That's Misprision of a Felony right there. From 18USC4: 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.
Crank up the Grand Juries and let the Indictments flow.
WADR, don’t get your hopes up that ANYONE in the House or Senate will actually DO anything to see the perpetrators brought to justice.