Has he been evaluated by a psychiatrist or psychologist? Has anyone mentioned conduct disorder (due to being a minor)?
How was he originally diagnosed with autism (neurologist, psychiatrist, psychologist?).
Basically, the therapy isn't going to help until he is properly re evaluated and possibly medicated, to then re develope the correct therapy protocol.
I think the children's hospital is the right call. But focus #1 needs to be a proper diagnosis and treatment plan.
My wife is an MSW working on her clinician license. She knows this is beyond her skillset, but would 100% recommend what I'm saying (I asked her)