So sad. He is suffering from PTSD ( Post traumatic stress disorder). He needs urgent psychological input. This issue will not go away without specialist input. Chances of success are higher not too long after the incident and at a younger age. All those teachers and headmaster should be locked up. If they did not know how to handle this situation why not escalate to the police immediately. Would they be so chilled about this very disturbing incident if it was their own child. Absolutely disgusting they all are. I hope karma gets them. Well done parents for not giving up and trying to help your baby boy despite little support from authorities. Keep going and baby boy will get the necessary support. Keep praying. You are not alone. We are also praying with you.