delivered the opinion of the Court.
After the Supreme Court of Florida had affirmed his conviction for murder, the petitioner applied to that court for leave to ask the trial court to review the judgment of conviction. The basis of his application was the claim *413that the testimony of two witnesses implicating him was perjured, and that they had testified falsely against him because they were “coerced, intimidated, beaten, threatened with violence and otherwise abused and mistreated” by the police and were “promised immunity from the electric chair” by the district attorney. After twice considering the matter, the Supreme Court of Florida denied the application. 146 Fla. 593, 1 So. 2d 628. We brought the case here, 313 U. S. 557, in view of our solicitude, especially where life is at stake, for those liberties which are guaranteed by the Due Process Clause of the Fourteenth Amendment.
The guides for decision are clear. If a state, whether by the active conduct or the connivance of the prosecution, obtains a conviction through the use of perjured testimony, it violates civilized standards for the trial of guilt or innocence and thereby deprives an accused of liberty without due process of law. Mooney v. Holohan, 294 U. S. 103. Equally offensive to the Constitutional guarantees of liberty are confessions wrung from an accused by overpowering his will, whether through physical violence or the more subtle forms of coercion commonly known as “the third degree.” Brown v. Mississippi, 297 U. S. 278; Chambers v. Florida, 309 U. S. 227; Lisenba v. California, 314 U. S. 219. In this collateral attack upon the judgment of conviction, the petitioner bases his claim on the recantation of one of the witnesses against him. He cannot, of course, contend that mere recantation of testimony is in itself ground for invoking the Due Process Clause against a conviction. However, if Florida through her responsible officials knowingly used false testimony which was extorted from a witness “by violence and torture,” one convicted may claim the protection of the Due Process Clause against a conviction based upon such testimony.
*414And so we come to the circumstances of this ease.
On November 25,1936, as a result of an attempted robbery, John H. Surrency and his wife, Mayme Elizabeth, were murdered. On December 16, 1936, Hysler was indicted for the murder of John Surrency; he was tried on January 21, 1937, was convicted on February 12, 1937, with recommendation of mercy, and was thereafter sentenced to imprisonment for life. On February 3,1938, his sentence was affirmed by the Florida Supreme Court. 132 Fla. 200, 181 So. 350. The record in the case was more than 3000 pages. On January 15, 1937, Hysler, together with two others, James Baker and Alvin Tyler, was indicted for the murder of Mrs. Surrency. A severance having been granted as to Tyler and Baker, Hysler was placed on trial on March 15, 1937, and on April 5 was found guilty without recommendation of mercy. On April 23, 1937, he was sentenced' to death. On April 24 he sued out a writ of error to the state Supreme Court, which on February 3, 1938, sustained the sentence, and on June 3 denied a rehearing. The record on this second trial was some 2500 pages. 132 Fla. 209, 181 So. 354.
Surrency kept a restaurant near Jacksonville, and on the fatal day was returning from one of his regular and well-known trips to that city to get checks cashed. Hysler had known Baker in connection with Hysler’s illicit whiskey business. Baker and Tyler were friends. The principal evidence in both trials against Hysler was their testimony. They testified with circumstantiality that Hysler induced them to hold up Surrency, furnished them a car, a pistol, and some whiskey, gave them detailed instructions for carrying out the plan, and by prearrangement was in the vicinity of the place of its execution. While their testimony doubtless was the foundation of Hysler’s convictions, the testimony both of numerous witnesses and Hysler himself sheds much confirming light *415on the story told by Baker and Tyler. A careful concurring opinion affirming the conviction now challenged concluded thus: “From the evidence it is difficult to see or understand how the jury in the Court below could have rendered a verdict other than guilty. We have thoroughly considered each assignment and faded to find error in the trial of the cause in the lower court.” 132 Fla. 209, 235, 181 So. 354, 364.
Accordingly, the date for the execution was set by the Governor of Florida for the week of February 20, 1939. In the meantime, however, an application for a writ of habeas corpus by Hysler was made to the Supreme Court of Florida, partly on the ground of insanity. This was denied by that Court on February 20, 1939. 136 Fla. 563, 187 So. 261. Tyler broke jail and has apparently remained a fugitive from justice. Baker was tried after Hysler, was convicted of murder in the first degree, and sentenced to death. His conviction was affirmed by the Florida Supreme Court on March 14, 1939, and a rehearing denied on April 11, 1939. 137 Fla. 27, 188 So. 634.
