N.Y. PEN. LAW § 215.00 : NY Code - Section 215.00: Bribing a witness

A  person is guilty of bribing a witness when he confers, or offers or
  agrees to confer, any benefit upon a witness or a  person  about  to  be
  called  as  a  witness  in any action or proceeding upon an agreement or
  understanding that (a) the testimony of such  witness  will  thereby  be
  influenced,  or  (b) such witness will absent himself from, or otherwise
  avoid or seek to avoid  appearing  or  testifying  at,  such  action  or
  proceeding.
    Bribing a witness is a class D felony.