physical characteristics person voice tone manner opposed content specific conversation constantly exposed public like man facial characteristics handwriting voice repeatedly produced others hear person reasonable expectation others know sound voice reasonably expect face mystery world appeals second circuit stated except rare recluse chooses live life complete solitude daily lives constantly speak write content communication entitled fourth amendment protection underlying identifying characteristics constant factor throughout public private communications open see hear basis constructing wall privacy grand jury exist casual contacts strangers hence intrusion individual privacy results compelled execution handwriting voice exemplars nothing exposed grand jury previously exposed public large doe schwartz since neither summons appear grand jury directive make voice recording infringed upon interest protected fourth amendment justification requiring grand jury satisfy even minimal requirement reasonableness imposed appeals see doe schwartz supra grand jury broad investigative powers determine whether crime committed committed jurors may act tips rumors evidence offered prosecutor personal knowledge branzburg hayes grand jury witness entitled set limits investigation grand jury may conduct blair sufficient basis indictment may emerge end investigation evidence received impossible conceive examination witnesses must stopped basis laid indictment formally preferred object examination ascertain shall indicted hale henkel fifth amendment guarantees civilian may brought trial infamous crime unless presentment indictment grand jury constitutional guarantee presupposes investigative body acting independently either prosecuting attorney judge stirone whose mission clear innocent less bring trial may guilty holding saddle grand jury minitrials preliminary showings assuredly impede investigation frustrate public interest fair expeditious administration criminal laws cf ryan costello cobbledick grand jury may always serve historic role protective bulwark standing solidly ordinary citizen overzealous prosecutor even approach proper performance constitutional mission must free pursue investigations unhindered external influence supervision long trench upon legitimate rights witness called since appeals found unreasonable search seizure none existed imposed preliminary showing reasonableness none required judgment reversed case remanded proceedings consistent opinion ordered dissenting opinion justice douglas see post dissenting opinion justice marshall see post footnotes decision district unreported life special grand jury months extended additional months also rejected argument grand jury procedure violated witnesses sixth amendment right counsel found contention particularly without merit view option afforded witnesses attorneys present made voice recordings doe schwartz affirming civil contempt judgment grand jury witness refusal furnish handwriting exemplars appeals seventh circuit appears recanted somewhat clear correct holding present case compelled production voice exemplars violate privilege compulsory subsequently explaining holding qualified nevertheless witnesses potential defendants since purpose voice exemplars identify voices obtained fbi agents pursuant wiretap impact compelled exemplars clear thus compelled exemplars odds spirit fifth amendment fifth amendment illuminates fourth see boyd fourth amendment violation appears readily immunity granted dionisio immunity yet granted fraser see generally kastigar blair wigmore evidence mcnaughton rev obligation appear different person may subject grand jury inquiry see doe schwartz winter judge weinfeld correctly characterized davis another application principle fourth amendment applies searches seizures person matter scope duration held circumstances presented detention sole purpose fingerprinting violation fourth amendment ban unreasonable search seizure thom new york stock exchange supp omitted see also allen cupp boyd concerned motion produce invoices forfeiture trial treated equivalent subpoena duces tecum hale henkel applied boyd context grand jury subpoena noted supra valid comparison detentions youths davis grand jury subpoenas witnesses dragnet detentions police constitute substantial intrusions fourth fourteenth amendment rights youths davis person justifiable expectation immunity grand jury subpoena grand jury grand inquest body powers investigation inquisition scope whose inquiries limited narrowly questions propriety forecasts probable result investigation doubts whether particular individual found properly subject accusation crime said identity offender precise nature offense one normally developed conclusion grand jury labors beginning hendricks blair hale henkel found standard met noted supra case fourth amendment infringed overly broad subpoena produce books papers justice marshall dissent post suggests preliminary showing reasonableness required grand jury subpoenas witness appear produce handwriting voice exemplars subpoenas appear testify distinction finds support constitution dissent argues potential fourth amendment violation case subpoenaed grand jury witness asserted intrusiveness initial subpoena appear possible stigma grand jury appearance inconvenience official restraint initial directive appear intrusive witness called simply testify summoned produce physical evidence institution adopted country continued considerations similar give chief value england designed means bringing trial persons accused public offences upon grounds also means protecting citizen unfounded accusation whether comes government prompted partisan passion private enmity person shall required according fundamental law country except cases mentioned answer higher crimes unless body consisting less sixteen good lawful men selected body district shall declare upon careful deliberation solemnity oath good reason accusation trial ex parte bain quoting grand jury charge justice field see also wood georgia possibilities delay caused requiring initial showings reasonableness illustrated appeals subsequent decision september grand jury rev sub nom mara post held government required show adversary hearing request exemplars reasonable reasonableness included proof exemplars obtained sources