Misprision of felony (18 U.S.C. Sec. 4) is a federal crime which occurs when a person has knowledge of the commission of a felony by another person and fails to notify a law enforcement officer or other person of authority. This offense is a misdemeanor and is punishable by up to three years in prison. There are five distinct types of misprision of felony: 1) Concealing knowledge of a felony: This occurs when a person has knowledge of the commission of a felony by another person and conceals this knowledge from authorities. 2) Aiding and abetting the commission of a felony: This occurs when a person assists another in the commission of a felony, such as providing financial or material support. 3) Participating in a conspiracy to commit a felony: This occurs when a person conspires with another to commit a felony. 4) Concealing evidence of a felony: This occurs when a person has knowledge of the commission of a felony and conceals evidence of the crime from the authorities. 5) Encouraging a person to commit a felony: This occurs when a person knowingly encourages another to commit a felony. Misprision of felony is a serious offense that carries serious penalties, including up to three years in prison. It is important to understand the different types of misprision of felony in order to avoid committing this offense.