nix williams argued january decided june following disappearance girl des moines iowa respondent arrested arraigned davenport iowa police informed respondent counsel drive respondent back des moines without questioning trip one officers began conversation respondent ultimately resulted making incriminating statements directing officers child body systematic search area conducted aid volunteers initiated respondent made incriminating statements terminated respondent guided police body trial iowa state murder denied respondent motion suppress evidence body related evidence including body condition shown autopsy respondent contended evidence fruit illegally obtained statements made automobile ride respondent convicted iowa affirmed later habeas corpus proceedings ultimately resulted holding police obtained respondent incriminating statements interrogation violation sixth amendment right counsel brewer williams however noted even though statements admitted second trial evidence body location condition might admissible theory body discovered even incriminating statements elicited respondent respondent second trial incriminating statements offered evidence prosecution seek show respondent directed police child body however evidence concerning body location condition admitted concluded state proved search continued body discovered within short time essentially condition actually found respondent convicted murder iowa affirmed subsequent habeas corpus proceedings federal district denying relief also concluded body inevitably found however appeals reversed holding even assuming inevitable discovery exception exclusionary rule state met exception requirement proved police act bad faith held evidence pertaining discovery condition victim body properly admitted respondent second trial ground ultimately inevitably discovered even violation constitutional provision taken place pp core rationale extending exclusionary rule evidence fruit unlawful police conduct course needed deter police violations constitutional statutory protections notwithstanding high social cost letting obviously guilty persons go unpunished rationale prosecution put better position illegality transpired contrast independent source doctrine allowing admission evidence discovered means wholly independent constitutional violation rests rationale society interest deterring unlawful police conduct public interest juries receive probative evidence crime properly balanced putting police worse position police error misconduct occurred although independent source doctrine apply rationale wholly consistent justifies adoption ultimate inevitable discovery exception exclusionary rule prosecution establish preponderance evidence information ultimately inevitably discovered lawful means volunteers search deterrence rationale little basis evidence received pp inevitable discovery exception prosecution required prove absence bad faith since requirement result withholding juries relevant undoubted truth available police absent unlawful police activity put police worse position unlawful conduct transpired fail take account enormous societal cost excluding truth search truth administration justice significant disincentives obtaining evidence illegally including possibility departmental discipline civil liability lessen likelihood ultimate inevitable discovery exception promote police misconduct pp merit respondent contention waive right assistance counsel sixth amendment exclusionary rule designed protect right fair trial competing values may balanced deciding whether challenged evidence properly admitted exclusion physical evidence inevitably discovered adds nothing either integrity fairness criminal trial suppression ensure fairness theory tends safeguard adversary system justice pp record supports finding search party ultimately inevitably discovered victim body evidence clearly shows searchers approaching actual location body search resumed respondent led police body body inevitably found pp burger delivered opinion white blackmun powell rehnquist joined white filed concurring opinion post stevens filed opinion concurring judgment post brennan filed dissenting opinion marshall joined post brent appel deputy attorney general iowa argued cause petitioner briefs thomas miller attorney general thomas mcgrane assistant attorney general kathryn oberly argued cause amicus curiae urging reversal brief solicitor general lee assistant attorney general trott deputy solicitor general frey joel gershowitz robert bartels appointment argued cause filed briefs respondent james duggan filed brief national legal aid defender association amicus curiae urging affirmance briefs amici curiae filed state illinois et al neil hartigan attorney general illinois paul biebel first assistant attorney general steven molo assistant attorney general attorneys general respective jurisdictions follows charles graddick alabama norman gorsuch alaska robert corbin arizona duane woodard colorado charles oberly iii delaware jim smith florida michael bowers georgia tany hong hawaii jim jones idaho linley pearson indiana robert stephan kansas steven beshear kentucky william guste louisiana james tierney maine stephen sachs maryland frank kelley michigan hubert humphrey iii minnesota william allain mississippi michael greely montana paul douglas nebraska brian mckay nevada gregory smith new hampshire rufus edmisten north carolina robert wefald north dakota michael turpen oklahoma leroy zimmerman pennsylvania hector reichard puerto rico travis medlock south carolina mark meierhenry south dakota william leech tennessee david wilkinson utah john easton vermont gerald baliles virginia kenneth eikenberry washington chauncey browning west virginia bronson la follette wisconsin archie mcclintock wyoming legal foundation america et al david crump wayne schmidt james manak chief justice burger delivered opinion granted certiorari