Wow...
Ok, main problem with litigation is it's very probable that the guy probably doesn't actually have much, that said you could probably sue for a judgment lien on his properties, but he's gonna have other creditors.
I'd suggest getting legal council immediately on this and getting the papers drawn up and filed ASAP.
Also, you're gonna wanna try to figure out how much he stole from everyone in total, if it's 5,000,000 or over you can get class action status. If not, best option is to sue through an organization that has liability to everyone who needs to be paid. Everyone suing individually wouldn't work unfortunately.
Studying for law school btw, let me know if I can help in any way.