. . . . . . . . . . "orrections and Conditional Release Act, and a warden, deputy warden, instructor, keeper, jailer, guard and any other officer or permanent employee of a prison other than a penitentiary as defined in Part I of the Corrections and Conditional Release Act,(c) a police officer, police constable, bailiff, constable, or other person employed for the preservation and maintenance of the public peace or fo" .