My son was in a fight in a detention room at school when the teacher who was supposed to be watching the kids in the room left for ten minutes to smoke a cigarette. The thing is my son and this other kid were in detention because they had been yelling at each other in class during the day. My son had also been bullied by this kid in the past and the teacher knew about this because it happened in her class. My question is whether I can sue the teacher under Massachusetts law. My son suffered injuries and required stitches and he was terribly embarrassed when the other kids in the detention room witnessed the beating and then mocked him. Thanks for your help.