Riley Noel was convicted of three counts of capital murder and was sentenced to death. After unsuccessfully attempting to overturn his convictions and sentences in the Arkansas state courts, Mr. Noel petitioned for habeas corpus relief. See 28 U.S.C. § 2254. The district court 1 denied the petition and granted a certificate of appealability on four of Mr. Noel’s claims. We affirm.
I.
Mr. Noel first claims that defense counsel was ineffective at trial for asking Mr. Noel on direct examination whether counsel had advised him to exercise his fifth amendment right to remain silent, a question that Mr. Noel answered in the affirmative. This exchange, Mr. Noel’s argument goes, effectively destroyed any credibility that he might have had with the jury. The Arkansas Supreme Court rejected this claim on the ground that the exchange was designed to impress the jury with petitioner’s sincerity, a finding that was supported by counsel’s post-conviction hearing testimony and by counsel’s remarks during closing argument.
See Noel v. State,
In order to prevail on a claim of ineffective assistance, a petitioner must show that counsel acted unreasonably.
See Strickland v. Washington,
II.
Mr. Noel next contends that he is entitled to relief because of the Arkansas Supreme Court’s failure on direct appeal to conduct an automatic review of the entire record — as opposed to the abstracted record — for prejudicial error, as required by that court’s own decision in
State v. Rob
*503
bins,
Mr. Noel evidently advances two separate arguments for applying
Robbins
retroactively to Ms case. First, he argues that the kind of review demanded by the
Robbins
opinion is “required by the Constitution.” Mr. Noel cites many cases that taken together can reasonably be understood as standing for the proposition that a defendant convicted of the death penalty has a constitutional right to an opportunity for “meaningful appellate review,”
see, e.g., Pulley v. Harris,
Mr. Noel’s secondary argument is that Arkansas law requires that
Robbins
be applied retroactively to his case. This appears to us to be an incorrect statement of the applicable Arkansas law, but even if we accepted his argument it would not benefit Mr. Noel because “federal habeas corpus relief does not lie for errors of state law.”
Lewis v. Jeffers,
III.
Mr. Noel raises a claim based on what he calls newly discovered evidence that he suffers from brain abnormalities. He argues that a new diagnostic tool commonly referred to as a “SPECT scan” now permits the medical community to diagnose brain abnormalities in a way that was not possible at the time of his trial. A preliminary SPECT scan conducted nearly five years after Mr. Noel’s sentencing indicated that he might be suffering from such brain abnormalities. Further SPECT scans would be necessary, however, before the precise nature of his brain abnormalities could be determined, and the district court refused to authorize these before proceeding to judgment on the habeas petition. Mr. Noel contends that he is entitled to pursue additional testing and that the “newly discovered evidence” resulting from those tests would constitute mitigating evidence that would likely have led a jury to sentence him to a term of imprisonment rather than death.
At the outset, we note that the medical' evidence that Mr. Noel now possesses is not substantially better than the evidence of brain abnormality that he produced at the sentencing phase of his trial. But even if Mr. Noel currently had substantial evidence that he had a brain abnormality, his claim would necessarily fail whatever the nature of that abnormality. In order to obtain habeas relief, a prisoner must show that he or she “is in custody in violation of the Constitution or laws or treaties of the United States.” 28 U.S.C. § 2254(a). Despite our best efforts, we cannot discern how the mere unavailability of a particular medical technology at the time of sentencing could violate Mr. Noel’s rights under either the Constitution or federal law. It is important to bear in mind, moreover, that there is no constitutional right to resentencing based on newly discovered evidence.
In this case, there is no contention that the state prevented Mr. Noel from undergoing medical testing or otherwise suppressed relevant mitigating evidence.
Cf. Brady v. Maryland,
We think, moreover, that Mr. Noel’s argument that the “cause and prejudice” standard is somehow applicable to this claim misses the mark. A showing of cause and prejudice by a habeas petitioner merely disposes of procedural barriers so that a court may address the merits of an alleged constitutional violation that was defaulted.
See Murray v. Hvass,
It is true that in
Herrera v. Collins,
The petitioner in
Herrera
claimed that he was actually innocent of the crime for which he was convicted, but Mr. Noel contests only the appropriateness of his death sentence. Given the reluctance of the Supreme Court to extend relief to defendants who might prove their “actual innocence,” and its observation that “[cjlaims of actual innocence pose less of a threat to scarce judicial resources and to principles of finality and comity than do claims that focus solely on the erroneous imposition of the death penalty,”
Schlup v. Delo,
The evidence that Mr. Noel believes that he could produce through further SPECT analysis and an evidentiary hearing certainly could have been weighed by the jury if it had been offered at trial, but whatever in fact it might have turned out to be would necessarily be insufficient, absent some constitutional defect in the trial, to support a claim for habeas corpus relief. Since additional evidence could not have supported his habeas corpus claim, the district court did not abuse its discretion by cutting off Mr. Noel’s discovery. Mr. Noel’s claim for relief on this ground must therefore fail.
IV.
At the penalty phase of Mr. Noel’s trial, Mary Hussain testified to the impact that the deaths of her children had had on her life and on her family’s life. Ms. Hussain has attested that at the time she testified *505 she was in favor of the death penalty for Mr. Noel. Ms. Hussain now says that she has had a change of heart about the death penalty and is willing to testify that she would rather see Mr. Noel serve a life sentence. Mr. Noel claims that he is entitled to habeas relief on the basis of the “recantation” of Ms. Hussain’s testimony.
Mr. Noel contends that the proper standard by which to adjudge this claim is to determine whether the newly discovered evidence “would probably produce an acquittal on retrial,” citing
Mastrian v. McManus,
V.
For the reasons indicated, we affirm the district court’s denial of Mr. Noel’s petition.
Notes
. The Honorable Susan Webber Wright, Chief Judge, United States District Court for the Easlern District of Arkansas.
