In 1986, at the age of sixteen, Appellant Sean Richard Sellers shot and killed three people. He was subsequently convicted and sentenced to death. He has exercised the full panoply of appeals and post-conviction remedies available to him in the state of Oklahoma. After a thorough and carefully considered sixty-nine page review of the issues presented it under 28 U.S.C. §§ 2241 and 2254, the United States District Court for the Western District of Oklahoma denied relief. Sellers has appealed that ruling presenting to us eight issues claiming denials of *1335 due process of law, effective assistance of counsel, and a fair trial, which individually and cumulatively resulted in a fundamentally unfair trial and unconstitutional sentence of death. Although troubled by the extent of uncontroverted clinical evidence proving Petitioner suffers from Multiple Personality Disorder, now and at the time of the offenses of conviction, and that the offenses were committed by an “alter” personality, we are constrained to hold Petitioner has failed to establish grounds for federal habeas corpus relief. Even though his illness is such that he may be able to prove his factual innocence of those crimes, we believe he must be left to the avenue of executive clemency to pursue that claim. We are not persuaded by any of the remaining arguments and, therefore, affirm the judgment of the district court.
I.
Sellers’ crimes were committed in two transactions. His first victim was Robert Bower, a convenience store clerk, who died because Sellers told a friend he “want[ed] to see what it feels like to kill somebody.” Escaping detection for the first murder, six months later, Sellers killed his mother and stepfather, each with a single shot to the back of the head, making it appear the couple had been attacked by an intruder in the middle of the night. Afterward, Sellers told a friend he thought he had done a good job feigning his innocent discovery of the bodies and described how he stood in his undershorts while firing the two shots so no blood would spatter and be discovered on his clothing.
At his state trial on three counts of first degree murder, defense counsel portrayed Sellers as the victim of Satanism and occult worship. He further argued Sellers’ addiction to the game, Dungeons and Dragons, dictated his actions and disconnected him from any consciousness of wrongdoing or responsibility. A psychiatric expert testified Sean was “legally unconscious” at the time of all three killings and therefore incapable of forming the intent required of first degree murder.
For the murders of Vonda and Paul Bello-fatto, the State alleged and the jury found the killings were especially heinous, atrocious, or cruel; that Sellers constituted a continuing threat to society; and Sellers knowingly created a great risk of death to more than one person when he committed the double homicide. To support the death penalty for the murder of Robert Bower, the State alleged and the jury found the heinous, atrocious, or cruel and continuing threat ag-gravators.
In the direct appeal of the convictions,
Sellers v. State,
In a subsequent appeal from the denial of relief in a state post-conviction proceeding,
Sellers v. State,
*1336
The court held, “although evidence of then existing but not yet presented or heard physical brain damage and MPD presents a valid ground for post-conviction relief under 22 O.S.1991, § 1080(d), it has been waived under 22 O.S.1991, § 1086.”
Sellers II,
In light of these holdings, the federal district court concluded each claim presented here satisfies exhaustion principles. Nonetheless, guided by then recently enacted provisions of the Antiterrorism and Effective Death Penalty Act of 1996 (AEDPA), the district court issued a certificate of appeala-bility only on the issue pertaining to the continuing threat aggravator and denied a certificate on the remaining issues.
Subsequent to that ruling, the Supreme Court held in
Lindh v. Murphy,
— U.S. -,-,
II.
A.
Petitioner asserts at the time of the murders he was suffering from Multiple Personality Disorder. He contends the State’s misapplication of its own procedure has denied him post-conviction due process because he has been barred from the opportunity to fully litigate this issue. Sellers urges the evidence of his brain injury and MPD is material; could not have been discovered before trial; is not cumulative; and creates a reasonable probability of changing the outcome of the trial. Yet, the Oklahoma Court of Criminal Appeals erroneously ruled the claim had been waived under Okla. Stat. tit. 22, § 1086 (1991). 2 He argues the federal district court’s review was clouded by that misapprehension.