We have now reached the final chapter of this unedifying story in the administration of criminal justice. On April 10, 1941, more than four years after Hysler’s conviction for the murder of Mrs. Surrency, he petitioned the Supreme Court of Florida for permission to apply to the Circuit Court of Duval County, Florida (the court before which he was originally tried), for writ of error coram nobis. This common law writ, in its local adaptation, is Florida’s response to the requirements of Mooney v. Holohan, 294 U. S. 103, for the judicial correction of a wrong committed in the administration of criminal justice and resulting in the deprivation of life or liberty without due process. See Lamb v. Florida, 91 Fla. 396, 107 So. 535; Skipper v. Schumacher, 124 Fla. 384, 169 So. 58; Jones v. Florida, 130 Fla. 645, 178 So. *416404. In brief, a person in Florida who claims that his incarceration is due to “failure to observe that fundamental fairness essential to the very concept of justice,” Lisenba v. California, supra, at p. 236, even after his sentence has been duly affirmed by the highest court of the State, has full opportunity to have a jury pass on such a claim provided he first makes an adequate showing of the substantiality of his claim to the satisfaction of the Supreme Court of Florida. The decisions of that Court show that a naked allegation that a constitutional right has been invaded is not sufficient. A petitioner must “make a full disclosure of the specific facts relied on,” and not merely his conclusions “as to the nature and effect of Such facts.” The proof must enable the appellate court to “ascertain whether, under settled principles pertaining to such writ, the facts alleged would afford, at least prima facie, just ground for an application to the lower court for a writ of error coram nobis.” Washington v. Florida, 92 Fla. 740, 749, 110 So. 269, 262; see Skipper v. Schumacher, 124 Fla. 384, 405-08, 169 So. 58; Skipper v. Florida, 127 Fla. 553, 554-55, 173 So. 692. The latest formulation by the Florida Supreme Court of its function in considering an application for leave to apply to the trial court for a writ of error coram nobis is found in McCall v. Florida, 136 Fla. 349, 350, 186 So. 803 (1939): “In the exercise of its discretion in matters of this sort the court should look to the reasonableness of the allegations of the petition and to the existence of the probability of the truth thereof. This duty we have met and we are convinced that to grant the petition would be no less than a trifling with justice.”
Such a state procedure of course meets the requirements of the Due Process Clause. Vindication of Constitutional rights under the Due Process Clause does not demand uniformity of procedure by the forty-eight States. Each State is free to devise its own way of secur*417ing essential justice in these situations. The Due Process Clause did not stereotype the means for ascertaining the truth of a claim that that which duly appears as the administration of intrinsic justice was such merely in form, that in fact it was a perversion of justice by the law officers of the State. Each State may decide for itself whether, after guilt has been determined by the ordinary processes of trial and affirmed on appeal, a later challenge to its essential justice must come in the first instance, or even in the last instance, before a bench of judges rather than before a jury.
Florida then had ample machinery for correcting the Constitutional wrong of which Hysler complained. But it remains to consider whether in refusing him relief the Supreme Court of Florida denied a proper appeal to its corrective process for protecting a right guaranteed by the Fourteenth Amendment.
