Someone stole my phone. What should I do?

I was selling my iphone 8 plus for $800 on the app called Offer Up. When I met the guy who wanted to buy it he just snatched the phone and threw counterfeit money at me. I filed a police report and the officer pretty much told me he couldn t do anything. I found the guys Facebook who stole my phone. What can I do? Can I sue him? I tried reporting it to the detective but they re not doing anything.

I don't believe you… Snatching the phone is theft however 'throwing counterfeit money at you' the police have even more reason to investigate and certainly would do…