Read about that on some of the other boards. That really sucks. Our house was being "watched" last year-found evidence outside the snake room window consisting of a pile of cigarette butts and broken lawn ornaments (as well as stake-lights missing) and promptly acquired an alarm system a few days later. No problems so far.....
I figure it was probably someone who knew him-or someone he "mentioned" the snakes to. This is why if you own something expensive, you don't mention it to anyone. Just not worth the bragging rights anymore.