well i dont think you can say anything if his wife and kids left. you wouldnt be doing anything but either making him upset or just going in one ear and coming out the other.
herion is the choice for people that cant afford the pill habit. well at least in cali it is. but they are all readily available so i dont know. i would say to let him get evicted and then wash your hands with it because you never know what he will do when he is hard up for a fix. maybe hurt a u or your family. stay away from him he is a product of his own demise.