Sellers asserts both state and federal courts overlooked that he had raised the issue in his
original
application for post-conviction relief, not a subsequent application. Thus, while
Hopkinson v. Shillinger,
The federal district court relied on
Herrera v. Collins,
The court examined affidavits previously submitted with Sellers’ state post-conviction petition attesting to his physical and mental state as well as the subject of MPD. Based on that review, the court stated:
There is significant neurological and psychological evidence that Petitioner suffers from MPD and some brain damage and a psychologist and psychiatrist who evaluated Petitioner in October of 1992 have opined that since or because Petitioner suffers from MPD, an alter personality likely or must have been in control at the time the murders were committed, if Petitioner committed them, and that the alter personality did not understand nor care about the nature of his acts nor whether they were right or wrong, or that it was likely that the alter did not know the difference between good and bad or right and wrong. But this evidence does not amount to a truly persuasive demonstration of actual innocence nor meet the extraordinarily high threshold of showing that a constitutional violation will occur if Petitioner is executed for a number of reasons,
(emphasis in original) (footnote omitted).
The court explained it rejected the newly discovered evidence because the expert opinions were based on examinations conducted more than six years after the crimes, and thus the reliability of the conclusions of which personality was in control was “diminished.” Moreover, the court pointed out the experts “offered no basis for their opinions that an alter personality must have been in control at the time of the murders.” Additionally, the court stated there was no evidence Sellers’ host personality was aware of or could not control the alter. Finally, the court noted:
[Tjhere is overwhelming evidence in the trial record that Petitioner committed the murders and that the personality in control of Petitioner immediately before, during and after the murders was the same, was cognizant of what he was doing and understood and appreciated the difference between right and wrong and the wrongful nature of this conduct.
The court continued, even if Sellers established he could not have discovered the MPD earlier but for the constitutional violation which prevented the discovery, he failed to show his actual innocence or that any reasonable juror would not have found even one aggravating circumstance in any of the murders.
B.
On appeal, Sellers maintains he presented to the district court overwhelming, undisputed evidence that at the time of his trial and direct appeal the clinical tests for discovering and confirming the presence of MPD had not been developed. Further, he provided evidence to establish that it usually takes several years and several incorrect diagnoses to determine a person suffers from MPD. The State submitted no opposing evidence.
We begin our analysis by noting the record is in a remarkable state. It firmly appears from the district court’s observation Petitioner’s claims are not fanciful; indeed, they are supported by significant evidence the person facing death for three murders is not the person who committed the crime. Summarized, the uncontroverted expert affidavit testimony is: (1) A quantitative electroencephalogram test (QEEG) disclosed Sellers has brain damage as a result of a closed head injury suffered as a child; (2) The QEEG dramatically changed with each of Sellers’ alter states, indicating the presence of at least three alter personalities; (3) An Evoked Potential Test (EPT), which relies upon biological signals from the body and cannot be falsified by the patient, showed multiple objective changes in brain function and reliably confirmed the QEEG; (4) A second series of tests and extensive interviews were conducted by a different physician who actually spoke to two of Sellers’ alter personalities; (5) Sellers suffered from MPD at the time of the killings; (6) One of Sellers’ alter personalities “must have been in executive control of [Sellers’] person or body” at those times; (7) There was only a limited awareness of MPD in the mental health community in 1987 when Sellers was tried; and (8) MPD is a “hidden disease” which generally takes seven years to confirm. In light of this evidence, the conundrum with which we are presented, however, is whether this claim of MPD based innocence can survive the threshold require *1338 ments of federal habeas corpus to render it justiciable.
This is a unique and profound case because it presents intertwined issues of habeas jurisprudence. Unwinding the knot into which the matter is tied provides us with the key to its resolution. Before setting ourselves to that task, however, we are constrained to observe the question of actual innocence predicated upon the actions of multiple personalities has a twist that affords no parallel that we have found.
Given the unusual context of this case, we believe other courts have begged the issue by ruling the proof of Sellers’ guilt is “overwhelming.” Indeed, if believed by a jury, Petitioner’s evidence of the culpability of an alter personality renders the person known as Sean Sellers actually innocent. Yet, we cannot reach that point because of the limited nature of federal habeas corpus and the precedent by which we are guided.
