Wash. Rev. Code § 9A.40.040 : — WASHINGTON CRIMINAL CODEKIDNAPPING, UNLAWFUL IMPRISONMENT, CUSTODIAL INTERFERENCE, LURING, TRAFFICKING, AND COERCION OF INVOLUNTARY SERVITUDE — Unlawful imprisonment TEXT PDF (1) A person is guilty of unlawful imprisonment if he or she knowingly restrains another person. (2) Unlawful imprisonment is a class C felony. RCW 9A.40.040 Amended by 2011 c 336,§ 365, eff. 7/22/2011. 1975 1st ex.s. c 260 § 9A.40.040.