Would government agency help? I deal with older kids, but to be honest if what is happening continues, your kiddo, sounds like he will be my kiddo, but older. In PA in Allegheny county we have liaisons for each school diaristic for mental health. They can sometimes help families get connected to resources and it almost sounds like they need someone to help at home, which might translate to school or at least have someone "official" be able to share with school that there are issues that the family is seeing that don't happen in the summer or during breaks from school. I believe the family, but I hate to say it, parents get blamed a lot even when they are doing everything that they can do.
One other thought, I know everyone does not want to deal with lawyers. In Allegheny County we have a few education lawyers who meet with families for free and what they have told me is often times just a letter from them without any other action will allow for thing to happen. It does not need to be a mean letter, but a letter.
I am a special ed teacher, with a kid with a hearing loss, my district knows the place I work, and that I work with education lawyers and yet I often times have had to jump through hoops to get what my daughter has needed even when I have data to back my request. I hate to say the squeaky wheel gets oiled and the other wheels get ignored, but you might have to be squeaky.
