Someone broke my sons glasses at day camp

My son(15) goes to the day camp at the YMCA. I picked him up today and saw hr wasn't wearing his glasses. He had then in his hand broken. I asked what happened and he said to just go. I knew something was wrong. I asked who tf broke his glasses and he kept telling me to just go. But I got out the car and dragged him back into that building. I went up to one of the counselors and said "One of these motherfuckers broke my sons glasses and I want to know who. He asked my son who broke his glasses. At first he said nothing but I told him to say it and he said very quietly "Trent". The counselor called Trent over and asked if he broke my sons glasses and he said no and I called him a liar and said my son isn't gonna lie. That fucker rolled his eyes at me. That counselor saif he will talk to his mom and I heard the kid mumble "Snitch". I was going off the handle and said "If my sons a snitch than youre a fucking bully". I also told them to give me trents moms number because I'm sending the bill for new classes. I also said "Anybody who wants to fuck with my baby will go through me." In the car I tried to tell my son not to let those things get to him, but he starts yelling at ME for saying anything and said I just made everything so much worse than it already is and I ruined his sophomore year before it even started. I told him I'm gonna defend him but his voice just cracked and said everyone already hates him and all I did was make it worse. Then he tried to walk hone but I followed behind with my car. I think he's just mad at Trent and taking it out on me, but it seems stuff has been going on for a while and not just at camp but at school.