Insanity.

RCW 9A.12.010
in effect
Sign in to generate a plain English summaryAsk Belisarius Agent
To establish the defense of insanity, it must be shown that: (1) At the time of the commission of the offense, as a result of mental disease or defect, the mind of the actor was affected to such an extent that: (a) He or she was unable to perceive the nature and quality of the act with which he or she is charged; or (b) He or she was unable to tell right from wrong with reference to the particular act charged. (2) The defense of insanity must be established by a preponderance of the evidence. To establish the defense of insanity, it must be shown that: (1) At the time of the commission of the offense, as a result of mental disease or defect, the mind of the actor was affected to such an extent that: (a) He or she was unable to perceive the nature and quality of the act with which he or she is charged; or (b) He or she was unable to tell right from wrong with reference to the particular act charged. (2) The defense of insanity must be established by a preponderance of the evidence.
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=9A.12&full=trueFetched: 6/28/2026

Starting a business in Washington? Washington LLC guide: costs and requirements