I hate a thief! My old grey haired Grand Mother always told me not to hate anyone, but I still hate a thief!
I don't know if you want to push the issue or not but I'd go back with 2 cameras. Put one in the same place and then hide the other one really well to take pics of the first one. See if you can get the slimeball on film! Then pay his worthless butt a visit if you recognize him.