The provisions of this subdivision are in addition to other civil remedies and do not limit merchants or other persons to elect to pursue other civil remedies, except that the provisions of Section 1714.1 of the Civil Code shall not apply herein.
A theater owner may detain a person for a reasonable time for the purpose of conducting an investigation in a reasonable manner whenever the theater owner has probable cause to believe the person to be detained is attempting to operate a video recording device within the premises of a motion picture theater without the authority of the owner of the theater.
A person employed by a library facility may detain a person for a reasonable time for the purpose of conducting an investigation in a reasonable manner whenever the person employed by a library facility has probable cause to believe the person to be detained is attempting to unlawfully remove or has unlawfully removed books or library materials from the premises of the library facility.
In any civil action brought by any person resulting from a detention or arrest by a theater owner or person employed by a library facility, it shall be a defense to that action that the theater owner or person employed by a library facility detaining or arresting that person had probable cause to believe that the person was attempting to operate a video recording device within the premises of a motion picture theater without the authority of the owner of the theater or had stolen or attempted to steal books or library materials and that the person employed by a library facility acted reasonably under all the circumstances.
"IN ORDER TO PREVENT THE THEFT OF BOOKS AND LIBRARY MATERIALS, STATE LAW AUTHORIZES THE DETENTION FOR A REASONABLE PERIOD OF ANY PERSON USING THESE FACILITIES SUSPECTED OF COMMITTING "LIBRARY THEFT" (PENAL CODE SECTION 490.5)."
Ca. Pen. Code § 490.5