[chesterbr]

If you really allow me to be honest (and a bit harsh): you seem to believe to be entitled with life being a fair game. It isn't. Human nature is very diversified, and there will be those that won't give a damn to what you consider to be ethical behavior. I can understand that - it took me some time to find the balance between protecting myself against ill-intentioned people while not shutting everyone out.

You seem to worry on the long story with the fact that the "bad guy" is still on the loose. I'll be honest again: this seems like you're unconsciously trying to find justification to get even with him - after all, preventing other from "potentially fall in to his trap" sounds way better than, say, "get personal justice" - or (let's face it) "revenge".

Sorry for the hard tone, but I think mellowing the words will lead you to wasting time, money (and possibly reputation - let's remember how good this person is on that) on a rotten past which already taught you valuable lessons that seem to have helped on your career.

Instead, focus on your present and future. Life is short, and you certainly have people and endeavors that deserve your attention. Move on and have a great day!