That sucks! Hope you find out who it was and prosecute.
Back ~10 years ago, when I was making home brew trail cams, a guy came up with a pretty good idea. He made legit foil type labels for inside the cams with a fake serial #. The labels said to call this # to request an owners manual. When/if anyone stole the cam, it was a home brew so there were no instructions available on the net, the thief would call the # to request an owners manual, give their contact info, and whalla, you knew who it was! Might be worth a shot if you put any more out there.