opinion: Mr. Justice Goldberg
  delivered the opinion of the Court.
  The petitioner, Raymond L. Haynes, was tried in a Superior Court of the State of Washington on a charge of. robbery, found guilty by a jury, and sentenced to imprisonment “for a term of not more than 20 years.” The Washington Supreme Court affirmed the conviction, with four of nine judges dissenting. 58 Wash. 2d 716; 364 P. 2d 935. Certiorari was granted, 370 U. S. 902, to consider whether the admission of the petitioner’s written and signed confession into evidence against him at trial constituted a denial of due process of law.
  Haynes contends that the confession was involuntary, and thus constitutionally inadmissible, because induced by police threats and promises. He testified at trial that during the approximately 16-hour period between the time of his arrest and the making and signing of the written confession, he several times asked police to allow him to call an attorney and to call his wife. He said that such requests were uniformly refused and that he was repeatedly told that he would not be allowed to call unless and until he “cooperated” with police and gave them a written and signed confession admitting participation in the-robbery. He was not permitted to phone his wife, or for that matter anyone, either on the night of his arrest or the next day. The police persisted in their refusals to allow him contact with the outside world, he said, even after he signed one written confession and after a preliminary hearing before a magistrate, late on the day following his arrest. According to the petitioner, he was, in fact, .held incommunicado by the police until some five or seven days after his arrest.
  The State asserts that the petitioner’s version of events is contradicted, that the confession was freely given, and that, in any event, the question of voluntariness was conclusively resolved against the petitioner by the verdict of the jury at trial. We consider each of these contentions in turn.
  I.
  'í'he petitioner was charged with robbing a gasoline service station in the City oh Spokane, Washington, at about 9 p. m. on Thursday, December 19, 1957. He was arrested by Spokane police in the vicinity of the station within approximately one-half hour after the crime. Though he orally admitted the robbery to officers while en route to the police station, he was, on arrival there, not charged with the crime, but instead booked for “investigation,” or, as it is locally called, placed on the “small book.” Concededly, prisoners held on the “small book” are permitted by police neither to make phone calls nor to have any visitors.
  Shortly after arriving at the station at about 10 p. m., the petitioner was questioned for about one-half hour by Lieutenant Wakeley of the Spokane police, during which period he again orally admitted the crime. He was then placed in a line-up and identified by witnesses as one of the robbers. Apparently, nothing else was done that night.
  On the following morning, beginning at approximately 9:30 a. m., the petitioner was again questioned for about an hour and a half, this time by Detectives Peck and Cockburn. He once more orally admitted the robbery, and a written confession was transcribed. Shortly thereafter, he was taken to the office of the deputy prosecutor, where still another statement was taken and transcribed. Though Haynes refused to sign this second confession, he then did sign the earlier statement given to Detectives Peck and Cockburn. Later that same afternoon he was taken before a magistrate for a preliminary hearing; this was at about 4 p. m. on December 20, the day after his arrest.
  At the conclusion of the hearing, Haynes was transferred to the county jail and on either the following Tuesday or Thursday was returned to the deputy prosecutor’s office. He was again asked to sign the second statement which he had given there some four to six days earlier, but again refused to do so.
  .The written confession taken from Haynes by Detectives Peck and Cockburn on the morning after his arrest and signed by Haynes on the same day in the deputy prosecutor’s office was introduced into evidence against .the' petitioner over proper and timely objection by his' counsel that such use would violate due process of law. Under the Washington procedure then in effect, volun-tariness of the confession was treated as a question of fact for ultimate determination by the jury. In overruling the petitioner’s objection to use of the confession,.‘the trial .judge, however, made an apparently preliminary-determination that it was voluntary and “conditionally” admissible. See 58 Wash. 2d, at 719-720, 364 P. 2d, at 937. The evidence going to voluntariness was heard before the jury and the issue submitted to it. The jury returned a general verdict of guilty and was not required to, and did not,’ indicate its view with respect to the voluntariness of the confession.
  II.
