Oregon Revised Statutes (O.R.S.)
Title 16. Crimes and Punishments
Chapter 161. General Provisions
161.235 Use of physical force in making an arrest or in preventing an escape.
Except as provided in ORS 161.239, a peace officer is justified in using physical force upon another person only when and to the extent that the peace officer reasonably believes it necessary:
(1) To make an arrest or to prevent the escape from custody of an arrested person unless the peace officer knows that the arrest is unlawful; or
(2) For self-defense or to defend a third person from what the peace officer reasonably believes to be the use or imminent use of physical force while making or attempting to make an arrest or while preventing or attempting to prevent an escape.