We must begin, as did the district court, with consideration of how claims of actual innocence fall within the scope of federal habeas corpus. It is settled that:
Claims of actual innocence based on newly discovered evidence have never been held to state a ground for federal habeas relief absent an independent constitutional violation occurring in the underlying state criminal proceeding.
This rule is grounded in the principle that federal habeas courts sit to ensure that individuals are not imprisoned in violation of the Constitution — not to correct errors of fact.
Herrera,
This is not to say that our habeas jurisprudence casts a blind eye toward innocence. In a series of cases culminating with Sawyer v. Whitley, ... we have held that a petitioner otherwise subject to defenses of abusive or successive use of the writ may have his federal constitutional claim considered on the merits if he makes a proper showing of actual innocence. This rule, or fundamental miscarriage of justice exception, is grounded in the “equitable discretion” of habeas courts to see that federal constitutional errors do not result in the incarceration of innocent persons .... But this body of our habeas jurisprudence makes clear that a claim of “actual innocence” is not itself a constitutional claim, but instead a gateway through which a habeas petitioner must pass to have his otherwise barred constitutional claim considered on the merits.
Id.
at 404,
evidence of innocence so strong that a court cannot have confidence in the outcome of the trial unless the court is also satisfied that the trial was free of non-harmless constitutional error, the petitioner should be allowed to pass through the gateway and argue the merits of his underlying claims.
[Moreover] the evidence must establish sufficient doubt about his guilt to justify the conclusion that his execution would be a miscarriage of justice unless his conviction was the product of a fair trial.
Schlup v. Delo,
Thus, the rule by which this case must be governed has several dimensions. First, the claim of innocence grounded in MPD itself is not a basis for federal habeas corpus no matter how convincing the evidence. 3 Second, the claim of innocence is merely the means by which an otherwise barred constitutional error affecting the fairness of the petitioner’s trial can be heard. Third, to allow a habeas court to reach that constitutional error, the claim of innocence must be of the magnitude that we can say no reasonable juror would have convicted Sean Sellers had it been presented at trial. These are very high barriers to Petitioner’s success.
The first hurdle Petitioner must overcome is that his principal constitutional argument does not revolve about trial error but about matters that occurred subsequently. He maintains the
Sellers II
court mistakenly barred him from airing his evidence of MPD because of its erroneous interpretation of an Oklahoma statute relating to post-conviction review.
See
Okla. Stat. tit. 22, § 1086. Assuming the contention is correct and the Oklahoma court mistakenly construed the statute, the error is one of state law not cognizable in habeas corpus because “federal habeas corpus relief does not lie for errors of state law.”
Lewis v. Jeffers,
Petitioner is further hampered by the fact no constitutional provision requires a state to grant post-conviction review.
Pennsylvania v. Finley,
C.
The nature of his newly discovered evidence, in the form of affidavits, already has been called into question. “In the new trial context, motions based solely upon affidavits are disfavored because the affiants’ statements are obtained without the benefit of cross-examination and an opportunity to make credibility determinations.”
Herrera,
We are not unmoved by the Petitioner’s dilemma. Nor are we unconvinced that given an opportunity by a state court he could not cast doubt on the propriety of the sentence he faces. Yet, granting him relief on these grounds is beyond the present scope of federal habeas corpus. He is not completely without recourse, however, because he appar *1340 ently still has access to Executive Clemency. See Okla. Const, art. VI, § 10; Okla. Stat. tit. 21, § 701.11a (Supp.1990). Nevertheless, we hold the district court did not err in its disposition of this issue.
III.
Petitioner next contends Oklahoma’s “continuing threat” aggravating circumstance is unconstitutionally vague and overbroad and therefore unconstitutionally applied. Subsequent to the filing of briefs in this case, we held to the contrary in
Nguyen v. Reynolds,
IV.