consider whether respondent williams second murder trial state evidence pertaining discovery condition victim body properly admitted ground ultimately inevitably discovered even violation constitutional statutory provision taken place december pamela powers disappeared ymca building des moines iowa accompanied parents watch athletic contest shortly disappeared williams seen leaving ymca carrying large bundle wrapped blanket boy helped williams open car door reported seen two legs skinny white williams car found next day miles east des moines davenport iowa later several items clothing belonging child williams clothing army blanket like one used wrap bundle williams carried ymca found rest stop interstate near grinnell des moines davenport warrant issued williams arrest police surmised williams left pamela powers body somewhere des moines grinnell rest stop young girl clothing found december iowa bureau criminal investigation initiated search two hundred volunteers divided teams began search miles east grinnell covering area several miles north south interstate moved westward poweshiek county grinnell located jasper county searchers instructed check roads abandoned farm buildings ditches culverts place body small child hidden meanwhile williams surrendered local police davenport promptly arraigned williams contacted des moines attorney arranged attorney davenport meet williams davenport police station des moines police informed counsel pick williams davenport return des moines without questioning two des moines detectives drove davenport took williams custody proceeded drive back des moines return trip one policemen detective leaming began conversation williams saying want give something think traveling road predicting several inches snow tonight feel person knows little girl body get snow top may unable find since going right past area body way des moines feel stop locate body parents little girl entitled christian burial little girl snatched away christmas murdered fter snow storm may able find later police car approached grinnell williams asked leaming whether police found young girl shoes leaming replied unsure williams directed police point near service station said left shoes found continued drive des moines williams asked whether blanket found directed officers rest area grinnell said disposed blanket find blanket point leaming party joined officers charge search approached mitchellville williams without conversation agreed direct officers child body officers directing search called search left grinnell police department join leaming rest area time one search team near jasper county line two miles williams soon guided leaming party body child body found next culvert ditch beside gravel road polk county two miles south interstate essentially within area searched first trial jury found williams guilty murder judgment conviction affirmed iowa state williams williams sought release habeas corpus district southern district iowa concluded evidence question wrongly admitted williams trial williams brewer supp divided panel appeals eighth circuit agreed granted certiorari divided affirmed holding detective leaming obtained incriminating statements williams viewed interrogation violation right counsel brewer williams opinion noted however although williams incriminating statements introduced evidence second trial evidence body location condition might well admissible theory body discovered event even incriminating statements elicited williams second trial finding body discovered essentially condition actually found noted freezing temperatures prevailed tissue deterioration suspended challenged evidence admitted jury found williams guilty murder sentenced life prison appeal iowa affirmed held fact hypothetical independent source exception exclusionary rule defendant shown unlawful conduct part police state burden show preponderance evidence police act bad faith purpose hastening discovery evidence question evidence question discovered lawful means issue propriety police conduct case noted earlier opinion caused closest possible division views every appellate considered question light legitimate disagreement among individuals well versed law criminal procedure given opportunity calm deliberation said actions police taken bad faith williams renewed attack conviction seeking writ habeas corpus district southern district iowa district conducted independent review evidence concluded state courts body inevitably found searchers essentially condition williams led police discovery district denied williams petition supp appeals eighth circuit reversed equally divided denied rehearing en banc assumed without deciding inevitable discovery exception exclusionary rule iowa correctly stated exception require proof police act bad faith evidence discovered absent constitutional violation reversing district denial habeas relief appeals stated hold state met first requirement therefore unnecessary decide whether state courts finding body discovered anyway fairly supported record also unnecessary decide whether state must prove two elements exception clear convincing evidence defendant argues preponderance evidence state courts held state trial denying motion suppress made finding one way question bad faith opinion even mention issue seems proceed assumption contrary rule law later laid iowa state needed show body discovered event iowa expressly address issue finding appellate state entitled presumption correctness attaches findings conclude however state finding police act bad faith entitled shield footnotes omitted ii iowa correctly stated vast majority courts state federal recognize inevitable discovery exception exclusionary rule urged adopt apply ultimate inevitable discovery exception exclusionary rule williams contends evidence body location condition fruit poisonous tree fruit product detective leaming plea help child parents give christian