KK, what a really tough position to be in. Hopefully, they'll see the sense of it in the end and make the right choice. Make sure you don't get too pushy with it though or you'll end up driving away from it just because you're irritating them with it.
Keep in mind too that some people, despite every well laid out thought and argument, will not see things the same way you do. If that's the case try to find out what their thoughts are and come at it that way. Did they move him into a facility in the hopes that it will extend things and he'll get better, if so maybe have the Dr talk to them. Do they not want to bring him home because of the burden on your mom? Show them how much other help will be available.
Just my $.02
You...the black sheep!? No way
