Welcome and I too am sorry that you are having to go through this.
With that said, I do know that not pressing charges, not forcing the addict to pay the price for their behavior will lead to nothing but more bad behavior...stealing, more lies, and more serious addiction...these are not my rules, it is just what will happen.
You can not lead him around to make the bad things that he did right, this is his game, not yours. If he wants to redeem himself and seek recovery, this is something he must do for himself, if he found his way to the pawn shop, he can find his way back.
I have no advise...except "Hands off the addict"
Take care of you, are you going to meetings? If not, I would suggest that you do so, and, read "Codepentant No More", great book for us codies to read.