In 1993, California enacted a new criminal statute of limitations governing sex-related child abuse crimes. The new statute permits prosecution for those crimes where 'the limitation period specified in [prior statutes of limitations] has expired'--provided that (1) a victim has reported an allegation of abuse to the police, (2) 'there is independent evidence that clearly and convincingly corroborates the victim's allegation,' and (3) the prosecution is begun within one year of the victim's report. 1 In 1998, a California grand jury indicted Marion Stogner (D) charging him with sex-related child abuse committed decades earlier--between 1955 and 1973. D moved for the complaint's dismissal; the Federal Constitution's Ex Post Facto Clause, Art. I, §10, cl. 1, forbids revival of a previously time-barred prosecution. The trial court agreed that such a revival is unconstitutional. The California Court of Appeal reversed, citing a recent, contrary decision by the California Supreme Court, People v. Frazer, 21 Cal. 4th 737, 982 P. 2d 180 (1999), cert. denied, 529 U. S. 1108 (2000). D then moved to dismiss his indictment, arguing that his prosecution is unconstitutional under both the Ex Post Facto Clause and the Due Process Clause, Amdt. 14, §1. The trial court denied D's motion, and the Court of Appeal upheld that denial. The Supreme Court granted certiorari.