ORS 162.285: Tampering with a witness.

(1) A person commits the crime of tampering with a witness if:

      (a) The person knowingly induces or attempts to induce a witness or a person the person believes may be called as a witness in any official proceeding to offer false testimony or unlawfully withhold any testimony; or

      (b) The person knowingly induces or attempts to induce a witness to be absent from any official proceeding to which the person has been legally summoned.

      (2) Tampering with a witness is a Class C felony.