Washington Pattern Jury Instructions–Criminal (W.P.I.C.)
Part IV. Defenses Chapter 16. Justifiable Homicide
WA W.P.I.C. 16.05 Necessary—Definition
Necessary means that, under the circumstances as they reasonably appeared to the actor at the time, (1) no reasonably effective alternative to the use of force appeared to exist and (2) the amount of force used was reasonable to effect the lawful purpose intended.