The cause before us is an appeal by the State of Oklahoma through the Attorney General of that State, seeking reversal of the judgment of the United States District Court which granted a writ of habeas corpus to the petitioner-appellee herein. The trial court issued the writ and directed the release from custody of the petitioner-appellee Paul Mayabb. The appeal is pursuant to 28 U.S.C. § 1291.
The petitioner-appellee was convicted following a plea of guilty to the crime of murder on April 13, 1971, and was sentenced to life in prison by the Seventh Judicial District Court of the State of Oklahoma. No appeal was taken from the conviction, but Mayabb did file a petition for a writ of habeas corpus in the District Court of Oklahoma County. This petition was denied June 3, 1975 and the judgment was affirmed on appeal by the Court of Criminal Appeals of the State of Oklahoma.1
Mayabb’s next step was to file a petition for a writ of habeas corpus pursuant to 28 U.S.C. § 2254. In that petition, it is alleged that Mayabb’s constitutional rights were violated by reason of the fact that at the time of his conviction, males aged 16 to 18 who were charged with crimes in Oklahoma were tried as adults, while females in the same age group were treated as juveniles unless certified for trial as adults. At the time of the alleged murder petitioner was 17 years of age but close to 18. In his petition he alleged that the discriminatory treatment of males was unconstitutional. The denial of Fourteenth Amendment equal protection of the law it is asserted, entitles him to have the conviction vacated and to be released from custody. Petitioner relied on this court’s decisions in Lamb v. Brown, 456 F.2d 18 (10th Cir. 1972) and Radcliff v. Anderson, 509 F.2d 1093 (10th Cir. 1974), cert. denied, 421 U.S. 939, 95 S.Ct. 1667, 44 L.Ed.2d 95 (1975).
The following points are made by the State of Oklahoma:
1. The federal district court was obligated to require habeas petitioner Mayabb to re-exhaust newly created state remedies which were not available when the petition was originally filed pursuant to 28 U.S.C. § 2254.
2. The United States District Court, sitting as an Oklahoma court, committed reversible error by suppressing the confession of Mayabb where it was in conformity with state juvenile law as well as constitutional Miranda requirements.
POINT ONE
WAS THE DISTRICT COURT COMPELLED TO SEND THE PETITIONER BACK TO RE-EXHAUST NEWLY CREATED STATE REMEDIES NOT AVAILABLE WHEN THE PETITION WAS ORIGINALLY FILED PURSUANT TO 28 U.S.C. § 2254?
The trial court determined that re-exhaustion was not necessary. We affirm. This court’s decision in the case of Lamb v. Brown, supra, held that the Oklahoma statute defining a delinquent chiid as a male under 16 years of age or a female under 18 years was unconstitutional. By virtue of that definition, all males over 16 years of age charged with crimes were treated as adults. On the other hand, females be*1130tween the ages of 16 and 18 who were charged with crimes were dealt with as juveniles unless certified, after investigation and hearing, to be triable as adults. Because there was no logical justification for discrimination in the treatment of males and females, this court held § 1101(a) of 10 Okla.Stat. to be unconstitutional.
In the case of Radcliff v. Anderson, supra, this court held that the Lamb decision should be applied retroactively, in spite of a statement to the contrary in the Lamb opinion. We found that the denial of a certification hearing before trial as an adult raised concern for basic fairness and essential justice. 509 F.2d at 1096.
In Schaffer v. Green, 496 P.2d 375 (Okl. Crim.App.1972), the Oklahoma Court of Criminal Appeals ruled, in light of our decision in Lamb, that 10 Okla.Stat. § 1101A was unconstitutional. On April 4, .1972, the Oklahoma Legislature amended § 1101 to define “child” as all persons below the age of 18, thus eliminating any discrimination in the treatment of males and females. The related § 1101A was repealed. An effort was made by the Oklahoma court in Dean v. Crisp, 536 P.2d 961 (Okl.Crim.App.1975), to revive the last preceding statute which contained a constitutional, non-discriminatory definition of “delinquent child.” This was found in Compiled Laws of Oklahoma 1909, Chapter 13, Article I, § 594, which provided that all persons under 16 be classified as juveniles while all over 16 were considered adults. The Oklahoma court concluded that until the 1972 amendment to § 1101, certification hearings were not required.
