Damn man, I had something like this happen about a month ago. Heard a loud ass noise about 2:30 in the mornning, like my baby girl knocked her dresser over. Went to look nothing checked out back and in front nothing. Went back to bed. Woke up the next morning and went to the klitchen to open the blinds and BAM. Never thought to check the side yard. Nothing major, about $50 bucks and an hour to fix, but just enough to piss you off.
At least your guy left behind some kind of identification info.