you can bet your ass that if it was someone within the circle jerk, or one of your friends character that was stolen, you would help them.
Actually Johnny Nuclear (one of the devs) has a few characters/nicks stolen. So I surely wouldn't bet my ass.
i want my character back, and i know you can help me. and yet you cant be bother to do that. that is pretty sad that you would act this way.
1) You would have to prove you had this char this seesion.
2) You would have to prove you didn't give access to character to someone else (which is impossible to do because it would be just word of new owner against yours).
3) Characters are stored in non-plain-text files I am not sure if they really are encrypted or it's just some binary format, but it's not plain-text format anymore so even if you would be able to prove points 1 and 2 only thing that could be done without convincing new owner to voluntarily give it back is deleting the character entirely. (The character files are [to my knowledge] handled via engine, and engine devs have better things to do than to add backdoors into the system incase someone would forget their password.)
so we can't really help you