An ex post facto law is

Multiple Choice

• a state criminal law that conflicts with a federal criminal law and is overruled by the federal law.

• a criminal law that takes effect at some specified time in the future.

• a criminal law that is based on federal common law.

• a law that criminalizes an act that occurred before the law was enacted.

Mitigating circumstances

Multiple Choice

• if proved, may be applied to reduce a defendant's punishment.

• are the elements of a crime that must be proved at trial.

• if proved, may excuse a defendant from an alleged crime.

• refer to the procedures that must be followed during the investigation of a crime