In Bromley v. Crisp, 561 F.2d 1351 (10th Cir. 1977), cert. denied, 435 U.S. 908, 98 S.Ct. 1458, 55 L.Ed.2d 499 (1978), the defendant, while he was 17 and represented by counsel, entered a plea of guilty to a charge of assault and battery with a dangerous weapon. He received a suspended sentence. In March 1974, he plead guilty to two charges of second degree burglary after former conviction of a felony and one charge of robbery with firearms after former conviction of a felony. The sentence was three concurrent 22 year terms. The former conviction premising all three of these recidivist convictions was the assault and battery conviction in 1972 when he was prosecuted as an adult without certification for such treatment. Following the 1974 convictions Bromley sought post conviction relief in the state courts, asserting that the former conviction was invalid under the Lamb equal protection holding. He then brought his federal habeas corpus petition, in which his constitutional claim was rejected on the ground that the plea of guilty had waived the prior defects alleged. The appeal in Bromley followed.
The argument by the state on appeal was that the rulings were correct, because the guilty pleas prevented assertion of claims of earlier deprivation of constitutional rights. This court pointed out that although there are a number of cases which hold that where a guilty plea is voluntarily made it precludes subsequent attack on a conviction, the cases of Blackledge v. Perry, 417 U.S. 21, 94 S.Ct. 2098, 40 L.Ed.2d 628 (1974) and Menna v. New York, 423 U.S. 61, 96 S.Ct. 241, 46 L.Ed.2d 195 (1975) hold that the preclusive effects of guilty pleas are not applicable where the constitutional claims go to the power of the state to bring the defendant into court to answer the charge brought against him. This court, however, did not rest its decision on that point, but rather took the narrower position that the specifics and merits of the equal protection claims were considered by the Oklahoma courts. Where that is the case, federal courts in habeas corpus suits should likewise entertain the claims.
In Bromley v. Crisp, this court also rejected the view that the reconstruction of state law offered in Dean v. Crisp, supra, cured any constitutional problems created by discrimination against males aged 16 to 18. We took notice that girls were, in fact, given preferential treatment before § 1101 was amended, and boys were, in fact, denied equal protection of the law. However, we recognized that a writ of habeas corpus need not be issued by the federal court in every case where a boy aged 16 to 18 had *1131been tried and convicted as an adult without the benefit of a certification hearing. We found that if the federal habeas court “is clearly convinced that certification would have been made in the state court, the conviction need not be set aside * *
561 F.2d at 1357.
In Bromley it was also stated that in then-pending federal habeas cases, the district courts should withhold judgment “for a reasonable time to allow the determination to be made in state courts. If the state obtains in the Oklahoma courts a determination that certification would have occurred, the federal district court should deny the writ; if the state court finding is otherwise, the writ should issue.” 561 F.2d at 1356, fn. 6. Should no determination be made in the state court, the federal courts were advised to hold hearings “and make the ruling as to whether or not the court is clearly convinced that petitioner would have been certified for trial as an adult * * *.” Id. We also approved use of the state test, which provides for certifying “such child capable of knowing right from wrong and to be held accountable for his acts.” Id. See, Sherfield v. State, 511 P.2d 598 (Okl.Crim.App.1973).
Based on the Bromley decision the trial court here, Judge Cook presiding, issued an order dated March 13, 1978 granting the appellant 120 days in which to obtain a state court determination as to whether defendant would have been certified to stand trial as an adult had a certification hearing been held. On May 23, 1978, however, a judge of the District Court of Oklahoma County entered an order in which he found that the state could not invoke the jurisdiction of that court to review the judgment. On November 13,1980, a hearing was held in the federal district court to determine whether Mayabb would have been certified to stand trial as an adult. The state presented the testimony of one witness, Officer Richard Mullins of the Oklahoma City Police Department. Mullins was the primary investigator of the underlying murder case here.
