Wash. Rev. Code § 71.06.040
At a preliminary hearing upon the charge of sexual psychopathy, the court may require the testimony of two duly licensed physicians, physician assistants, or psychiatric *advanced registered nurse practitioners who have examined the defendant. If the court finds that there are reasonable grounds to believe the defendant is a sexual psychopath, the court shall order said defendant confined at the nearest state hospital for observation as to the existence of sexual psychopathy. Such observation shall be for a period of not to exceed ninety days. The defendant shall be detained in the county jail or other county facilities pending execution of such observation order by the department.
RCW 71.06.040
*Reviser's note: The term "advanced registered nurse practitioner" was changed to "advanced practice registered nurse" by 2024 c 239 s 1, effective June 30, 2027.