burial already held equated interrogation contends admitting challenged evidence violated sixth amendment whether inevitably discovered williams also contends inevitable discovery doctrine constitutionally permissible must include threshold showing police good faith doctrine requiring courts suppress evidence tainted fruit unlawful governmental conduct genesis silverthorne lumber held exclusionary rule applies illegally obtained evidence also incriminating evidence derived primary evidence holding silverthorne carefully limited however emphasized information automatically become sacred inaccessible knowledge facts gained independent source may proved like others ibid emphasis added need hold evidence fruit poisonous tree simply come light illegal actions police rather apt question case whether granting establishment primary illegality evidence instant objection made come exploitation illegality instead means sufficiently distinguishable purged primary taint emphasis added quoting maguire evidence guilt although silverthorne wong sun involved violations fourth amendment fruit poisonous tree doctrine limited cases fourth amendment violation applied doctrine violations sixth amendment see wade well fifth amendment core rationale consistently advanced extending exclusionary rule evidence fruit unlawful police conduct admittedly drastic socially costly course needed deter police violations constitutional statutory protections accepted argument way ensure protections exclude evidence seized result violations notwithstanding high social cost letting persons obviously guilty go unpunished crimes rationale prosecution put better position illegality transpired contrast derivative evidence analysis ensures prosecution put worse position simply earlier police error misconduct independent source doctrine allows admission evidence discovered means wholly independent constitutional violation doctrine although closely related inevitable discovery doctrine apply williams statements leaming indeed led police child body whole story independent source doctrine teaches us interest society deterring unlawful police conduct public interest juries receive probative evidence crime properly balanced putting police worse position police error misconduct occurred see murphy waterfront new york harbor kastigar challenged evidence independent source exclusion evidence put police worse position absent error violation functional similarity two doctrines exclusion evidence inevitably discovered also put government worse position police obtained evidence misconduct taken place thus independent source exception justify admission evidence case rationale wholly consistent justifies adoption ultimate inevitable discovery exception exclusionary rule clear cases implementing exclusionary rule begin premise challenged evidence sense product illegal governmental activity crews emphasis added course end inquiry prosecution establish preponderance evidence information ultimately inevitably discovered lawful means volunteers search deterrence rationale little basis evidence received anything less reject logic experience common sense requirement prosecution must prove absence bad faith imposed appeals place courts position withholding juries relevant undoubted truth available police absent unlawful police activity course view put police worse position unlawful conduct transpired equal importance wholly fails take account enormous societal cost excluding truth search truth administration justice nothing prior holdings supports formalistic pointless punitive approach appeals concluded without analysis requirement imposed temptation risk deliberate violations sixth amendment great deterrent effect exclusionary rule reduced far reject view police officer faced opportunity obtain evidence illegally rarely ever position calculate whether evidence sought inevitably discovered cf ceccolini concept effective deterrence assumes police officer consciously realizes probable consequences presumably impermissible course conduct opinion concurring judgment williams contends waive right assistance counsel may balance competing values deciding whether challenged evidence properly admitted argues unlike exclusionary rule fourth amendment context essential purpose deter police misconduct sixth amendment exclusionary rule designed protect right fair trial integrity factfinding process williams contends interests stake societal costs excluding evidence obtained responses presumed involuntary irrelevant determining whether evidence excluded disagree exclusion physical evidence inevitably discovered adds nothing either integrity fairness criminal trial sixth amendment right counsel protects unfairness preserving adversary process reliability proffered evidence may tested see ash schneckloth bustamonte however detective leaming conduct nothing impugn reliability evidence question body child condition found articles clothing found body autopsy one seriously contend presence counsel police car leaming appealed williams decent human instincts bearing reliability body evidence suppression circumstances nothing whatever promote integrity trial process inflict wholly unacceptable burden administration criminal justice suppression ensure fairness theory tends safeguard adversary system justice assure fairness trial proceedings held assistance counsel must available pretrial confrontations subsequent trial cure otherwise confrontation prosecuting authorities uncounseled defendant ash supra fairness assured placing state accused positions impermissible conduct taken place however government prove evidence obtained inevitably therefore admitted regardless overreaching police rational basis keep evidence jury order ensure fairness trial proceedings situation state gained advantage trial defendant suffered prejudice indeed suppression evidence operate undermine adversary system putting state worse position