https://www.law.cornell.edu/uscode/text/18/1512
(b)Whoever knowingly uses intimidation, threatens, or corruptly persuades another
person, or attempts to do so, or engages in
misleading conduct toward another
person, with intent to—
(1)
influence, delay, or prevent the testimony of any
person in an
official proceeding;
(2)cause or induce any
personto—
(A)
withhold testimony, or withhold a record, document, or other object, from an
official proceeding;
(B)
alter, destroy, mutilate, or conceal an object with intent to impair the object’s integrity or availability for use in an
official proceeding;
(C)
evade legal process summoning that
person to appear as a witness, or to produce a record, document, or other object, in an
official proceeding; or
(D)
be absent from an
official proceeding to which such
person has been summoned by legal process; or
(3)
hinder, delay, or prevent the communication to a
law enforcement officer or judge of the
United States of information relating to the commission or possible commission of a Federal
offense or a violation of conditions of probation
[1] supervised release,, parole, or release pending judicial proceedings;
shall be fined under this title or imprisoned not more than 20 years, or both.