Hmm, and the records were erased past the 1st... bother. With no records, I would assume the only recourse is to check Bpt17's inventory or chests and see if any of these listed items are missing... it's a long shot, though. I doubt it would even really count as admissible evidence.
My best advice to you regarding this is just to chalk it up to experience. Yeah, it does suck to lose things, but you'll get them back pretty quickly, especially if it's just the few items you've listed here. Find a protected area or town and build there to prevent this kind of thing from happening in the future.
I'll have to leave it up to an admin to post here and decide whether it's even worth searching the guy's inventory.