  The State first contends .that the petitioner’s version of the circumstances surrounding, the making and signing of his written confession is evidentially contradicted and thus should be rejected by this Court. We have carefully reviewed the entire record, however, and find that Haynes’ account is uncontradicted in its essential elements.
  Haynes testified that on the evening of his arrest he made several specific requests of the police that he be permitted to call an attorney and to call his wife; Each such request, he said, was refused. He stated, however, that he was told he might make a call if he confessed:
  “They kept wanting me to own up to robbing a Richfield Service Station and I asked Mr. [Detective] Pike several times if I could call a lawyer and he said if I cooperated and gave him a statement ; . . that I would be allowed- to call, to make a phone call
  On cross-examination, Lieutenant Wakeley, the officer who interrogated the petitioner'on the night of his arrest, first said that Haynes did not ask him for permission to call his wife, but merely inquired whether his wife would be notified of his arrest. Lieutenant Wakeley said that he told the petitioner that his wife would be notified. Defense counsel, however, pursued the point and, only a moment later, Wakeley testified that Haynes “may have” asked permission to call his wife himself; Wakeley said he didn’t “remember exactly whether he asked or whether we wouldn’t notify his wife.” Wakeley then testified that he simply didn’t “remember” whether Haynes asked to call his wife so that she might secure a lawyer for him ; in addition, the lieutenant admitted that the petitioner might have asked to call his wife after the interrogation was completed. Detective Pike, also testifying at trial, said simply that he had not talked to Haynes on the evening of the arrest.
  Tf this were the only evidence of police coercion and inducement in the record, we would face the problem of determining whether, in view of the testimony of Lieutenant Wakeley and Detective Pike, the petitioner’s own testimony would be sufficient, on review by this Court, to establish the existence of impermissible police conduct barring use of the written confession ultimately obtained. We need not pursue such an inquiry, however, since the record contains other probative, convincing, and uncon-tradicted evidence.
  The written confession introduced at trial was dictated and transcribed while Haynes was being questioned by Detectives Peck and Cockburn on the morning of December 20, the day after the robbery.. Haynes testified:
  “Q. . . . [S]tate whether or not the officers at that time asked you to give them a statement. A. Yes.
  “Q. And what was your answer to that? A. I wanted to call my wife.
  “Q. And were you allowed to call your wife? A. No.
  “Q. . . . This was on Friday? A. Friday.
  “Q. December 20th? A. Yes.
  “Q. And was anything else said with respect to making a telephone call? A. Mr. Pike [sic] and %e other officer both told me that when I had made a statement and cooperated with them that they would see to it that as soon as I got booked I could call my wife.
  “Q. Well, that was the night before you were told that, wasn’t it? A. I was told that the next day too, several times.
  “Q. Who were the officers that were with you? A. Oh, not Mr. Pike. Mr. Cockburn and Mr. Peck, I believe.
  “Q. In any event, Mr. Haynes, did you soon after that give them a statement? A. Well, not readily.
  “Q. Did you give them a statement? A. Yes.”
  The transcribed statement itself discloses that early in the interrogation Haynes asked whéther he might at least talk to -the prosecutor before proceeding further. He was told: “We just want to get this down for our records, and then we will go to the prosecutor’s office and he will ask the same questions that I am.”
  Whatever contradiction of Haynes’ account of his interrogation on the night of his arrest might be found in the testimony of Lieutenant Wakeley and Detective Pike, his explicit description of the circumstances surrounding his questioning and the taking by Detectives Peck and Qockburn of the challenged confession on the following day remains testimonially undisputed. Though he took the stand at trial, Detective Cockburn did not deny that he or Detective Peck had told the petitioner that he might call his wife only if he “cooperated” and gave the police a statement. Cockburn said merely that he could not “remember” whether Haynes had asked to call his wife. He conceded that the petitioner “could have” made such a request. No legal alchemy can transmute such wholly equivocal, testimony into a denial or refutation of the petitioner’s specific recitation of events. Detective Peck, did not testify and no other evidence was presented to contradict the petitioner’s testimony, either as part of the prosecution’s case in chief or, even more importantly, by way of rebuttal subsequent to the petitioner’s testimony. We cannot but attribute significance .to' the failure of the State, after listening to the petitioner’s direct and explicit testimony, to attempt to contradict that crucial evidence; this testimonial void is the more meaningful in light of the availability and willing cooperation, of the policemen who, if honestly able to do' so, could have readily denied the defendant’s claims. Similarly, no évi-dencé was offered to contradict in any way the petitioner’s testimony that when first taken to the deputy prosecutor’s office to sign the statement he had given to Detectives Peck and Cockburn he again requested permission to call 'his wife and was again refused.
