18 U.S.C. § 4 : US Code - Section 4: Misprision of felony

Search 18 U.S.C. § 4 : US Code - Section 4: Misprision of felony

Whoever, having knowledge of the actual commission of a felony
cognizable by a court of the United States, conceals and does not
as soon as possible make known the same to some judge or other
person in civil or military authority under the United States,
shall be fined under this title or imprisoned not more than three
years, or both.