I’m really, really sorry to hear that about your child and I hope they get justice. My daughter wasn’t treated that badly, but she was severely bullied which eventually led to a couple of girls prank calling her and doxing her on Discord. What did the school do? Put her in a group “therapy” session with the school counselor and made them all apologize to her- my daughter because she dared to get pissed off about the whole thing. That wasn’t the final straw, but we’ve taken her out and put her in online school. It means I had to leave my job to become what the school calls a ‘learning coach’ (it’s a state school, not a private school, but they require a parent to keep the kid on track) but it was our last resort. She was starting to have feelings of self-harm. The bullying never let up and the school didn’t give a shit.
I wonder, thinking back, if I would have had any recourse to sue the school for them making my daughter apologize to her bullies. Oh well, too late now.