At the penalty stage of the trial, the defense sought to present the testimony of a law professor who, according to the offer of proof, would testify that juveniles were developmentally different from adults. The state judge refused to allow the testimony. Petitioner now contends the refusal amounted to a denial of his right to present mitigating evidence contrary to the provisions of Okla. Stat. tit. 21, § 701.10 (1981),
4
and
Eddings v. Oklahoma,
He’s only 17, but when he picked up that .357 he became a man. And he walked out and he blew Robert Paul Bower away. And when he picked up that .44 Special, he became a man again. And he walked in and he blew Lee and Vonda Bellofatto into another world. He’s acted like a man, he’s going to have to stand up here like a man.
Thus, Petitioner maintains, the State was permitted to argue about his adulthood, but the defense was not permitted to counter that argument with expert testimony. He asserts this prohibition eviscerates the use of age as a mitigating factor by removing any meaning from the concept. He adds that the error was compounded when the jury was instructed it was to determine the mitigating effect of his age. Therefore, Petitioner concludes the state court denied him due process in excluding all of the testimony with the observation most people know the difference between youths and adults.
Relying in part upon
Lockett v. Ohio,
From this record, the district court gleaned the proffered testimony is “best characterized as a policy argument as to why the death penalty for juveniles should be abolished — an argument appropriately directed to the Oklahoma Legislature.” More importantly, the court noted, the proffered testimony was not “relevant mitigating evidence of the character and record or background of the defendant and the circumstances of the offense.” The court observed the developmental difference between adults and juveniles “is a fact within the knowledge which jurors possess in common with other persons.” Therefore, the court reasoned when this knowledge is coupled with the state court’s instruction that the jury could employ its general knowledge in arriving at the sentence, the mitigating effect of the developmental differences was placed before the jury, citing
Graham v. Collins,
V.
Petitioner next maintains the state trial court unconstitutionally limited his voir dire of the jury on the subject of the death penalty. The court sustained the State’s objection to defense counsel’s asking prospective jurors whether the juror would consider the youth of the defendant as a mitigating factor, making it impossible, he contends, to carefully exercise his peremptory challenges. In contrast, he complains the trial court permitted the prosecutor to ask jurors whether they would be offended to have “[me] as district attorney seeking the death penalty for a 17-year old_” Further, when the prosecutor told the jury it could find there were no mitigating factors, it underscored the State’s argument that youth is not a proper mitigating consideration. Petitioner urges the court’s refusal to permit his line of inquiry is contrary to
Eddings.
He argues if the Constitution allows voir dire on racial attitudes in a ease involving an interracial incident,
Turner v. Murray,
In rejecting this contention, the federal district court found the voir dire “constitutionally adequate” because jurors were asked individually and collectively whether they would consider life imprisonment' or whether they would automatically impose a death sentence if Sellers were found guilty. The court observed
Wainwright v. Witt,
In this case, defense counsel attempted to inquire into whether prospective jurors would find specific facts mitigating. This effort is not equatable to whether a juror would refuse to consider mitigation of any kind. As noted by the district court, a juror of that mind-set would be excusable for cause, but what Petitioner was attempting to *1342 do was to ferret out information that would aid in the exercise of his peremptory challenges. So long as the voir dire is adequate to detect jurors who could not be impartial, a trial court is not required by the Constitution to grant such a searching inquiry. Id. at 1114. Indeed, the breadth of questions eliciting jurors’ opinions about the death penalty itself must lie within the discretion of the trial judge. In this instance, we agree with the district court the voir dire was adequate to serve the constitutional mandate of providing an impartial jury.
VI.
Petitioner contends the Confrontation Clause was violated when the trial judge closed an area of inquiry to defense counsel during cross-examination of the State’s psychological expert witness, Dr. Herman Jones. Defense counsel attempted to question whether Dr. Jones would change his opinion of Sellers’ state of mind after consideration of certain of Sellers’ specific past writings. The district court sustained the State’s objection because the court had already held the documents contained inadmissible hearsay; therefore, the testimony would also be inadmissible. Counsel made an offer of proof that the writings, which Dr. Jones had not examined, would bear directly on the basis of the expert’s opinion.
The federal district court rejected this claim, concluding Petitioner’s rights to due process and to compel favorable testimony were not violated. Habeas relief is not available on this ground unless the Petitioner can show his whole trial was rendered fundamentally unfair by the limitation of the cross-examination.
