I know how it feels....my brother got into the "wrong" crowd when he was only 14! Its been a constant battle...hes 21 now, and I know hes still not stopped. He has constant fits, and sometimse I feel it would be better if e just wasn't here. My parents are at each others throats 24/7 my mum cries all the time and its me who has to try to keep everyone calm, my younger sisters love him dearly I really don't give a **** anymore. He makes my mum cry my sisters upset and has thorn this family into two.
He stole ALOT! Its ironic but my mum got me pure gold braclets for my 16th b-day, I never use to wear them only occasionaly as they were too heavy, my mum usually keeps gold etc in a safe at home for some reason she didn't this time, and my brother went and sold them for some dope. He was into very heavy stuff at one point. He even got his faces slashed, the scars are gone now but it still hurts to know that some asshole did this to my brother and my brother actually let them for a few mins of getting high!
Hes ran away, been kicked out by my dad etc. Lived all around the country and yeah i'm pleased to say hes back at home and on track. Started uni and is slowly getting there. He still has his fits...which always end up with my mum crying and someone getting hurt, but hes getting better. Thats the main thing.
I know how you most be feeling, I felt so angry at him for so long and now I just petty him when he throws his fits there normal and i'm use to them. Personally I'd confront him...ask him upfront and se what he says.
Long post, and I apologise for this being anonymous.