What is the name of the law that criminalizes an act that was innocent when it was committed?

Name: What is the name of the law that criminalizes an act that was innocent when it was committed?
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Question

What is the name of the law that criminalizes an act that was innocent when it was committed?​

Quizplus · Accepted Answer

The term "ex post facto" refers to something that has been done after the fact. An ex post facto law defines an act as a crime after it has already been committed, or alters the punishment for an act after it has already been committed. This is prohibited by the U.S. Constitution in Article I, Section 9.

What Is the Name of the Law That Criminalizes an Act