Oregon Revised Statutes Probate Law § 112.475

(1) If a slayer of a decedent and the decedent, or an abuser of a decedent and the decedent, owned property as tenants by the entirety or with a right of survivorship, upon the death of the decedent, there exist two undivided equal interests in the property. One share passes to and is vested in the heirs or devisees of the decedent, and the other share passes to and is vested in the slayer or abuser.

(2) If a slayer of a decedent, the decedent and one or more other persons owned property with a right of survivorship, or if an abuser of a decedent, the decedent and one or more other persons owned property with a right of survivorship, upon the death of the decedent, the interest of the slayer or abuser remains as an undivided interest in the slayer or abuser for the lifetime of the slayer or abuser and subject to that interest, the property passes to and is vested in the other surviving owner or owners.