The best way for him to get help might be if he is prosecuted for doing the inpersonation & stealing.......a judge could force him to get the help he needs.

Obviously, not knowing more & just from what I read, it sounds like he is into drugs or gambling or something where he is in massive debt & has to pay someone off (blackmail).

It that's the case, he can't say anything or they kill him....so he kills himself to get out of the situation?????

Just a question?.....otherwise, maybe there is something wrong in his brain (tumor or any other possibilities).

Waiting for help isn't going to help & honestly, maybe if family knows rather than trying to protect them from him.....maybe they could offer some ideas for help rather than trying to hide the problem from them. You never really know where the right contact might come from to get him the help he really needs.

He definitely needs to be held responsible for his actions & not allowed to get away with any of it......if it is someone else who is after him for money.....a judge that is prosecuting him, might come up with the truth.

Of course, this is just an idea