A sentence of life imprisonment without the possibility of parole may not be a mandatory sentence for juvenile offenders. Decided June 25, 2012 (argued March 19, 2012). Opinion of the Court: Elena Kagan → go there Dissenting: Roberts, Thomas, Alito. Applied: the Eighth Amendment → go there Topic: Other criminal sentences. Miller v. Alabama, 567 U.S. 460 (2012), was a United States Supreme Court case in which the Court held that mandatory sentences of life imprisonment without the possibility of parole are unconstitutional for juvenile offenders. The ruling applied even to those persons who had committed murder as a juvenile, extending beyond Graham v. Florida (2010), which had ruled juvenile life without parole sentences unconstitutional for crimes excluding murder. Wiki link