
Five justices, in an opinion by Justice Anthony M. Kennedy, agreed that the Eighth Amendment’s ban on cruel and unusual punishment forbids sentences of life without parole as a categorical matter for juvenile offenders who do not participate in homicides.
“A state need not guarantee the offender eventual release,” Justice Kennedy wrote, “but if it imposes the sentence of life, it must provide him or her with some realistic opportunity to obtain release before the end of that term.”
Chief Justice John G. Roberts Jr. endorsed only a case-by-case approach, but he voted with the majority in saying that the particular inmate in question had received a sentence so harsh that it violated the Constitution.
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