Mickey191 - It seems to me that there are two choices; 1) try to get the money back, or 2) write it off as a bad investment.
Choosing the latter, there are no additional choices.
Choosing the former, there are at least two choices; 1) legal means (sue) and 2) imaginative means.
Choosing the former, you have little additional choices except to follow defined legal procedures.
Choosing the latter, you can let become as kind or as vindictive as you wish. Example; If it were me, I'd take out an ad in his local newspaper telling what a cheat he's been and how he took advantage of you when you were in a very vulnerable position. Don't include your name, but use your initials so he knows who placed the ad. And include his picture. This way, even if you never see another dime, you'll have tons of satisfaction!