Whether the Eighth Amendment permits a sentencing scheme that mandates life imprisonment without parole for offenders who were under 18 when they committed homicide.
Holding
No. The Eighth Amendment forbids mandatory life-without-parole sentences for juvenile homicide offenders.
Reasoning
The Eighth Amendment embodies proportionality: punishment must be graduated and proportioned to both the offender and the offense. The Court joined two strands of its precedent: cases recognizing that juveniles have diminished culpability for purposes of the harshest punishments, and capital-sentencing cases requiring individualized consideration before a defendant receives the most severe sanction.
Roper v. Simmons and Graham v. Florida establish that children differ constitutionally from adults in sentencing. Juveniles generally lack maturity and an adult sense of responsibility; are more vulnerable to family, peer, and environmental pressures; and have characters that are less fixed. Those traits make youthful offenders less blameworthy and more capable of change, even when their crimes are grave.
Those differences weaken the usual justifications for the harshest punishment. Retribution is less compelling because a juvenile is less culpable; deterrence is less effective because adolescents are less likely to calculate consequences; and a judgment that a child is permanently incorrigible sits uneasily with youth's capacity for maturation and rehabilitation.
Graham had categorically barred life without parole for juvenile nonhomicide offenders and treated that sentence as akin to death for a child. Although Graham's categorical rule did not extend to homicide, its central premise did: youth must matter when the State imposes a sentence that ensures the offender will die in prison.
The Court's capital cases also require individualized sentencing because a sentencer must be able to consider the defendant's character, record, and mitigating circumstances. Youth is especially important mitigation. A mandatory life-without-parole statute instead treats all juvenile homicide offenders alike: a 14-year-old like a 17-year-old, an accomplice like a shooter, and a child from an abusive home like one from a stable home.
Mandatory schemes prevent consideration of a juvenile's age, immaturity, family and home environment, role in the offense, peer pressure, ability to navigate police and plea negotiations, and prospects for rehabilitation. They therefore create an unacceptable risk that a child will receive a disproportionate lifetime sentence.
The Court did not categorically ban life without parole for juveniles convicted of homicide. But it stressed that such sentences should be uncommon because it is difficult to distinguish a juvenile whose crime reflects transient immaturity from the rare juvenile whose crime reflects irreparable corruption.