matt needs to learn how to take care of himself! if that means jail, so be it. he has to get control of his own actions, and deal with the feelings constructively.
i got my start in AA. alcoholism is a very common trait in people with D.I.D. most therapists will not treat someone that is under the influence of alcohol or illegal drug. it wouldn't do much good, even if they did.
12 step programs are very good at getting someone headed in the right direction. you begin with a firm foundation of recovery, and then learn tools to help you deal with all of the other crap life throws at you. they also treat it as a family disease. i can guaranty you that i wouldn't have made it if i hadn't sobered up and sought help. matt won't either if he doesn't.
there is only so much you can do. you can't "make" him do something he doesn't want to do. but you can provide a way for him to help himself. he needs to stop seeing himself as a victim, and start being grateful for what he has now. he is a grown man, and needs to take responsibility for his own actions. if he doesn't he will keep himself a victim. i'm not saying it's easy, and it is hard to find anyone that "really" knows how to treat D.I.D. but don't let it stop you.
i keep telling myself (i think he would relate), what "they" did to us was horribly, horribly wrong, we are not responsible for that. i thank God every morning i am not like "them", nor do i ever want to be. today, i am responsible for what i do, or who i may hurt. most of all i refuse to let "them" take any more from me! i deserve a better life and i'll be damned, if i allow "them" to keep me from it! that would be tragic.
benny

ps. i am going to leave you a message if i can. you might be surprised.