occupied without police misconduct williams argument inevitable discovery constitutes impermissible balancing values without merit half century ago judge later justice cardozo made seminal observation exclusionary rule criminal go free constable blundered people defore prophetically went consider effect upon society exclusionary rule pettiest peace officer power overzeal indiscretion confer immunity upon offender crimes flagitious appeals find necessary consider whether record fairly supported finding volunteer search party ultimately inevitably discovered victim body however three courts independently reviewing evidence found body child inevitably found searchers williams challenges findings asserting record contains post hoc rationalization search efforts proceeded two miles polk county williams led police body challenge made suppression hearing preceding williams second trial prosecution offered testimony agent ruxlow iowa bureau criminal investigation ruxlow organized directed volunteers searching child body tr hearings motion suppress state williams cr may searchers instructed check roads ditches culverts came upon abandoned farm buildings instructed go onto property search abandoned farm buildings places small child secreted ruxlow testified marked highway maps poweshiek jasper counties grid fashion divided volunteers teams four six persons assigned team search specific grid areas ruxlow also testified search suspended williams promised cooperation continued polk county using grid system although previously marked grids highway maps poweshiek jasper counties ruxlow obtained map polk county said marked manner necessary search continue search commenced approximately moved westward poweshiek county jasper county approximately williams volunteered cooperate police detective leaming police car williams sent word ruxlow special agent directing search meet grinnell truck stop search suspended time ruxlow also stated impression possibility williams lead child body time search resumed learned williams led police body found two miles search stopped easternmost grid searched polk county testimony taken additional three five hours discover body search continued body found near culvert one kinds places teams specifically directed search record clear search parties approaching actual location body satisfied along three courts earlier volunteer search teams resumed search williams earlier led police body body inevitably found evidence asserted williams newly discovered certain photographs body deposition testimony agent ruxlow made connection federal habeas proceeding demonstrate material facts inadequately developed suppression hearing state williams denied full fair adequate opportunity present relevant facts suppression hearing judgment appeals reversed case remanded proceedings consistent opinion ordered footnotes every federal appeals jurisdiction criminal matters including eighth circuit case decided instant case endorsed inevitable discovery doctrine see wayne app cert denied bienvenue fisher government virgin islands gereau cert denied seohnlein cert denied brookins papp jago ex rel owens twomey apker schmidt cert denied romero roper murphy waterfront new york harbor held state witness may compelled give testimony may incriminating federal law unless compelled testimony fruits used manner federal officials connection criminal prosecution added however nce defendant demonstrates testified state grant immunity matters related federal prosecution federal authorities burden showing evidence tainted establishing independent legitimate source disputed evidence see white concurring application independent source doctrine fifth amendment context reaffirmed kastigar ultimate inevitable discovery exception exclusionary rule closely related purpose rule chapman california rule serve useful purpose insofar block setting aside convictions small errors defects little likelihood changed result trial purpose inevitable discovery rule block setting aside convictions obtained without police misconduct quantum proof already established relevant guidelines matlock emphasis added stated controlling burden proof suppression hearings impose greater burden proof preponderance evidence lego twomey observed experience substantial evidence accumulated federal rights suffered determining admissibility preponderance evidence held prosecution must prove preponderance evidence confession sought used trial voluntary unwilling impose added burdens already difficult task proving guilt criminal cases enlarging barrier placing evidence unquestioned truth juries williams argues standard used iowa courts inconsistent wade requiring clear convincing evidence independent source identification gave weight effect uncounseled pretrial identification crystalliz ing witnesses identification defendant future reference noted well possible unfairness lineup may sole means attack upon unequivocal courtroom identification recognized difficulty determining whether identification based independent recollection unaided lineup identification contrast inevitable discovery involves speculative elements focuses demonstrated historical facts capable ready verification impeachment require departure usual burden proof suppression hearings williams presented district newly discovered evidence consisting previously overlooked photographs body site discovery recent deposition testimony investigative officer charge search ruxlow contends ruxlow testimony post hoc rationalization challenges ruxlow credibility however state trial federal district heard ruxlow testimony credited district found newly discovered evidence neither adds much subtracts much suppression hearing evidence ibid view holding challenged evidence admissible inevitable discovery exception exclusionary rule find unnecessary decide whether stone powell extended bar federal habeas corpus review williams sixth amendment