  Thoiigh the police were in possession of evidence more .than adequate to justify his being charged without delay, it is uncontroverted that Haynes was not taken before a magistrate and granted a preliminary hearing until he had acceded to demands that he give and sign the written statement. Nor is there any indication in the record that prior to signing the written confession, or even thereafter, Haynes was advised by authorities of his right to remain silent, warned that his ánswers might be used against him, or told of his. rights respecting consultation with an attorney.
  In addition, there is no contradiction, of Haynes’ testimony that even' after he submitted and supplied the written confession used at trial, the police nonetheless continued the incommunicado detention while persisting in efforts to secure still another signature on another statement. Upon being returned to the deputy prosecutor’s office during the week following his arrest and while still being held incommunicado, the petitioner was again asked to sign the second statement which he had given there several days earlier. He refused to do so, he said, because, as he then told the deputy prosecutor, “all the promises of all the officers I had talked to had not been fulfilled and I had not been able to call my wife and I would sign nothing under any conditions until I was allowed to call my wife to see about legal counsel.” The State offered no evidence to rebut this testimony. Similarly uncontradicted is Haynes’ testimony that it was not until during or after this second interview with the prosecutor on the Tuesday, or Thursday — Haynes could not be quite certain — but, in any event, some five or seven days after his arrest, that he was first allowed to call his wife.
  The contested written confession itself contains the following exchange:
  “Q. Have we made you any threats or promises? A. No.
  “Q. Has [sic] any police officers made you any promises or threats? A. No — except that the Lieutenant promised me that as soon as I was booked that I could call my wife.
  “Q. You are being held for investigation — you haven’t been booked yet. When you are, you will be able to phone your wife.”
  The State argues that the quoted answers to the first two of these questions conclusively negative existence of coercion or inducement on the part of the police. The statement bears no such reading, however. The questions on their face disclose that the petitioner was told that “booking” was a prerequisite to calling his wife, and “booking” must mean booking on a charge of robbery. Since the police already had enough evidence to warrant charging the petitioner with the robbery — they had the petitioner’s prior oral admissions, the circumstances surrounding his arrest, and his identification by witnesses — the only fair inference to be drawn under all the circumstances is that he would not be booked on the robbery charge until the police had secured the additional evidence they desired, the signed statement for which they were pressing. The quoted portions of the signed confession thus support the petitioner’s version of events; under any view, they offer no viable or reliable contradiction.
  Even were it otherwise, there would be' substantial doubt as to the probative effect to be accorded recitations in the challenged confession that it was not involuntarily induced. Cf. Haley v. Ohio, 332 U. S. 596, 601 (opinion of Me. Justice Douglas). It would be anomalous, indeed, if such a statement, contained within the very document asserted to have been obtained by use of impermissible coercive pressures, was itself enough to create an evidentiary conflict precluding this Court’s effective review of the constitutional issue. Commón sense dictates the conclusion that if the authorities were successful in compelling the totally incriminating confession of guilt, the very issue for determination, they would have little, if any, trouble securing the self-contained concession of voluntariness. Certainly, we cannot accord any conclusive import to such an admission, particularly when, as here, it is immediately followed by recitations supporting the petitioner’s version of events.
  III.
