If in fact that item is at a pawn shop and you have a way to prove that it is yours and you have filed a report to the police when it was stolen, then you can walk into the pawn shop grab the item off the shelf and tell the guy behind the counter to call the police right now because this is a stolen item and it belongs to you and you are taking it home. You then have to wait for the police to show up, then the people that work at the pawn shop have to give that information of who they took the item from and then once the police check the story and report and all identifiable information then you can go home with your item. You can then press charges on the person who took that item from you.
As most of you know I own a music store and have to know how to handle this since I do take in items on consignment.