Whether a state prisoner may obtain federal habeas relief solely because newly discovered evidence allegedly proves his actual innocence, without identifying an independent constitutional error in the underlying trial.
Holding
No. A freestanding claim of actual innocence based only on newly discovered evidence is not ordinarily cognizable in federal habeas corpus.
Reasoning
Federal habeas corpus traditionally safeguards against custody imposed in violation of the Constitution, not factual error as such. Once a defendant has received a fair trial and has been convicted beyond a reasonable doubt, the presumption of innocence no longer applies; legally, Herrera came before the Court as a convicted murderer rather than as a person presumed innocent.
The Court distinguished Jackson v. Virginia, which permits habeas review of whether the trial evidence was constitutionally sufficient to support a conviction. Jackson addresses an independent constitutional violation, is limited to the trial record, and asks whether any rational factfinder could convict—not whether later evidence persuades a federal judge that the prisoner is factually innocent.
The Court also distinguished the habeas “fundamental miscarriage of justice” doctrine. Actual innocence can serve as a gateway allowing review of an otherwise procedurally barred constitutional claim, but it is not itself the constitutional claim. Herrera invoked innocence as his sole basis for relief rather than as a gateway to review a separate trial error.
Allowing federal courts to relitigate guilt years after a constitutionally adequate state trial would seriously disrupt finality, federal-state relations, and the reliability of adjudication. Time erodes memories and disperses witnesses, so a delayed retrial may be less—not more—reliable than the original trial.