  The uncontroverted portions of the record thus disclose that the petitioner’s written confession was obtained in an atmosphere of' substantial coercion and inducement created by statements and actions of state authorities. We have only recently held again that a confession obtained by police through the use of threats is viola-tive of due process and that “the question in each case is whether the defendant’s will was overborne at the time he confessed,” Lynumn v. Illinois, 372 U. S. 528, 534. “In short, the true test of admissibility is that the confession is made "freely, voluntarily and without compulsion or inducement of any sort.” Wilson v. United States, 162 U. S. 613, 623. See also Bram v. United States, 168 U. S. 532. And, of course, whether the confession was obtained by .coercion or improper inducement can be determined only by an examination of all of the attendant circumstances. See, e. g., Leym v. Denno, 347 U. S. 556, 558. Haynes’ undisputed testimony as to the making and signing of the challenged confession used against him at trial permits no doubt that it was obtained under a totality of circumstances evidencing an involuntary written admission of guilt.
  Here, as in Lynumn, supra, the petitioner was alone in the hands of the police, with no one to advise or aid him, and he had “no reason not to believe that the police had ample power to carry out their threats,” 372 U. S., at 534, to continue, for a much longer period if need be, the incommunicado detention — as in fact was actually done. Neither the petitioner’s prior contacts with the authorities nor the fact that he previously had made incriminating oral admissions negatives the existence and effectiveness of the coercive tactics used, in securing the written confession introduced at trial. The petitioner at first'resisted making a written statement and gave in only after consistent denials of his requests to call his wife, and the conditioning of such outside contact upon his accession to police demands. Confronted with the express threat of continued incommunicado detention and induced by the promise of communication with and access to family, Haynes understandably chose to make and sign the damning written statement; given the unfair and inherently coercive context in which made, that choice cannot-be said to be the voluntary product of a free and unconstrained will, as required by the Fourteenth Amendment.
  We cannot blind ourselves to what experience unmistakably teaches: that even apart from the express threat, the basic techniques present here — the secret and incommunicado detention and interrogation — are devices adapted and used to extort confessions from suspects. Of coürse, detection and solution of crime is, at best, a difficult and arduous task requiring determination and per-sisténce omthe part of all responsible officers charged with the duty of law enforcement. And, certainly, we do not mean to suggest that all interrogation of witnesses and suspects is impermissible. Such questioning is undoubtedly a,n essential tool in effective law enforcement. The line between proper and permissible police conduct and techniques and methods offensive to due process is, at best, a difficult one to draw, particularly in cases such as this where it is necessary to make fine judgments as to the effect of psychologically coercive pressures and inducements on the mind and will of an accused.. But we cannot escape the demands of judging or of making the ■ difficult appráisals inherent in determining whether constitutional-rights have been violated. We are here impelled to the conclusion, from all of the facts presented, that the bounds of due process have been exceeded.
  IV.
  Our conclusion is in no way foreclosed, as the State contends, by the fact that the state trial judge or the jury may have reached a different result on this issue.
  It is well settled that the duty óf constitutional adjudication resting upon this Court requires that the question whether the Due Process Clause of the Fourteenth Amendment has been violated by admission into evidence of a coerced confession be the subject of an independent determination here, see, e. g., Ashcraft v. Tennessee, 322 U. S. 143, 147-148; “we cannot escape the responsibility of making our own examination of the record,” Spano v. New York, 360 U. S. 315, 316. While, for purposes of review in this Court, the determination of the trial judge or of the jury will ordinarily be taken to resolve evidentiary conflicts and may be entitled to some weight even with. respect to the ultimate conclusion on the crucial issue of voluntariness, we cannot avoid our responsibilities by permitting ourselves to be “completely bound by state court determination of any issue essential to decision of a claim of federal right, else federal law could be frustrated by distorted fact finding.” Stein v. New York, 346 U. S. 156, 181. As state courts are, in instances such as this, charged with the primary responsibility of protecting basic and essential rights, we accord an appropriate and substantial effect to their resolutions of conflicts in evidence as to the occurrence or nonoccurrence of factual events and happenings. This is particularly apposite because the trial judge and jury are closest to the trial scene- and thus afforded the best opportunity to evaluate contradictory testimony. But, as declared in Ward v. Texas, 316 U. S. 547, 550, “when, as in this case, the question is properly raised as to whether a defendant has been denied the due process of law ... we cannot be precluded by. the verdict of a jury from determining whether the circumstances under which the confession was made were such that its admission in evidence amounts to a denial of due process.” To the same effect, see, e. g., Spano v. New York, 360 U. S. 315; Thomas v. Arizona, 356 U. S. 390, 393; Payne v. Arkansas, 356 U. S. 560, 562, 568; Ashcraft v. Tennessee, 322 U. S. 143, 147-148; Lisenba v. California, 314 U. S. 219, 237-238; Chambers v. Florida, 309 U. S. 227, 228.
