At common law, the misdemeanor of observing a felony and failing to prevent it, or of knowing about a felony and failing to disclose the fact of its occurrence, or concealing the felony without any previous agreement with or subsequent assistance to the felon. "Misprision of felony" should be distinguished from the crime of being an accessory before- or after-the-fact, which requires some agreement with the party committing the felony. See 217 A. 2d 432, 433. The offense of misprision of felony has not been accorded general recognition in the United States. Perkins & Boyce Criminal Law 576 (3rd ed. 1982). Today, in order to be guilty of the federal crime of "misprision of felony," in addition to knowing about a felony and failing to disclose information about it, one must take an affirmative step to conceal the felony. See 38 F. 2d 515, 517; 18 U.S.C. §4. Compare accomplice; conspiracy.