claim express view issue justice white concurring join fully opinion write separately point many justice stevens remarks beside point recalled brewer williams decision four members including view detective leaming done nothing wrong let alone anything unconstitutional three us observed anyone lost intricacies prophylactic rules miranda arizona result case seems utterly senseless thus unjustified reflection detective leaming say decide dispense requirements law post page decided take procedural shortcuts instead complying law post doubt acting many competent police officers acted similar circumstances light law five justices later thought mistaken call making villain lecture deliberate police misconduct resulting costs society justice stevens concurring judgment litigation exceptional least three reasons facts unusually tragic involves unusually clear violation constitutional rights graphically illustrates societal costs may incurred police officers decide dispense requirements law adequately discuss aspects case unable join opinion holding respondent first conviction unconstitutionally obtained justice stewart writing correctly observed pressures state executive judicial officers charged administration criminal law great especially crime murder victim small child precisely predictability pressures makes imperative resolute loyalty guarantees constitution extends us brewer williams williams ii constitutional violation gave rise decision williams neither acknowledged fairly explained opinion yet propriety admitting evidence relating victim body evaluated constitutional violation properly identified taken custody williams recent escapee mental hospital abducted murdered small child posed special threat public safety acting lawyer advice williams surrendered davenport police lawyer notified des moines police williams imminent surrender police officials presence detective leaming agreed williams questioned brought back davenport williams advised agreement attorney arraigned davenport williams conferred another lawyer acting local counsel lawyer reminded williams questioned detective leaming arrived davenport local counsel stressed agreement carried williams questioned detective leaming took custody respondent denied counsel request ride des moines police car williams christian burial speech occurred ensuing trip justice powell succinctly observed case police deliberately took advantage inherently coercive setting absence counsel contrary express agreement concurring opinion sixth amendment guarantees conviction accused product adversarial process rather ex parte investigation determination prosecutor williams grew line cases made clear adversarial process protected sixth amendment may undermined strategems police spano new york dealt confession uncounseled defendant prolonged interrogation subsequent indictment murder four justices indicated questioning violated sixth amendment noting hold otherwise totally undermine adversarial process proof constitution guarantees assistance counsel man trial life orderly courtroom presided judge open public protected procedural safeguards law surely constitution promises much vouchsafe less man midnight inquisition squad room police station stewart concurring joined douglas brennan view ripened holding massiah hold petitioner denied basic protections sixth amendment used trial evidence incriminating words federal agents deliberately elicited indicted absence counsel williams held detective leaming violated clear rule massiah deliberately eliciting incriminating statements respondent pendency adversarial process outside process see violation aggravated fact detective leaming breached promise counsel act undermine role counsel adversarial process christian burial speech nothing less attempt substitute ex parte inquisitorial process clash adversaries commanded constitution thus plaint criminal go free constable blundered ante quoting people defore entirely beside point pertinent chief justice wrote another occasion case justice cardozo words constable blundered rather one constable planned impermissible interference right assistance counsel henry citation omitted iii constitutional violation properly identified answers questions presented case follow readily admission victim body discovered anyway means trial case product inquisitorial process process untainted illegality good bad faith detective leaming therefore simply irrelevant trial process tainted result conduct defendant received type trial sixth amendment envisions see morrison weatherford bursey wade generalizations exclusionary rule employed majority see ante simply address primary question case majority correct insist rule exclusion provide authorities incentive commit violations constitution ante inevitable discovery rule provided incentive permitting prosecution avoid uncertainties inherent search evidence undermine constitutional guarantee therefore inconsistent deterrent purposes exclusionary rule burden proof inevitable discovery question placed prosecution ante must bear risk error determination made necessary constitutional violation uncertainty whether body discovered resolved favor explains ante petitioner adduced evidence demonstrating time constitutional violation investigation already way natural probable course events soon discovered body case prosecution escape responsibility constitutional violation speculation extent uncertainty created constitutional violation prosecution required resolve uncertainty proof even detective leaming acted bad faith sense deliberately violated constitution order avoid possibility body discovered prosecution ultimately avoid risk burden proof forces assume risk need adduce proof sufficient discharge burden difficulty predicting whether proof available sufficient means inevitable discovery rule permit state officials avoid uncertainty faced constitutional violation majority refers societal cost