  Beyond even the compelling nature of our precedents, however, there is here still another reason for refusing to consider the present inquiry foreclosed by the verdict of the jury to which the issue of voluntariness of the confession was submitted. The jury was instructed, in effect, not to consider as relevant on the issue of voluntariness of the confession the fact that a defendant is not reminded that he is under arrest, that he is not cautioned that he may remain silent, that he is not warned that his answers may be used against him, or that he is not advised that he is entitled to counsel. Whatever independent consequence these factors may otherwise have, they are unquestionably attendant circumstances which the accused is entitled to have appropriately considered in determining voluntariness and admissibility of his confession.
  In addition, the trial court instructed in terms of a Washington statute which permits consideration of a corroborated confession “made under inducement” and excepts only confessions “made under the influence of fear produced by threats.” It seems reasonably clear from this portion of the instructions that the jury may well have been misled as to the requisite constitutional standard, notwithstanding the apparent propriety of other portions of the instructions. Given the fact that the jury did no more than return a general verdict of guilty, we obviously have no way of knowing whether it found the confession to be voluntary and admissible or not. Because there was sufficient other evidence to sustain the verdict, the- jury may háve found the defendant guilty even though it.rejected the confession as involuntary; alternatively, the jury may have based its finding of guilt on the confession, reasoning, under the questionable instructions and the'Washington statute, that the confession was admissible as voluntary, even though improperly induced, because it was corroborated by the other evidence. Although, for the reasons indicated, the Washington statute and the quoted, instructions raise a serious and substantial question whether a proper constitutional standard was applied by the jury, we need not rely on the imperfections in the instructions as a separate ground of reversal. We think it clear, however, that these imperfections are entirely sufficient to preclude any dependence we might otherwise place on the jury verdict as settling the issue of voluntariness here.
  V.
  In reaching the conclusion which we do, we are not unmindful of substantial independent evidence tending to demonstrate the guilt of the petitioner. As was said in Rogers v. Richmond, 365 U. S. 534, 541:
  “Indeed, in many of the cases in which , the command of the Due Process Clause has compelled us to reverse state convictions involving the use of confessions obtained by impermissible methods,' independent corroborating evidence left little doubt of the truth of what the defendant had confessed;' Despite such verification, confessions were found to be the product of constitutionally impermissible methods in their inducement.”
  Of course, we neither express nor suggest a view with regard to the ultimate guilt or innocence of the petitioner here; that is for a jury to decide on a new trial free of constitutional infirmity, which the State is at liberty to order*.
  This case illustrates a particular facet of police utilization of improper methods. While history amply.shows that confessions have often been extorted to save law en-' forcement officials the trouble and effort of obtaining valid and independent evidence, the coercive devices used.here were designed to-obtain admissions which would incontrovertibly complete a case in which there had already been obtained, by proper investigative efforts, competent evidence sufficient to sustain a conviction. The procedures here are ho less constitutionally impermissible, and perhaps more unwarranted because so unnecessary. There is no reasonable or rational basis for claiming that the oppressive and unfair methods utilized were in any way essential to the detection or solution of the crime or to the protection of the public. The claim, so often made in the context of coerced confession cases, that the devices employed by the authorities were requisite to solution of the crime and successful prosecution of the guilty party cannot here be made.