When the state attempted to elicit testimony regarding certain statements allegedly made by petitioner Mayabb, counsel for petitioner objected and the suppression question was explored. The petitioner, his mother and his brother testified. The court found that although the officer explained his constitutional rights to the petitioner, as well as to his mother, before questioning petitioner, neither of them could read or write, or understand their rights, and that a knowing, intelligent and voluntary waiver of rights was not made. It was on this basis that the court suppressed the statements. It should be mentioned that the court did not consider the statements for any purpose. An additional piece of evidence was introduced by the state, a file card showing three previous legal incidents involving petitioner. Because the underlying juvenile court records had been destroyed, the information on the card could not be verified, nor could the disposition of any of the charges be determined. The trial court found on the evidence presented that petitioner would not have been certified to stand trial as an adult. Following various post hearing motions, the order issuing the writ of habeas corpus was entered. Petitioner was released from custody on April 20, 1981.
The Dean v. Crisp, supra, revival of the last preceding constitutionally valid statute has been overruled by the Oklahoma court in Edwards v. State, 591 P.2d 313 (Okl. Crim.App.1979). The Edwards opinion held that boys were the victims of unconstitutional discrimination and denial of equal protection. The Oklahoma court also agreed with this court’s holding in Radcliff that retroactive relief should be granted to boys between 16 and 18 who were prosecuted as adults without the benefit of certification hearings. The Edwards order contained the following language:
[T]he (petitioner) must be able to state to the district court some valid reason to believe that certification would have been denied. If he can do this, then he will be entitled to an evidentiary hearing on the question. The state has the burden to prove by a preponderance of the evidence *1132that waiver of jurisdiction of the Juvenile Court would have occurred had a certification hearing been held.
* * * * * *
If the state can establish that the (petitioner) would have been certified had a certification hearing been held, then his application for post-conviction relief should be denied. If the state cannot carry its burden, then post-conviction relief should be granted and the (petitioner’s) convictions should be vacated. Edwards v. State, supra, at 321-322.
It should be mentioned that the Edwards case was decided after the District Court of Oklahoma County determined in 1978 that it lacked jurisdiction to hold a certification hearing on the state’s application, but before the certification hearing was held in the federal district court in 1980.
The important inquiry is whether as a result of the Edwards case a new Oklahoma remedy was created which required that an effort to re-exhaust be made by petitioner. In the Edwards case, a male who was convicted and sentenced as an adult for a crime committed between the ages of 16 and 18 was held to be entitled to an evidentiary hearing in state court on the certification question, if he can state some valid reason to believe that certification would have been denied.
Petitioner has argued that the remedy provided by the Edwards decision is ineffectual because it places the burden on the petitioner to state some reason to believe .that certification would have been denied, in addition to the facts that he was 16 to 18 years of age at the time of the crime and was denied a certification hearing, before he will be entitled to a hearing. Additionally, petitioner points to language in Edwards which indicates that the state need only prove by a preponderance of the evidence that certification to stand trial as an adult would have occurred. 591 P.2d at 321-322. In Bromley v. Crisp, supra, this court has held that if a male 16 to 18 years of age at the time of an offense seeks a remedy based on a failure to hold a certification hearing, the state is then required to prove that certification would have occurred. If the hearing is held in federal court, the court must be “clearly convinced” that certification would have occurred. However, we need not and do not reach the assertion that the Edwards remedy is ineffective in this case.
We recognize that in certain circumstances, a supervening change in applicable law does require that re-exhaustion of state remedies occur before a federal court may act upon a habeas petition of a state prisoner. Thus, a supervening change in federal substantive law requires the state courts to be given an opportunity to consider a petitioner’s contention in the light of such changes. Drennon v. Hess, 642 F.2d 1204 (10th Cir. 1981); Franklin v. Conway, 546 F.2d 579 (4th Cir. 1976); James v. Copinger, 428 F.2d 235 (4th Cir. 1970).
