Miller v. Alabama
The Court ruled that states cannot automatically sentence a young teenager convicted of murder to life in prison without any chance of parole. Judges and juries must first be allowed to consider the offender's youth and other circumstances before imposing that punishment.
The decision builds on earlier rulings limiting harsh punishments for juveniles, and it means thousands of existing mandatory sentences for people who committed murder as children may need to be reconsidered.
“By making youth (and all that accompanies it) irrelevant to imposition of that harshest prison sentence, such a scheme poses too great a risk of disproportionate punishment.”
The majority explains why mandatory life without parole for juveniles violates the Eighth Amendment.
How it got here: Both juveniles were convicted and given mandatory life-without-parole sentences; state appellate courts upheld the sentences, and the Supreme Court agreed to review both cases together.
The Case in Depth
What happened
Two 14-year-olds, Kuntrell Jackson in Arkansas and Evan Miller in Alabama, were each convicted of murder and automatically sentenced to life in prison without parole because state law required that sentence for their crimes. Jackson took part in a robbery during which an accomplice shot the clerk; Miller and a friend beat and killed a neighbor and set his trailer on fire. Neither had any judge or jury weigh their age or personal circumstances before sentencing.
The question before the Court
Can a state force a judge to sentence a 14-year-old convicted of murder to life in prison with no chance of parole, with no other option allowed?
The Court's answer
No — the Court ruled that states cannot make life without parole an automatic, mandatory punishment for juveniles convicted of murder. Judges or juries must first be given the chance to consider the offender's youth, family background, and the circumstances of the crime before deciding whether that harshest possible sentence is appropriate.
The Court reached this conclusion by combining two existing lines of cases: rulings recognizing that children are less culpable than adults, and rulings requiring individualized consideration before imposing a death sentence. States remain free to sentence a juvenile murderer to life without parole, but only after weighing these individual factors, not as a one-size-fits-all rule.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Roughly 2,000 people serving mandatory life-without-parole sentences for murders committed as juveniles could eventually get new sentencing hearings where a judge considers their age and background. Going forward, states can still impose life without parole on juvenile murderers, but only case-by-case, not as an automatic, one-size-fits-all punishment.
What changes now
The Court reversed the lower courts and sent both cases back for further proceedings. Judges in Arkansas and Alabama must now hold new sentencing proceedings that allow consideration of the offenders' youth and circumstances before deciding whether life without parole is appropriate. The ruling is a final merits decision, though it left open whether a categorical ban on life without parole for young juveniles is required and did not decide the separate question of retroactivity for already-sentenced prisoners.
What this does not decide
The Court did not decide whether the Eighth Amendment categorically bars life without parole for juveniles altogether, or whether states must guarantee eventual release. It held only that sentencers must have the opportunity to consider youth before imposing that penalty; discretionary life-without-parole sentences for juvenile murderers remain permissible.
Concurrences and dissents
Concurrence — Justice Breyer
Justice Breyer agreed with the majority but argued that under Graham's logic, a juvenile who neither killed nor intended to kill cannot be sentenced to life without parole at all, even with individualized sentencing, because he has 'twice diminished' moral culpability. He argued this reasoning should apply directly to Jackson on remand, since the jury never found that he killed or intended to kill.
Dissent — Justice Roberts
Chief Justice Roberts argued the punishment is not 'unusual' because most jurisdictions require it and thousands of prisoners already serve it, so there is no objective basis to call it cruel and unusual. He contended the majority's reasoning does not actually follow from Roper and Graham, both of which expressly limited themselves to different contexts, and warned the decision opens the door to further limits on legislative sentencing authority.
Dissent — Justice Thomas
Justice Thomas argued that both lines of precedent the majority relies on, categorical proportionality review and mandatory-death-penalty bans, are inconsistent with the Eighth Amendment's original meaning, which only prohibits torturous methods of punishment, not disproportionate but otherwise lawful sentences. He would have upheld the states' sentencing schemes entirely.
Dissent — Justice Alito
Justice Alito argued the Court's evolving-standards-of-decency approach has become untethered from any objective evidence of societal consensus, noting that many 17-year-old murderers are nearly indistinguishable from adults. He warned that the decision would likely be extended soon to bar discretionary life-without-parole sentences for juveniles too.
How the Court got there
The legal reasoning, step by step
- The Court combined two lines of precedent: cases barring certain punishments entirely for whole categories of offenders based on reduced culpability, and cases requiring individualized consideration before imposing a death sentence.
- Drawing on Roper v. Simmons (barring the death penalty for juveniles) and Graham v. Florida (barring life without parole for juveniles who did not commit homicide), the Court reasoned that children are categorically less culpable than adults because of immaturity, vulnerability to outside pressure, and a still-developing character.
- The Court reasoned that because Graham had already likened life-without-parole sentences for juveniles to the death penalty, the individualized-sentencing requirement long applied in capital cases became relevant to juvenile life-without-parole sentences too.
- Applying that combined reasoning, the Court concluded that a mandatory sentencing scheme, which gives a judge or jury no ability to weigh a juvenile's age, background, or the circumstances of the crime, poses too great a risk of disproportionate punishment.
- The Court rejected the states' argument that Harmelin v. Michigan barred this result, explaining that Harmelin never addressed juvenile offenders and that many sentencing rules permissible for adults are not permissible for children.
- The Court also rejected the argument that the number of jurisdictions imposing mandatory life without parole showed no national consensus against the practice, reasoning that many of those laws resulted from the accidental interaction of separate transfer and sentencing statutes rather than deliberate legislative choice.
Doctrinal impact
Cases affected by this decision
Reaffirms Graham v. Florida (560 U. S. ___)
The Court relied on and extended Graham's reasoning that youth diminishes culpability to homicide cases.
Reaffirms Roper v. Simmons (543 U. S. 551)
The Court relied on Roper's holding that children are less culpable to support barring mandatory juvenile life sentences.
Distinguishes Harmelin v. Michigan (501 U. S. 957)
The Court said Harmelin's refusal to require individualized sentencing for adults does not apply to juveniles.
Reaffirms Woodson v. North Carolina (428 U. S. 280)
The Court relied on Woodson's rule against mandatory death sentences to support requiring individualized juvenile sentencing.