Bless your heart, a lot of bad going around there..will keep you all in my prayers..I really feel for you all .
As for your brother can you call the police or a mental health place and have him committed..If a person is a danger to them selfs or others ,here you can have them committed..My son has done drugs since he was very young and like you said messed up, but has never been violent, but i had him committed once to try to get him some help, Im sorry to say this , but i lied to get him in, said he was sucidal..that was the only think I could do..It helped for a while.. ..Your pawpaw can he get in home help and your nana also??
They come to my aunt in OK..ck out your local medicaid or what ever it is called to see about it. you will be in my prayers let us know how it is going..
My heart goes out to all of you..God is there for those that call upon him..