Changes in state procedural law have also been held to require that a federal court stay habeas proceedings so as to permit re-exhaustion. Cf., Case v. Nebraska, 381 U.S. 336, 85 S.Ct. 1486, 14 L.Ed.2d 422 (1965); James v. Copinger, supra. The state has relied on Mabry v. Klimas, 448 U.S. 444, 100 S.Ct. 2755, 65 L.Ed.2d 897 (1980). The petitioner had been convicted and sentenced in that case under a recidivist statute. On appeal he argued that some of his prior convictions should not have been admitted into evidence. The state supreme court reduced his sentence to the minimum that could have been imposed had the inadmissible convictions been excluded. Thereafter, petitioner sought a writ of habeas corpus in the federal court alleging that his sentencing was unconstitutional and not remedied by the modification on appeal. The state recidivist statute was amended after the petitioner’s trial. The Eighth Circuit found that because the amendment, if applicable to the petitioner, would result in a lower sentence, a writ of habeas corpus should issue unless he was resentenced. The Supreme Court reversed, noting that the state courts had never been presented with the argument that the petitioner was entitled to resentencing by virtue of the amended statute. Our analysis *1133of Mabry is that it merely reaffirms the rule that a state prisoner must initially exhaust state remedies before resorting to federal habeas corpus. Picard v. Connor, 404 U.S. 270, 275, 92 S.Ct. 509, 512, 30 L.Ed.2d 438 (1971). Mabry makes it clear that this requirement will continue to apply where an intervening change in state law has given rise to a new theory.
The result differs where, as here, there is an intervening change in state substantive law.
If the change provides an effective state procedure, * * * or a fundamental variation in substantive federal law, the petitioner will generally be required to return to the state courts. If, however, the change is in the substantive state law on the federal issue, federal consideration of the petitioner’s claim will generally not be delayed. Roberts v. La Vallee, 389 U.S. 40, 88 S.Ct. 194, 19 L.Ed.2d 41 (1967). In the latter situation, the state courts already had the opportunity to consider the petitioner’s claim, and the goals underpinning the exhaustion doctrine would not be furthered. Galtieri v. Wainwright, 582 F.2d 348, 355 (5th Cir. 1978).
In the present case, petitioner presented his claim to the state courts in 1975. The state procedure which petitioner invoked would have afforded an adequate forum for consideration of the legal and factual questions presented. See 22 Okla.Stat. § 1080, et seq. Probably because of the then controlling state substantive law, the petition was dismissed. The subsequent change in state substantive law did not trigger a re-exhaustion requirement.2
In the present case the state courts had an opportunity to consider petitioner’s claim, even disregarding the state’s request for hearing. The Edwards decision made no change in the state post conviction remedy procedure. Rather, Edwards altered the substantive law of the state so as to recognize that persons such as petitioner may be entitled to a remedy in certain circumstances.
In Roberts v. LaVallee, 389 U.S. 40, 88 S.Ct. 194, 19 L.Ed.2d 41 (1967), the Supreme Court held that a similar change in the state substantive law did not give rise to a re-exhaustion requirement. There, an indigent petitioner had requested a free transcript of the testimony of a key state witness rendered at a preliminary hearing. The petitioner asserted his entitlement to such a transcript before his trial, throughout the state appeals process and in state post conviction proceedings. After his application for federal habeas corpus had been filed, the highest state appellate court ruled that denial of free transcripts to indigents is unconstitutional. The Second Circuit held that because the petitioner might now receive the relief he sought in state court, the federal petition ought to be dismissed and re-exhaustion of state remedies should be required. The Supreme Court, however, reversed, holding that repeated applications to state courts are not required in such circumstances. See also, Francisco v. Gathwright, 419 U.S. 59, 95 S.Ct. 257, 42 L.Ed.2d 226 (1974); Wilwording v. Swenson, 404 U.S. 249, 92 S.Ct. 407, 30 L.Ed.2d 418 (1971); Fay v. Noia, 372 U.S. 391, 423-424, 83 S.Ct. 822, 840-41, 9 L.Ed.2d 837 (1963); United States ex rel. Holes v. Mancusi, 423 F.2d 1137 (2d Cir. 1970).
Accordingly, we conclude that it was not necessary for petitioner to re-exhaust state remedies in light of the Edwards decision. We note that in its response to petitioner’s complaint and petition, the state conceded that the issues raised had been presented to the Oklahoma courts in post conviction proceedings and that state remedies had been *1134exhausted. Moreover, the state did not urge the trial court to return the case to the state court following the Edwards decision. Indeed, counsel for the state expressed satisfaction with the federal forum shortly before the certification hearing began and after the trial court had raised the possibility of requiring re-exhaustion. Our finding is, then, that the trial court acted properly on this issue and we conclude that re-exhaustion was not mandated by applicable law.
