Thompson v. Oklahoma, 487 U.S. 815 (1988), is the Supreme Court decision holding that the Eighth Amendment forbids executing anyone for a crime committed before age sixteen. The Court vacated the death sentence of William Wayne Thompson, who was fifteen when he took part in a murder, by a 5–3 vote on June 29, 1988. Justice Kennedy did not participate because he had joined the Court too late to hear arguments.1Justia U.S. Supreme Court Center. Thompson v. Oklahoma The ruling was the first in a line of cases that steadily narrowed the harshest punishments available against juvenile offenders and eventually barred the death penalty for anyone under eighteen.
How a Fifteen-Year-Old Ended Up on Death Row
On January 23, 1983, William Wayne Thompson and three others murdered Charles Keene, Thompson’s former brother-in-law, in Grady County, Oklahoma. The group abducted Keene, beat him, shot him twice, and threw his body into a river.2Oklahoma Court of Criminal Appeals. Thompson v. State Thompson was fifteen.
Oklahoma law classified Thompson as a “child,” so the district attorney petitioned to certify him for trial as an adult. The trial court granted the petition, which exposed Thompson to the full range of adult punishments, including death.3Cornell Law School. Thompson v. Oklahoma A jury convicted him of first-degree murder and fixed the sentence at death, and the Oklahoma Court of Criminal Appeals affirmed.2Oklahoma Court of Criminal Appeals. Thompson v. State Thompson took the case to the Supreme Court on a single question: whether putting a person to death for a crime committed at fifteen is cruel and unusual punishment.
The Plurality’s Reasoning
Justice John Paul Stevens, joined by Justices Brennan, Marshall, and Blackmun, wrote for a four-justice plurality that would have drawn a categorical line at age sixteen.1Justia U.S. Supreme Court Center. Thompson v. Oklahoma The plurality worked within the framework of “evolving standards of decency that mark the progress of a maturing society,” borrowed from Trop v. Dulles.
Two kinds of evidence carried the analysis. The first was what state legislatures had done. Every one of the eighteen states that had squarely addressed a minimum age for capital punishment had set it at sixteen or older. Add the twelve states that had abolished the death penalty outright, and thirty states barred executing anyone under sixteen.4Legal Information Institute. U.S. Constitution Annotated – Amdt8.3.9.7 Minors and the Death Penalty The second was what juries had actually done. Federal statistics for 1982 through 1986 showed 1,393 death sentences against more than 82,000 homicide arrests, and only five of those sentences went to defendants under sixteen. No one under sixteen had been executed in the United States since 1948.
The plurality then tested the sentence against the purposes of the death penalty. Retribution requires punishment proportional to personal responsibility, and a fifteen-year-old’s diminished culpability makes death disproportionate. Deterrence fares no better, because teenagers weigh long-term consequences less reliably than adults, so the threat of execution has little practical grip on their conduct. Stevens also pointed to foreign practice, noting that the United Kingdom, New Zealand, Canada, most of Western Europe, and even the Soviet Union barred juvenile executions.1Justia U.S. Supreme Court Center. Thompson v. Oklahoma
Justice O’Connor’s Narrower Fifth Vote
Justice O’Connor supplied the fifth vote to vacate the sentence but refused to sign onto the plurality’s categorical rule. She wrote that “this conclusion should not unnecessarily be adopted as a matter of constitutional law without better evidence than is before the Court.”3Cornell Law School. Thompson v. Oklahoma
Her reasoning was procedural rather than substantive. Oklahoma had a general death penalty statute and a separate juvenile certification procedure, but nothing in state law explicitly authorized capital punishment for a fifteen-year-old. Given the special deliberation the Eighth Amendment demands in capital cases, O’Connor would not infer that the legislature meant to make someone that young eligible for execution unless it said so. The practical effect for Thompson was the same, but the door stayed open: a state that passed a statute expressly authorizing execution at fifteen might survive review under her approach. And the opinion said nothing about sixteen- and seventeen-year-olds.
