Brumfield v. Cain
The Court ruled that a Louisiana court unreasonably assessed the facts when it denied a death-row inmate a hearing on whether he was intellectually disabled and therefore ineligible for execution, without giving him a hearing or funds to develop evidence.
The decision sends the case back to federal court so the inmate's claim can finally be considered on the merits, reinforcing that federal habeas courts can step in when a state court's factual assessment of a death-penalty claim was unreasonable.
“Accounting for this margin of error, Brumfield’s reported IQ test result of 75 was squarely in the range of potential intellectual disability.”
The majority explains why a state court's reliance on a single IQ score to reject the claim was unreasonable.
How it got here: A Louisiana trial court denied Brumfield a hearing; a federal district court granted habeas relief; the Fifth Circuit reversed, and Brumfield asked the Supreme Court to review that reversal.
The Case in Depth
What happened
Kevan Brumfield was sentenced to death in Louisiana for murdering an off-duty police officer. After the Supreme Court barred executing intellectually disabled people in Atkins v. Virginia, Brumfield asked a Louisiana court for a hearing to prove he was intellectually disabled, pointing to trial evidence of a low IQ score, a fourth-grade reading level, psychiatric hospitalizations, and special education placement.
The question before the Court
Was a Louisiana death-row inmate entitled to a hearing on whether he was too intellectually disabled to be executed, even though a state court had turned him down without a hearing or funding to investigate?
The Court's answer
Yes — the Court ruled that the Louisiana trial court's decision to deny Kevan Brumfield a hearing rested on an unreasonable reading of the facts, so he was entitled to have his intellectual-disability claim heard in federal court. The state court had treated his IQ score of 75 as proof he couldn't be intellectually disabled, ignoring that IQ tests carry a margin of error and that Louisiana's own sources treated a 75 as consistent with such a diagnosis.
The state court also wrongly concluded the trial record showed no impairment in daily-functioning skills, when in fact it included evidence of special education placement, a suspected learning disability, and childhood psychiatric hospitalization — all gathered before intellectual disability was even legally relevant to his case. Under Louisiana's own low bar for granting a hearing, that evidence was enough to require one.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Death-row inmates raising intellectual-disability claims under Atkins v. Virginia now have a concrete example of how federal courts should scrutinize state courts' factual findings when those courts deny a hearing without letting inmates gather supporting evidence like updated IQ testing or expert reports on adaptive functioning.
What changes now
The case returns to the federal courts of appeals for further proceedings, meaning Brumfield's Atkins claim can now be considered on the merits rather than being cut off at the threshold. This is a final merits ruling on the narrow procedural question of whether the state court's factual findings were unreasonable, not a final decision on whether Brumfield is in fact intellectually disabled.
What this does not decide
The Court did not decide whether Brumfield is actually intellectually disabled or must be spared execution — only that the state court's factual findings denying him a hearing were unreasonable under federal habeas law. It also left unresolved how a related, more deferential habeas standard interacts with this one.
Concurrences and dissents
Dissent — Justice Thomas
“Federal collateral review of state convictions interrupts the enforcement of state criminal laws and undermines the finality of state-court judgments.”Thomas's opening objection to the majority's use of federal habeas review to override the state court.
Justice Thomas argued the state court's factual findings on Brumfield's IQ, adaptive skills, and personality disorder were all supported by the record, and that the majority was really disagreeing with a legal application of facts to Louisiana's Atkins standard, not with genuine factual errors. He would have denied relief entirely, calling the majority's approach a distortion of federal habeas law that disrespected state sovereignty.
Dissent — Justice Alito
Justice Alito joined all of Justice Thomas's dissent except the lengthy Part I-C describing the accomplishments of the victim's son, explaining that while that account was inspiring, he did not think it was essential to the legal analysis of the case.
How the Court got there
The legal reasoning, step by step
- Federal habeas law lets a court override a state court's decision if it was based on an unreasonable determination of the facts in light of the evidence presented, a standard that requires substantial deference but does not mean rubber-stamping every state finding.
- The Court examined the state trial court's finding that Brumfield's IQ score of 75 ruled out intellectual disability, and concluded this was unreasonable because IQ tests carry a margin of error and the very sources Louisiana courts relied on treat a score of 75 as consistent with intellectual disability.
- The Court then examined the state court's finding that Brumfield showed no impairment in adaptive skills — his ability to function in daily life — and found this unreasonable too, since the trial record included evidence of special education placement, a suspected learning disability, and childhood psychiatric hospitalization.
- The Court noted that under the low threshold Louisiana itself set for granting a hearing (raising a reasonable doubt about intellectual disability, not proving it outright), this trial evidence was more than enough to warrant a hearing, especially since it was gathered years before intellectual disability became legally relevant.
- Having found the factual-unreasonableness standard satisfied, the Court did not need to separately decide whether the state court also violated clearly established law by denying funding for further investigation.