POINT II
DID THE FEDERAL DISTRICT COURT COMMIT ERROR BY SUPPRESSING THE CONFESSION OF MAY ABB?
It will be recalled that petitioner’s statement was taken by an Oklahoma City police officer. The state contends that had the statements been admitted, the trial court would have been required to find that Mayabb would have been certified to stand trial as an adult. The state maintains that under state law, the confession of a child is admissible if the child’s parent was present and if the child and parent were advised of their legal rights. See 10 Okla.Stat. § 1109(a). The state further argues that under Oklahoma law no waiver of rights need be shown. As to federal law, the appellant asserts that petitioner’s plea of guilty precludes any claim in this habeas corpus proceeding that his statements are inadmissible. Alternatively, the state argues that the trial court erred in concluding from the evidence presented that Mayabb’s statements were not voluntarily, knowingly and intelligently made.
One of our conclusions is that the evidence supports the trial court’s finding that petitioner’s statements were not knowingly, voluntarily and intelligently made. The petitioner has argued that the question of the admissibility of his statements is not properly before the court, because the state did not attempt to introduce petitioner’s written statement into evidence and because no offer of proof was made after the trial court decided to suppress petitioner’s oral statements. Rule 103(a)(2), Federal Rules of Evidence, provides that error may not be asserted based on exclusion of evidence unless “the substance of the evidence was made known to the court by offer or was apparent from the context within which questions were asked.” It would appear that the petitioner’s oral statements were made known to the court in substance. We note also that counsel for the state have included in their brief the text of what purports to be the written statement of the accused. As discussed more fully below, the written statement is not part of the record and if the state had wished to make it part of the record, at the very least it should have been formally offered.
The Supreme Court has not yet decided whether the requirements of Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966), apply fully in juvenile proceedings. Fare v. Michael C., 442 U.S. 707, 717, fn. 4, 99 S.Ct. 2560, 2567, fn. 4, 61 L.Ed.2d 197 (1979). It is clear, however, that the privilege against self incrimination does apply in juvenile proceedings. In Application of Gault, 387 U.S. 1, 55, 87 S.Ct. 1428, 1458, 18 L.Ed.2d 527 (1967), it was said:
We conclude that the constitutional privilege against self-incrimination is applicable in the case of juveniles as it is with respect to adults. * * * If counsel was not present for some permissible reason when an admission was obtained, the greatest care must be taken to assure that the admission was voluntary, in the sense not only that it was not coerced or suggested, but also that it was not the product of ignorance of rights, or of adolescent fantasy, fright or despair, (emphasis added)
As the Supreme Court recognized in Kent v. United States, 383 U.S. 541, 86 S.Ct. 1045, 16 L.Ed.2d 84 (1966), a certification hearing of this type is of “critical importance.” Thus, we find that a confession or admission of a juvenile is not admissible in a hearing on waiver of juvenile jurisdiction unless the statement was made voluntarily and with knowledge of constitutional rights. The Oklahoma Court of Criminal *1135Appeals has so held. The Oklahoma court said:
When we consider the critical nature of the rights adjudicated at such a hearing, * * * we are compelled to conclude that there is no rational basis for a rule which would permit an illegally obtained confession to be introduced into evidence at a certification hearing when the same confession would be clearly excluded at a delinquency hearing or a criminal trial. * * * We hold that it is the duty of the judge of the juvenile court to deny admission into evidence at a certification hearing those statements of a child obtained in violation of constitutional or statutory rights which are inadmissible in delinquency or criminal proceedings. J. T. P. v. State, 544 P.2d 1270, 1276 (Okl.Crim. App.1975).
See also, C. G. H. v. State, 580 P.2d 523, 525 (Okl.Crim.App.1978). The Oklahoma courts have given recognition to the proposition that such hearings are of critical importance and have held that confessions are not admissible in such hearings unless there is a knowing and intelligent waiver of the rights to counsel and to remain silent.
