Wow, that is a sticky one.  Personally, I would let the law handle it and stay away from the whole thing.  The last thing you want is for this guy to come back and be able to sue you for slander or deformation of character.  Be careful and let them handle it.
Just my .02

If you are that sure, then do both the members of trade and this guy a favor and post his likeness on every forum you can!  He would be lucky to just get apprehended by law enforcement.  The alternative solutions to this kind of problem are often messy!
With the "Law" he could get a plea bargain, rehabilitated, free housing and meals and likely some time off for good behavior.  With the "Alternative" his options are more limited.........  Remember, the people he is hurting are your customers!

If you are not so sure then find a contact number and call him up.  Ask ask him point blank if he would mind being helpful to authorities by listing himself and his contact info on forums of this variety as a person who would be able to gather some direct information in the thefts of property as you describe.  When he says No, ask him if there is someone he can identify who might be better for the position.  If/when he does the whole "Not Me" thing, tell him thanks for his time.  Ask him to think some more about taking the position and tell him you will give him a call next week to inquire about his decision.  Make sure to keep calls like this coming to him either from yourself or by others whom have a vested interest.

I used this very method to retrieve property stolen from me when local law enforcement told me I would never see those things again.  Worked like a charm.

bad news rides a fast horse..    I believe that you throw his name around aws and you will find him. i have a friend who is in the sheriffs dept. here in enid, i will foward this to him..