2013 ORS § 162.285¹
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. [1971 c.743 §203; 1979 c.231 §1]