Cal. Pen. Code § 4536.5
The medical director or person in charge of a state hospital or other public or private mental health facility to which a person has been committed under the provisions of Article 4 (commencing with Section 6600) of Chapter 2 of Part 2 of the Welfare and Institutions Code, shall promptly notify the Department of Corrections' Sexually Violent Predator Parole Coordinator, the chief of police of the city in which the hospital or facility is located, or the sheriff of the county if the hospital or facility is located in an unincorporated area, of the escape of the person, and shall request the assistance of the chief of police or sheriff in apprehending the person, and shall, within 48 hours of the escape of the person, orally notify the court that made the commitment, the prosecutor in the case, and the Department of Justice of the escape.
Ca. Pen. Code § 4536.5