Ilysler’s claim before the Supreme Court of Florida was that Baker repudiated his testimony insofar as it implicated Hysler and that he now named another man as the instigator of the crime. Considering the fact that this repudiation came four years after leaden-footed justice had reached the end of the familiar trail of dilatory procedure, and that Baker now pointed to an instigator who was dead, the Supreme Court of Florida had every right and the plain duty to scrutinize this repudiation with a critical eye, in the light of its familiarity with the facts of this crime as they had been adduced in three trials, the voluminous records of which had been before that Court.1
The Florida Supreme Court had before it four affidavits by Baker. The affidavits must be considered here *418as they were before that Court — in their entirety. One was made on April 7,1941; the second on April 8 between six and seven in the evening; another between eight-thirty and nine of the same night; the fourth, the next day. The most striking feature of this series of retractions is that, in his first and spontaneous new account of the happenings that led to the murders on November 25, 1936, Baker does not attribute to coercion or inducements made by state authorities his testimony at the trials that Hysler was the instigator of the crimes. On the contrary, according to Baker’s new story, after the killing of the Surrencys, Tyler and he “agreed between them while they were in Cracker Swamp in the Marietta section of Duval County, that they would lay the, blame of the planning of the robbery of the Surrencys upon Clyde Hysler because they had had considerable liquor dealings with Clyde Hysler and knew him well, and for the reason that the Hyslers bore a bad reputation in Duval County, and for the further reason, that Clyde Hysler’s father had plenty of money and they thought that by laying the planning of the robbery of the Surrencys on Clyde Hysler that his father and his other relatives would put up sufficient money to get Clyde Hysler out of the trouble and that by laying it on to Clyde Hysler, that he, James Baker, and Alvin Tyler would escape the death penalty . . .”
There is no suggestion whatever in this explanation of what is now claimed to have been a false accusation that it was induced from without. Baker gives five reasons for having fixed the blame on Hysler — an explanation to which he had adhered for more than four years — but all these reasons make Baker and Tyler the spontaneous concocters of the alleged false charge. It was not until the next day, that Baker, under leading questions, suggested that his account of the crime, contemporaneous with it, *419was induced by the hope of getting “life instead of the chair.”2 Even in this second affidavit there is no hint that the prosecutor had any knowledge of the falsity of his-implication of Hysler.3 Only after a third session did Baker, in an ambiguous reply to another leading question, convey a suggestion of the prosecutor’s knowledge of the use of force preceding Baker’s original testimony. This *420is the only testimony that bears on the complicity of the prosecutor in the alleged coercion of Baker’s testimony:
“Q. Baker do you know whether or not Mr. Harrell [the State’s Attorney] knew if you was beat up to make you testify?
A. Yes, sir, he knows I couldn’t set down, none of the sheriff’s force knew it at the time, they knew it later when I made it in front all of the officers.
Q. When you made that statement you couldn’t set down?
A. Yes, sir, and I can’t set down good, and I wish you and those men could see that now.
Q. No, we want care to see — that’s all you want to say.
A. (Baker nodding his head indicating yes.)”
In his final affidavit on April 9, Baker returns to the alleged promise of the State’s Attorney that he would not “burn” him. But there is this time no suggestion that the prosecutor induced or knew of any false testimony by Baker.
We have seen that, according to Baker’s first statement on April 7, his attribution of Hysler’s responsibility was spontaneous and uncoerced. The circumstances of the case reinforce this and cast a proper scepticism upon Baker’s subsequent claims of coercion. According to the affidavits of the two lawyers who represented Hysler at his trials, they examined Baker and Tyler “at great length” in the presence of counsel for the two accomplices and “said witnesses were particularly questioned as to who was involved in said case, and said witnesses denied that anyone was involved in said case other than the defendants named in the indictment; that said witnesses further denied that any statements previously made by them to law enforcement officers were made under duress or with any hope or expectation of reward.” And the present Chief Justice of Florida, in his separate opinion on Baker’s appeal, characterized Baker’s confession as *421“entirely free and voluntary.” 137 Fla. 27, 29, 188 So. 634, 635.
In addition to these four affidavits by Baker, there were four subsidiary affidavits by others. Their want of significance is sufficiently attested by the fact that on the motion for rehearing of this cause before the Florida Supreme Court, reliance was placed exclusively upon.the Baker affidavits and no reference whatever was made to these subsidiary affidavits. Nor was reliance upon them made here.
The essence of Hysler’s claim before the Supreme Court of Florida was that his conviction was secured by unconstitutional means, that Baker was coerced to testify falsely by responsible state officials. The Court had to judge the substantiality of this claim on the basis of all that was before it, namely, the petition with its accompanying affidavits and the records of prior cases arising out of the same crime. The Court concluded that Hysler’s proof did not make out a prima facie case for asking the trial court to reconsider its judgment of conviction. However ineptly the Florida Supreme Court may have formulated the grounds for denying the application, its action leaves no room for doubt that the Court deemed the petitioner’s claim without substantial foundation. We construe its finding that the “petition” did not show the responsibility of the state officials for the alleged falsity of Baker’s original testimony to mean that the petitioner had failed to make the showing of substantiality which, according to the local procedure of Florida, was necessary in order to obtain the extraordinary relief furnished by the writ of error coram nobis.4 And our *422independent examination of the affidavits upon which his claim was based leaves no doubt that the finding of insubstantiality was justified. It certainly precludes a holding that such a finding was not justified.