See Donnelly v. DeChristoforo,
As did the district court, we have reviewed the record of the direct and cross-examination of Dr. Jones, and we see nothing in the limitation of examination which meets the required tests. Because the opinion expressed by Dr. Jones was diametrically opposed to that of Petitioner’s expert, Dr. Krimsky, the purpose for the cross-examination was to call into question the basis upon which Dr. Jones arrived at his diagnosis. Although Dr. Jones stated having access to Sellers’ writings would aid in his analysis, we are unsure whether the writings would affect his opinion. Moreover, defense counsel conducted a thorough examination of Dr. Jones’ evaluation of Sellers’ condition and the various points on which Dr. Jones and Dr. Krim-sky differed. Even assuming, for the sake of review, the materiality of the writings, we simply cannot say the record discloses the denial of an effective cross-examination of the State’s expert. Nor do we believe the restriction on cross-examination had a substantial or direct influence on the verdicts.
VII.
Because Oklahoma law permits introduction of
any
mitigating evidence, Petitioner urges it was error for the trial court to prevent his witness, Ms. Betsey Payne, the executive secretary of the Oklahoma Pardon and Parole Board, from testifying that a person sentenced to life imprisonment could not be considered for parole for at least fifteen calendar years and is not eligible to receive good time or other credits. Left with the decision then to sentence him to death or to life, believing that meant he would be out in a short time, the jury was deprived of vital mitigating evidence to inform its choice. Petitioner relies on
Simmons v. South Carolina,
Once again, our consideration of this issue is foreclosed by
Nguyen v. Reynolds,
VIII.
Petitioner contends the state district attorney made comments during closing argument which he believes violated his due process rights and unfairly minimized the jury’s sense of responsibility for the imposition of the death penalty. Petitioner states the district attorney “kept referring to himself in the third person, and was sending a strong signal to the jury that it was the district attorney who approved of the death penalty, and that many hurdles had to be jumped before a capital murder trial could ever occur.” Petitioner also observes, “he even suggested to the jury that had there been only one incident, he would not have sought the death penalty.” Indeed, the prosecutor told the jury, had it not been for the multiple crimes, “You probably wouldn’t be here right now.”
The district court found “in the context of the entire final argument” the statements were “not reasonably susceptible to an interpretation that the district attorney or some other authority, not the jury, was the final or true arbiter of [Sellers’] punishment.” Thus, the court concluded, unlike those in
Caldwell v. Mississippi,
Viewing the record with charity, we note the prosecutor’s hyperbole may be regarded as colorful. It is not, however, the stuff from which anyone could perceive an offer to share the burden of the ultimate decisions in this case. Thus, we agree with the district court that the district attorney did not run afoul of
Caldwell.
We conclude there is no merit in Petitioner’s argument.
See Hopkinson,
IX.
Finally, Petitioner contends he was denied his right to the effective assistance of counsel. In a double faceted attack, Petitioner argues he was denied effective assistance of trial counsel because his attorney did not discover the evidence of his brain injury and MPD. Alternatively, Petitioner argues his attorney “woefully underemphasized the best evidence for an insanity verdict” by choosing to focus on his Satanism and eultism rather than his inability to distinguish right from wrong. He concludes by asserting he was prejudiced by the state statute which limited him to $750 with which to obtain psychiatric assistance. 5
In light of Petitioner’s own evidence that MPD could not have been discovered at the time of his trial, his Sixth Amendment argument based on trial counsel’s failure to discover the defense sounds with a hollow ring, notwithstanding the spin put on it by the Oklahoma court. Having provided us with an uncontroverted record that the illness could not have been discovered at the time of trial, we will not accept Petitioner’s postulate here.
The district court undertook a thorough examination of the record in light of the contention trial counsel failed to properly assert a “traditional” insanity defense and concluded counsel’s strategy was not unsound, relying upon
Strickland v. Washington,
Claims of ineffective counsel are mixed questions of law and fact which we review de novo.
