Here's a problem I see and just can't understand at all. He is a known scammer and has ripped several people off. Yet, for some reason it seems like nobody does anything about it. Happens all the time. You have enough info on him, so why haven't you contacted the police? This guy flat-out stole from you and you have more than enough proof to support that. All you need to do is go to your local PD and file a complaint. They will then contact his local PD (or in my case, contact the individual directly).
Not saying 100% that you'll get anywhere, but when I was in your shoes, that's all it took for the guy who stole from me to come to his senses and pay-up what he stole from me. Amazing how one call from the police, explaining what is about to happen, will make someone do the right thing.
My only question is, what are you waiting for?