Unbelievable...

i was bullied when i was at school for a while and i know how hard it is to deal with, i couldn't handle it and the school did nothing despite my mums best efforts, i ended up not wanting to go back to school i was to scared to, so i stopped going i got anxious ,depressed and i was not myself i lost my life my friends and myself at such a young age..Mum put me in home schooling after i saw councilors etc untill i was ready to go back to school( a new school)
Anyway thats off topic

Why were the police even called? No DR can tell you why your child is being bullied , what the heck is that gonna solve by taking him there, it will tell you if he has a medical problem, not solve the problem at hand which is he is being picked on at school, he had enough of it and he snapped, yeah he did the wrong thing , but god how much can the poor kid take ..And the fact that they said it was your fault and your boys my god how dare they.

I would take this to the principle ,tell him/her exactly what has been going on with the bullying ,the school has a moral obligation to you and your child to do something about it.