re: Gun stolen.. What do I do?

At the minimum you need to so the serial numbers will be in NCIC and it will show its stolen if it ever gets ran. I'd contact each place you stopped and find out if they had cameras. If so you can always see if they can watch the tape and find out if that's where it was stolen from. If not contact the police dept there and let them know the situation and maybe they can go check the tape. Good luck