Ex post facto (state): Supreme Court decisions

Every U.S. Supreme Court decision from the 1946 through 2025 Terms that the Supreme Court Database classifies under the issue “Ex post facto (state),” part of the Criminal Procedure area.

Legal provisions most often involved

All 10 decisions, newest first

• Marion Reynolds Stogner v. CaliforniaLaw held unconstitutional
  539 U.S. 607Decided June 26, 20035–4Stephen G. Breyer
• Connecticut Department of Public Safety v. John Doe
  538 U.S. 1Decided March 5, 20039–0William H. Rehnquist
• Delbert W. Smith and Bruce M. Botelho v. John Doe I
  538 U.S. 84Decided March 5, 20036–3Anthony M. Kennedy
• J. Wayne Garner v. Robert L. Jones
  529 U.S. 244Decided March 28, 20006–3Anthony M. Kennedy
• Kenneth Lynce v. Hamilton MathisLaw held unconstitutional
  519 U.S. 433Decided February 19, 19979–0John Paul Stevens
• California Department of Corrections v. Jose Ramon Morales
  514 U.S. 499Decided April 25, 19957–2Clarence Thomas
• Collins v. YoungbloodAltered precedent
  497 U.S. 37Decided June 21, 19909–0William H. Rehnquist
• Miller v. FloridaLaw held unconstitutional
  482 U.S. 423Decided June 9, 19879–0Sandra Day O'Connor
• Weaver v. GrahamLaw held unconstitutional
  450 U.S. 24Decided February 24, 19819–0Thurgood Marshall
• Dobbert v. Florida
  432 U.S. 282Decided June 17, 19776–3William H. Rehnquist

Source: Supreme Court Database, 2026 Release 01 (data file dated September 8, 2026). Imported into CaseTrail November 5, 2026. Coverage: decisions from the 1946 through 2025 Terms. Methodology · Report an error