(4)
directly or indirectly, corruptly demands, seeks, receives, accepts, or agrees to receive or accept anything of value personally or for any other person or entity in return for being influenced in testimony under oath or affirmation as a witness upon any such trial, hearing, or other proceeding, or in return for absenting himself therefrom;
shall be fined under this title or not more than three times the monetary equivalent of the thing of value, whichever is greater, or imprisoned for not more than fifteen years, or both, and may be disqualified from holding any office of honor, trust, or profit under the United States.