See Williamson v. Ward,
With these thoughts in mind, we agree with the conclusion reached by the district court. Although the benefits of hindsight make it easy to suggest how better issues could have been raised, we believe it is clear trial counsel functioned appropriately within the ambit of available evidence and his performance was not unreasonable. We hold, therefore, Petitioner has failed to satisfy his burden of persuasion. Moreover, having rested his claim of ineffective appellate counsel on failure to assert trial counsel was incompetent for not raising the MPD defense, we believe our conclusions here summarily dispatch Petitioner’s argument on that score.
Finally, Petitioner argues here, as he did in the district court, the limitation on available funds for psychiatric assistance deprived him of the opportunity to have further significant tests performed which the evidence of his brain damage should have indicated. The district court carefully analyzed this issue and found, first, there was no evidence in the record reflecting the defense expert did not consider the possibility of Petitioner’s organic brain disorder or further specific testing was required but not performed because of inadequate funding. Moreover, Petitioner admitted routine psychological examinations given to criminal defendants did not include such tests. The court earefidly observed, however, even assuming the expert was inadequate in his clinical observations and failed to require necessary testing, there is nothing in the record suggesting trial counsel was aware of the deficiency. When coupled with the Petitioner’s lack of “outward manifestations” of organic brain damage or other evidence of psychological disorder, the routine exclusion of certain testing and the presumption of reasonable professionalism to be accorded counsel, the district court failed to find a Sixth Amendment violation based on the suggested lack of funding. Unable to add to the careful analysis of the district court, we simply concur in its reasoning and conclusions. Concluding counsel was not deficient, we need not examine whether Petitioner was prejudiced by his acts.
X.
Petitioner states our refusal to grant his motion to file a brief in excess of seventy-five pages deprived him of the opportunity to brief other issues. Believing the number of issues he was able to address is as much a function of counsel’s loquaciousness as it is our limitation on the number of pages available for discourse, we have nonetheless examined the record of the additional matters presented to the district court and the decisions made on those issues. Suffice to say that examination leads us to conclude the district court did not err in any respect. The judgment of the district court is AFFIRMED.
Notes
. The Court of Criminal Appeals stated:
Furthermore, the evidence presented at trial amply supported the jury's finding of this circumstance. Prior to killing the convenience store clerk, appellant showed Howard [his friend] the gun he was carrying and told him, “I want to see what it feels like to kill somebody.” So he did. In the following months, appellant bragged of his conduct to friends and co-workers. Then, six months after the first homicide, he shot and killed his own parents. He took precautions to make sure that his parents were dead and to make sure no one had heard the shots. He committed the murders in his under shorts so that no blood could spatter on his clothes. He intended to use Howard as an alibi and conceived an elaborate plan to "discover” his parents dead in bed. The repeated incidences of violence and the calloused manner of appellant’s actions in this case support finding this aggravating circumstance in all three homicides.
Sellers v. State,
. That section entitled "Subsequent Application” is part of the Post-Conviction Procedure Act and states, in part:
All grounds for relief ... must be raised in his original, supplemental or amended application. Any ground finally adjudicated or not so raised, or knowingly, voluntarily and intelligently waived in the proceeding that resulted in the conviction or sentence or in any other proceeding the applicant has taken to secure relief may not be the basis for a subsequent application unless the court finds a ground for relief asserted which for sufficient reason was not asserted or was inadequately raised in the prior application.
(emphasis added).
. Interestingly, the claim is grounds for post-conviction relief under Oklahoma law.
See Seil-ers v. State,
. That section states:
Upon conviction ... of guilt of a defendant of murder in the first degree, the court shall conduct a separate sentencing proceeding to determine whether the defendant should be sentenced to death, life imprisonment without parole or life imprisonment.
In the sentencing proceeding, evidence may be presented as to any mitigating circumstances or as to any of the aggravating circumstances enumerated in Section 701.7 et seq. of this title.
(italics added).
. Although Petitioner also advances a somewhat unclear argument that the Oklahoma Court of Criminal Appeals incorrectly ruled on his ineffective counsel claim, we see that contention presented to us in the posture of an invitation to review the propriety of the state court’s holding. We decline the invitation as beyond the scope of 28 U.S.C. § 2254.
