Abstract: A high security locking device is disclosed especially adapted for use as a vehicle anti-theft and passenger security system. In one embodiment, the device comprises a frame, a bolt and a motor driven bolt actuator. The bolt resists slim-jim tampering and may be instantly locked and unlocked by means of a suitable switch. In a second embodiment of the present invention, a high security locking device is disclosed which comprises a frame; a coaxial slide bolt, having an inner core and an outer sheath, slideably positioned within the frame; a cylinder assembly positioned within the frame; an outer sheath positioning means coupled to and operated by said cylinder assembly; and a motor driven bolt actuator. The outer sheath is extended and withdrawn by means of the outer sheath positioning means controlled by a keyed cylinder mounted upon the outer surface of a door and optionally by means of a latch located within the vehicle. The inner core is operated by means of a motor driven bolt actuator.