In the present case, petitioner, his mother and his brother all testified that at the time of his arrest neither petitioner nor his mother could read or write. Petitioner and his mother both testified that they were incapable of understanding a Miranda-type warning of legal rights, even if, as Officer Mullins testified, such a warning was read to them. Testimony also showed that neither petitioner nor his mother knew the meaning of words such as “incriminate” and petitioner did not even know what a lawyer was. Following the hearing the trial court ruled as follows:
Well, from the evidence that has been presented to the court it seems apparent that Mrs. Mayabb and Mr. Paul Mayabb neither could.read nor write. No question but that Officer Mullins read to them the document, I don’t question his statement there. I have serious doubts though that it had any real meaning to either. It would appear to the court that it was not a knowledgeable, knowing, understanding waiver, and under this testimony I am going to sustain the objection of counsel as to the confession.
The state argues that the trial court’s ruling was based exclusively on a finding that petitioner could not read or write, and that this alone does not render his statements inadmissible. We cannot agree with the state’s view of the court’s ruling. After reviewing the transcript of the hearing, we are convinced that the trial court could and did find that petitioner and his mother did not comprehend the oral statement of rights. Furthermore, there was testimony to the effect that petitioner requested an explanation and that this was refused, and that petitioner was threatened. Even discounting this evidence on which no express findings were made, we are satisfied that there is ample support in the record for the finding that a voluntary, knowing and intelligent waiver of rights was not made.
In effect the judge stated that he could do nothing other than grant the petition for the writ of habeas corpus for the reason that there was nothing in the record except the card showing petitioner’s juvenile court record. In other words, the only evidence that the state offered consisted of oral statements of the accused made to the officers prior to the time the written statement was prepared. The trial court ruled all of this out and rightly so. Inasmuch as it had been reduced to writing there was certainly good reason to exclude the preliminary admissions that led up to the giving of the confession. However, the state at no time offered the written confession and it is not properly in the record. Prior to oral argument in this appeal, the state filed a motion to correct the record, seeking to add three exhibits inadvertently omitted from the record on appeal. This court granted the motion. One of these “exhibits” was petitioner’s written statement. The Clerk of the District Court, however, refused to certify the written statement because it had never been made a part of that court’s records. It is true that the state delivered the statement to the Clerk of the Court, *1136who forwarded a copy to this court. However, I can say that no one of the panel has read this statement and should not because it was not made a part of the record. The trial court did not even make a ruling on it. The state should have tendered the statement; at least the tender would have made it a part of the record. In short, there is not a scrap of evidence here that would justify a positive ruling in favor of the state. We read the trial court’s conclusory remarks as being, in effect, in the nature of reasons for entering a default judgment against the state.
One further point that the state has argued is that petitioner’s guilty plea serves as a waiver of any claim that his statements are inadmissible. This, of course, is separate and distinct from the question just considered, namely the failure to admit the confession or the oral admissions. No argument based on the legal effect of the guilty plea was made when the trial court was considering the admissibility of the confession or as a part of the state’s motion to reopen. The trial court and the petitioner were at liberty to assume, if the question was considered, that the state had decided not to rely on the guilty plea. It is seldom that we can consider on appeal issues which were not raised in the trial court and we see no legal justification for departing from that rule here.
Our conclusion is that the trial court ruled correctly and in the only way possible in view of the condition of the record and, although we are unenthusiastic about this result, we are constrained to determine the cause on the record which is presented.
For the reasons set forth above we conclude that the judgment granting the writ of habeas corpus must be and is hereby affirmed.
. The petitioner had served approximately ten years in the state prison as of the time of his discharge on habeas corpus writ.
. Under available Oklahoma procedures, the preferred approach set forth in Bromley v. Crisp, supra, at 1356, fn. 6, may be best accomplished by withholding judgment for a reasonable time while the petitioner seeks a state court certification hearing under Edwards. In this case, in accordance with our Bromley guidelines, the district court withheld judgment to permit the state to seek a certification hearing in state court. Neither the requirement that state remedies be exhausted nor principles of sound judicial administration mandated that the district court delay the proceedings yet again to require the petitioner to return to state court after the decision in Edwards.