Alive-And-Dreaming

I have been really good friends with this guy for about 2-3 years now. We have been through it all, thick and thin. But lately, he has started hanging out with a different croud. At first I didn't care, but they have become an extremely negative influence on his life. He has started commiting larcenous crimes and doing alot of "hard drugs", including smoking a pack a day of mentholated cigarettes.

It is important we break him away from these people before he starts doing caveman and shit like that. I don't think the people concerned about him could pull an intervention, because we are total 4/20 24/7 potheads and we do alot of other off topic mind expansion drugs. His mom is cool with us endulging in pot and occasionally fungi, but she find hard drugs to be disgusting. I don't want to rat him out because I'm not a narc, but I am genuinly concerned with his future. help me, please.