18 U.S.C. § 1513: Retaliating against a witness, victim, or an informant

the attendance of a witness or party at an official proceeding, or any testimony given or any record, document, or other object produced by a witness in an official proceeding; or providing to a law enforcement officer any information relating to the commission or possible commission of a Federal offense or a violation of conditions of probation, supervised release, parole, or release pending judicial proceedings, in the case of a killing, the punishment provided in sections 1111 and 1112; and in the case of an attempt, imprisonment for not more than 30 years. the attendance of a witness or party at an official proceeding, or any testimony given or any record, document, or other object produced by a witness in an official proceeding; or any information relating to the commission or possible commission of a Federal offense or a violation of conditions of probation, supervised release, parole, or release pending judicial proceedings given by a person to a law enforcement officer; If the retaliation occurred because of attendance at or testimony in a criminal case, the maximum term of imprisonment which may be imposed for the offense under this section shall be the higher of that otherwise provided by law or the maximum term that could have been imposed for any offense charged in such case. There is extraterritorial Federal jurisdiction over an offense under this section. Whoever knowingly, with the intent to retaliate, takes any action harmful to any person, including interference with the lawful employment or livelihood of any person, for providing to a law enforcement officer any truthful information relating to the commission or possible commission of any Federal offense, shall be fined under this title or imprisoned not more than 10 years, or both. Whoever conspires to commit any offense under this section shall be subject to the same penalties as those prescribed for the offense the commission of which was the object of the conspiracy. A prosecution under this section may be brought in the district in which the official proceeding (whether pending, about to be instituted, or completed) was intended to be affected, or in which the conduct constituting the alleged offense occurred.