The State’s security in the just administration of its criminal law must largely rest upon the competence of its trial courts. But that does not bar the state Supreme Court from exercising the vigilance of a hardheaded consideration of appeals to it for upsetting a conviction. That in the course of four years witnesses die or disappear, that memories fade, that a sense of responsibility may become attenuated, that repudiations and new incriminations like Baker’s on the eve of execution are not unfamiliar as a means of relieving others or as an irrational hope for self — these of course are not valid considerations for relaxing the protection of Constitutional rights. But they are relevant in exercising a hardy judgment in order to determine whether such a belated disclosure springs from the impulse for truth-telling or is the product of self-delusion or artifice prompted by the instinct of self-preservation.
Our ultimate inquiry is whether the State of Florida has denied to the petitioner the protection of the Due Process Clause. The record does not permit the conclusion that Florida has deprived him of his Constitutional rights.
Petitioner also claims that Florida has denied him the “equal protection” of its law. This contention is plainly without substance. If Hysler had been singled out for invidious treatment by the Florida Supreme Court, he could properly complain here. Compare Yick Wo v. *423Hopkins, 118 U. S. 356; McFarland v. American Sugar Co., 241 U. S. 79. But it is not a fact that the Florida Supreme Court has granted such applications in other cases but not in Hysler’s. See, e. g., Skipper v. Florida, 127 Fla. 553, 173 So. 692; McCall v. Florida, 136 Fla. 349, 186 So. 803.
Affirmed.
In denying Hysler’s application, the Supreme Court of Florida specifically stated that it was talcing judicial cognizance of its own records. 146 Fla. 593, 594-95, 1 So. 2d 628.
“Q. Then it was a definite promise from Mr. Harrell, the State’s Attorney to keep you from burning?
A. He said that he would see that I would get life, but that he would see that I didn’t stay at the chain gang but three yéars.
Q. You say he played off sick to keep from prosecuting you?
A. Yes, sir, Mr. Simpson his assistant and Mr. Hallows prosecuting, the Judge had ordered him to handle the Hysler case straight through, cause Mr. Hollows was not familiar with the case.
Q. Do you know whether or not Mr. Harrell had gone out of office and Mr. Hallows had taken office?
A. Yes, sir, I think he had and that was why the Judge wanted him to carry this thing on through, but I don’t be sure.
Q. Is there anything else you want to say along that line about those threats or beatings?
A. No, sir, that is all I can think of right now.”
“Q. Now what threats or promises did they make you to testify and implicate Clyde Hysler?
A. Well, Mr. Griffen and them didn’t, they didn’t make no promises, Mr. Hulbert did talk to me, that he would get me life imprisonment— life instead of the chair.
Q. Mr. Hubbert talked to you and made promises that you would get life instead of the chair?.
A. Yes, sir.
Q. What police-
A. That’s what it was, police officers and John Harrell.
Q. John W. Harrell, the State’s Attorney at that time?
A. Yes, sir.
Q. Did Mr. Harrell tell you that he would help you get a life sentence if you would testify against Clyde Hysler?
A. He said he wouldn’t burn me, that he, Mr. Acosta and Mr. Carson would get me out in three years time.”
The opinion of the Florida Supreme Court on petitioner’s motion for rehearing states, inter alia, that: “The allegations of the petition do not show that the prosecuting attorney had any guilty knowledge of the alleged maltreatment of the witness [Baker], or that the *422alleged falsity of the testimony of the witness Baker was known to the prosecuting officer. The petition does not show that any alleged maltreatment of witness was inflicted by any officer of the trial court or that same was known to any officer of the trial court.” 146 Fla. 593, 594, 1 So. 2d 628.