According to the Revised Code, a person is guilty of unlawful imprisonment in Washington if he or she "knowingly restrains another person. (1) A person is guilty of unlawful imprisonment if he or she knowingly restrains another person.(2) Unlawful imprisonment is a class C felony. If you are dealing with issues pertaining to kidnapping or false imprisonment, do not hesitate to contact a Spokane criminal defense lawyer from our firm. Unlawful imprisonment is considered a Class C felony. Under Washington law, RCW 9a. Wrongful imprisonment involves knowingly restraining another person. Because of its broad definition, even lawful interactions could bring a charge. Been the victim of a wrongful arrest in Washington and need to discuss your options moving forward? False arrest can be considered an intentional tort, which means it is a noncriminal civil violation that the person did on purpose.