  Official overzealousness of the type which vitiates the’ -petitioner’s conviction belo'vy Has only deleterious effects. Here it has put the State to the substantial additional expense of prosecuting the case through the appellate courts and, now, will require* even a greater expenditure in the event of retrial, as is likely. But it is the deprivation of the protected rights themselves which is fundamental and the. most-regrettable, not only because of the-effect on the individual defendant, but because of the effect on our system of law arid justice. Whether there is involved the brutal “third degree,” or the more subtle, but no less offensive, methods here obtaining, official misconduct cannot but breed disrespect for law, as well as for those-charged with its enforcément.
  The judgment below is vacated and the case is remanded to the Supreme Court of Washington for further proceedings not inconsistent herewith.
  It is so ordered.
  Haynes makes no claim that he was physically abused, deprived of food or rest, or subjected to uninterrupted questioning for prolonged periods.
  The petitioner’s brother, Keith Haynes, had been arrested a few minutes earlier. Though also charged with, and convicted of, participation in the robbery of the service station, he .does not seek review of his conviction here.
  Apparently recognizing the questionable nature of-such a practice, the Spokane police, we are told, have since abandoned use of the “small book” and the attendant restrictive practices.
  The written confession appears to indicate on its face that it was signed shortly before 2 p. m. on December 20, about 16% hours after Haynes was arrested. The State asserts in its brief, however, that the total time of detention prior to signing of the confession was “17 to 19” hours. We assume, for purposes here, that the 16-hour period is sufficiently accurate.
  Washington has since revised its rules of practice to provide for a preliminary hearing by the trial court, out of the presence of the jury, on the issue of voluntariness of a confession. See 58 Wash. 2d, at 720, 364 P. 2d, at 937, and Rules of Pleading, Practice and Procedure, Wash. Rev. Code, Rule 101.20W, Vol. 0, as amended, effective January 2, 1961.
  There is no indication that she was actually so notified. In fact, the petitioner’s wife telephoned police at about noon on the day following the robbery, but was refused any information beyond the fact that her husband was being held. Though she identified herself and asked specifically why her husband was in jail, she was told simply “to get the morning paper and read it.”
  The petitioner’s incommunicado detention was in contravention of an explicit Washington statute, Wash. Rev. Code, §9.33.020 (5), which prohibits and makes it a misdemeanor for police to “refuse permission to [an] . . . arrested person to communicate with' his friends or with an attorney” when the refusal has as its purpose the obtaining of á confession.
  While occurring after completion of the signed confession here challenged, such action not only tends to bear out petitioner’s version of what happened earlier but displays and confirms an official disregard by police of state law, see note 7, supra, and of the basic rights of the defendant. See Haley v. Ohio, 332 U. S. 596, 600 (opinion of Mr. Justice Douglas). The police “were rather concerned primarily .with securing a statement from defendant on which they could convict him. The undeviating intent of the officers to extract a confession from petitioner is therefore patent. When such an intent is shown, this Court has held- that the confession obtained must be examined with the most careful scrutiny . . . .” Spano v. New York, 360 U. S. 315, 324.
  Though the deputy prosecutor himself appeared as a witness for the State at the trial, his testimony was in no way directed to this statement' made in his office or the attendant circumstances and he was not recalled to the stand after Haynes testified so that he might controvert the petitioner’s version of events..
  See also Fikes v. Alabama, 352 U. S. 191, 197-198; Gallegos v. Nebraska, 342 U. S. 55, 65 (opinion of Mr. Justice Reed).
  The trial court told the jury:
  “And in this connection, I further instruct you that a confession or admission of a defendant is not rendered involuntary because he is not at the time of making the same reminded that he was under arrest, or that he was not obliged to reply, or that his answers would be used against him, or that he was entitled to be represented by counsel.”
  That the jury was to take this as precluding consideration of the cited factors is evidenced by the immediately succeeding instruction which advised that it should consider a denial of communication with friends or an attorney in connection with determining whether the. written confession was voluntary or not.
  See note 10, supra.
  The instruction commenced:
  "By statute of the State of Washington, it is provided:
  “ ‘The confession of a defendant made under inducement, with all the circumstances, may be given as evidence against him, éxcept when made under the influence of fear produced by threats; but a confession made under inducement is not sufficient to warrant a conviction without corroborating testimony.’ ”
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