Y'know, I kinda hate to say it, but maybe the best thing you can do for him at this point is actually to get him thrown in prison. I know, it's prison and that sucks, but at least this way he has a roof over his head, food in his stomach and a warm bed to sleep in. Might even be able to get him the rehab he needs (and judging from what you're telling me, there's a good chance he'll wind up in rehab if he goes before a judge).
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"If you cling to something as the absolute truth and you are caught in it, when the truth comes in person to knock on your door you will refuse to let it in." ~ Siddhartha Gautama
"If you cling to something as the absolute truth and you are caught in it, when the truth comes in person to knock on your door you will refuse to let it in." ~ Siddhartha Gautama