Oregon Revised Statutes Probate Law § 112.505

(1) Property appointed by the will of the decedent to or for the benefit of a slayer of a decedent or an abuser of a decedent is distributed as if the slayer or abuser had predeceased the decedent.

(2) Property owned either presently or in remainder by a slayer of a decedent or an abuser of a decedent, subject to be divested by the exercise by the decedent of a power of revocation or a general power of appointment, passes to and is vested in the heirs or devisees of the decedent other than the slayer or abuser. Property so owned by the slayer or abuser, subject to be divested by the exercise by the decedent of a power of appointment to a particular person or persons or to a class of persons, passes to the person or persons or in equal shares to the members of the class of persons to the exclusion of the slayer or abuser.