excluding probative evidence ante view relevant cost imposed society police officers decide take procedural shortcuts instead complying law consequence shortcut detective leaming took decided question williams case wait hour arrived des moines answer years years unnecessary costly litigation instead conviction affirmed routine fashion case still alive years later thanks detective leaming state iowa expended vast sums money countless hours professional labor defense expenditure surely provides adequate deterrent similar violations responsibility expenditure lies constitution rather constable accordingly concur judgment wrote time nothing write matter well reasoned forcefully expressed bring back victim tragedy undo consequences official neglect led respondent escape state mental institution emotional aspects case make difficult decide dispassionately qualify obligation apply law eye future well concern result particular case us concurring opinion facts found williams see professor kamisar demonstrated number unexplained ambiguities record kamisar foreword brewer williams hard look discomfiting record geo nevertheless account facts basis williams neither party seeks reexamination findings see strickland washington cronic polk county dodson herring new york anders california defendant placed trust experienced iowa trial lawyer turn trusted iowa law enforcement authorities honor commitment made negotiations led apprehension potentially dangerous person analysis critical stage proceeding participation independent professional vital importance accused society stage countless others law profoundly affects life individual lawyer essential medium demands commitments sovereign communicated citizen long run seriously concerned individual effective representation counsel state permitted dishonor promise lawyer stevens concurring omitted see also whole point massiah prevention state taking advantage uncounseled defendant sixth amendment rights attach christian burial speech attempt take advantage williams attempt massiah prohibits attempt violates constitutional mandate system proceed point accusatorial manner grano rhode island innis need reconsider constitutional premises underlying law confessions crim rev emphasis original see also marshall concurring theme chief justice dissenting opinion williams seems permeate opinion written today even extent using familiar hypothetical found people defore compare discussion judge cardozo grim prophecy dissenting opinion ante see also stone powell burger concurring bivens six unknown federal narcotics agents burger dissenting killough app en banc burger dissenting see stovall denno gilbert california see also moore illinois see generally stone powell janis calandra terry ohio tehan ex rel shott mapp ohio elkins agree majority holding prosecution must prove evidence inevitably discovered preponderance evidence rather clear convincing evidence ante inevitable discovery finding based objective evidence concerning scope ongoing investigation objectively verified impeached hence extraordinary burden proof needed order preserve defendant ability subject prosecution case meaningful adversarial testing required sixth amendment see cronic connection worth noting justice marshall williams light assistance respondent attorney provided des moines police seems apparent lawyer intended learn location body client reveal police see concurring opinion thus need shortcut practically nonexistent justice brennan justice marshall joins dissenting brewer williams held respondent state conviction murder set aside based part statements obtained respondent violation right assistance counsel guaranteed sixth fourteenth amendments time noted hile neither williams incriminating statements testimony describing led police victim body constitutionally admitted evidence evidence body found condition might well admissible theory body discovered event extent today decision adopts inevitable discovery exception exclusionary rule simply acknowledges doctrine akin independent source exception first recognized silverthorne lumber see wade wong sun particular concludes unconstitutionally obtained evidence may admitted trial inevitably discovered condition independent line investigation already pursued constitutional violation occurred every federal appeals previously addressing issue see ante agree circumstances inevitable discovery exception exclusionary rule consistent requirements constitution zealous efforts emasculate exclusionary rule however loses sight crucial difference inevitable discovery doctrine independent source exception derived properly applied independent source exception allows prosecution use evidence fact obtained fully lawful means therefore violence constitutional protections exclusionary rule meant enforce inevitable discovery exception likewise compatible constitution though differs one key respect next kin specifically evidence sought introduced trial actually obtained independent source rather discovered matter course independent investigations allowed proceed view distinction require government satisfy heightened burden proof allowed use evidence inevitable discovery exception necessarily implicates hypothetical finding differs kind factual finding precedes application independent source rule ensure hypothetical finding narrowly confined circumstances functionally equivalent independent source protect fully fundamental rights served exclusionary rule require clear convincing evidence concluding government met burden proof issue see wade supra increasing burden proof serves impress factfinder importance decision thereby reduces risk illegally obtained evidence admitted cf addington texas santosky kramer raising standard proof practical symbolic consequences lower courts impose requirement remand case application heightened burden proof lower courts first instance therefore unable join either opinion judgment