Abstract: A theft-resistant container or keeper of the instant invention is suitable for use with a case having a hinged edge and an opening edge, the keeper comprising a frame, a locking mechanism, a cover member. The frame has a back panel, a top wall, a bottom wall, a side wall and an extended frame portion off the bottom wall, the side wall substantially covering the opening edge of the case when contained in the keeper. The locking mechanism is substantially housed in the extended frame portion, the locking mechanism having a locking tab, a locking member and a latch. The locking mechanism is movable between a locked position and a unlocked position where the locking tab is biased toward the locked position. Spring members may also be provided in the frame to adapt the frame to cases of varying sizes and dimensions. A releasor is provided to release the case from the theft-resistant container.