Criminal procedure deals with the set of rules governing the series of proceedings through which the government enforces substantive criminal law . Municipalities , states , and the federal government each have their own criminal codes , defining types of conduct that constitute crimes .

Dec 1, 2024 · The original Federal Rules of Criminal Procedure were adopted by order of the Supreme Court on Dec. 26, 1944, transmitted to Congress by the Attorney General on Jan. 3, 1945, and became effective on Mar. 21, 1946.