The Dissent
Justice Scalia, joined by Chief Justice Rehnquist and Justice White, rejected the majority’s reading of the national mood. Nineteen death-penalty states set no minimum age, and federal law itself allowed juveniles as young as fifteen to be tried as adults. On those numbers, Scalia argued, there was no consensus against executing young offenders certified for adult trial.1Justia U.S. Supreme Court Center. Thompson v. Oklahoma
He also attacked the method. The plurality, he wrote, had converted “a statistical rarity of occurrence into an absolute constitutional ban.” Rare jury verdicts showed only that such sentences were uncommon, not that society had rejected them. Underneath the disagreement was a larger one about the Court’s role: whether justices should lead in defining evolving standards of decency or wait until legislatures had clearly moved.
What Thompson Left Open, and How Stanford and Roper Closed It
Because O’Connor would not join a categorical rule, Thompson resolved only the case of offenders under sixteen. The next year, in Stanford v. Kentucky, 492 U.S. 361 (1989), the Court took up sixteen- and seventeen-year-olds and reached the opposite result. By 5–4, it held that executing offenders that age did not violate the Eighth Amendment. Applying the same consensus test, Justice Scalia’s majority found that of the thirty-seven states that allowed capital punishment, only fifteen barred it for sixteen-year-olds and only twelve for seventeen-year-olds. That, the Court said, fell short of a national judgment, and low execution rates were “no proof of a categorical aversion.”5Justia U.S. Supreme Court Center. Stanford v. Kentucky
For sixteen years, Thompson and Stanford stood together as a two-tier rule: no executions for crimes committed under sixteen, but states could still execute offenders who were sixteen or seventeen when they killed. That split ended in 2005. In Roper v. Simmons, 543 U.S. 551, the Court held 5–4 that the Eighth and Fourteenth Amendments forbid the death penalty for any offender under eighteen at the time of the crime. Justice Kennedy’s majority opinion expressly overruled Stanford.6Justia U.S. Supreme Court Center. Roper v. Simmons
Roper identified three ways juveniles differ from adults in ways that reduce culpability: immaturity and impulsivity, greater vulnerability to peer pressure and outside influence, and a character still in formation. On those grounds, neither retribution nor deterrence could justify a death sentence for a juvenile offender.6Justia U.S. Supreme Court Center. Roper v. Simmons The analytical machinery came from Thompson: legislative trends, jury behavior, international practice, and diminished culpability. What Thompson had assembled with only four votes for a categorical rule, Roper turned into settled constitutional law.
Life Without Parole After the Death Penalty Was Off the Table
Once juveniles could no longer be executed, the fight moved to the next-harshest sentence. Three later decisions carried Thompson’s core idea, that young people are constitutionally different for sentencing purposes, into life-without-parole cases.
Graham v. Florida (2010) held 6–3 that a juvenile offender cannot be sentenced to life without parole for a non-homicide crime. Such an offender must have “some meaningful opportunity” for release based on demonstrated maturity and rehabilitation.6Justia U.S. Supreme Court Center. Roper v. Simmons Miller v. Alabama (2012) then struck down mandatory life-without-parole sentences for juvenile homicide offenders. Miller did not ban the sentence itself, but it required an individualized hearing that considers the offender’s youth and circumstances before it can be imposed.7Justia U.S. Supreme Court Center. Miller v. Alabama Montgomery v. Louisiana (2016) made Miller retroactive, treating it as a substantive constitutional rule reaching prisoners already serving mandatory juvenile life-without-parole sentences. States could comply either by resentencing those prisoners or by making them parole-eligible.8Justia U.S. Supreme Court Center. Montgomery v. Louisiana
What Happened to William Wayne Thompson
After the Supreme Court vacated his death sentence, Thompson’s punishment was modified to life with the possibility of parole, and he remained in Oklahoma custody for decades. In October 2025, more than forty-two years after his arrest at fifteen, he was released from prison.