I wouldn't do the BBB. I would go straight to the police for theft. Does he have a website? A good post about what he did is the worst advertisement in the world. We once had a company that owed us $3000 for almost 2 years. I found out that it was a company that owned properties all over the US and had a habit of ripping off mom and pop businesses. I talked to district managers, his accountants (who started to refuse my daily calls), and secretaries. Through many channels, I was able to get his personal phone number and call him. He hung up on me. Then, I found a website where people rented properties, campsites, etc. from him and I posted a "nice" review about how he ripped people off. I got a check 2 days later.
That long story is just to say if you need me to chase him down for ya, I'd love to.