Just be careful! In SOME jurisdictions, you can get in trouble for 'stealing' if you take back something that was stolen. Possession vs Ownership are 2 different things. For instance, the thief may have stolen something, sold it to someone who bought it in good-faith, and you take it back from that person, it's technically theft!
File a police report, go through the right channels. If you know its yours, call the police department non-emergency and explain the situation
File a police report, go through the right channels. If you know its yours, call the police department non-emergency and explain the situation