I think that maybe residential treatment may be best then. He is involved in criminal activity and regardless of his diagnosis, which can never be verified for sure, he needs serious behavioral treatment and protection from himself. In the meantime, a residential facility will do it's best to help diagnose and treat whatever is going on. I'm not an expert, but have been in the mental health system since 23 and I know that the treatment that works best for each individual is more important than a diagnosis. This child is complicated and may get ten differing diagnoses and may have more than one thing going on. Right now if the criminal behavior doesn't stop, he is setting himself up for a bad future and he isn't yet 16.
I normally do not like to see a child in residential, but if the child is a danger to himself or others, then I can't see another way. I do think he fits Conduct Disorder which is serious. I hope its not that although I doubt if anyone can say for sure. Anything else along the way is more treatable. I grew up with a serious mood disorder that kicked in badly at 13. I was very depressed and could barely function, but that did not cause criminal behavior. However, the two can co exist.
This may be the safest way to get help for him.
Love and light!