I had this very thing happen to me. I thought about taking him to court, but first of all, couldn't find him, and second of all, would not have been able to get money out of him, anyway, because he was always broke. (as con artists often are.)
The other factor was legal costs. If you have the money to spend, and he or she has the money, it might be worth it. But often it's not,. unfortunately. As far as criminal charges, it's very hard to prove. You could try, but very hard.