I had similar experience with Police not paying attention to evidence after few of us getting scammed in MM one Xmas by some a-hole from Cambs. We tracked the scammer down, one of forumites even hand delivered negotiation letter to his dwellings, I later arranged for photographic material to be taken and eventually served police with perfect fraud case, practically gift wrapped with double copies, just for them to drag their feet for weeks and return with "he said he sent the goods, case is closed due to insufficient evidence, try small claims court" even though all undeniable evidence pointed to contrary. However, in the process of doing everything in their power to NOT get our money back Police forces in Cambs managed to misplace original evidence, including bank payment receipts so I had nothing to go to court with.
Eventually I had to rely on "karma" arranging resolution and with Cambs Police fully awake and on top of their duties
the scammer finally received custodial sentence for a different crime.
I hate to be THAT guy and suggest playing outside the rules, but as far as the "balance to the force" goes - the proverbial "bad law is no law at all" and "it is what you make it" applies - considering in this particular case we have a speaker of northern Pakistani dialect handling stolen goods, perhaps a quick chat with an immigration officer might have the right "karmic" effect? Surely breaking into homes and stealing is not what Moley should be doing with his new life in the west?