Well the OP's step son was caught growing canabis in his own room that he rented. Who did he hurt?
But again you can not expect him to change if he has antisocial disorder you can not make him have empathy is the part of the brain that governs it is broken beyond repair. So yeah kick him out. Counseling sessions are mostly a waste of time and money for such a disorder.
Probably the best they could teach them is how to fake empathy but its only if he gains something not genuine but hey I say its pretty good.
