ex post facto law


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Related to ex post facto law: double jeopardy, writ of habeas corpus

ex post facto law

n.
A law that retroactively makes criminal an act that was not criminal at the time it was done. In the United States, the passage of such laws is forbidden by the Constitution.
References in classic literature ?
"No State shall enter into any treaty, alliance, or confederation; grant letters of marque and reprisal; coin money; emit bills of credit; make any thing but gold and silver a legal tender in payment of debts; pass any bill of attainder, ex post facto law, or law impairing the obligation of contracts; or grant any title of nobility."
Bills of attainder, ex post facto laws, and laws impairing the obligation of contracts, are contrary to the first principles of the social compact, and to every principle of sound legislation.
No Bill of Attainder or ex post facto Law shall be passed.
No State shall enter into any Treaty, Alliance, or Confederation; grant Letters of Marque and Reprisal; coin Money; emit Bills of Credit; make any Thing but gold and silver Coin a Tender in Payment of Debts; pass any Bill of Attainder, ex post facto Law, or Law impairing the Obligation of Contracts, or grant any Title of Nobility.
By a limited Constitution, I understand one which contains certain specified exceptions to the legislative authority; such, for instance, as that it shall pass no bills of attainder, no ex post facto laws, and the like.
The Bill of Rights states: "No ex post facto law or bill of attainder shall be enacted.
Neither is her defense of ex post facto law viable, because she was charged with a 'republication' that happened when the Cybercrime Law was already in effect.
Campbell contended that applying the revised sentencing statute to his case in effect increased the penalty for a crime beyond what the law provided when he acted, which under Missouri's ex post facto law is unconstitutional.
An ex post facto law, the classic example of an objectionably retrospective rule, can operate precisely because it is a rule for future conduct that depends on past events: under an ex post facto law, officials are directed to impose criminal punishment on the basis of past events.
Such a statute would not be an ex post facto law because it would not actually punish the conduct leading to the defendant's original conviction that occurred before the firearm statute's enactment.
The Constitution prohibits the federal and state governments from enacting ex post facto laws. (156) An ex post facto law is a criminal law that has a retroactive effect.
The Louisiana legislature is not only prohibited by the United States Constitution from passing any ex post facto law, but also by its own state constitution.