She shouldn't make any rash decisions. The first step would be to notify the school immediately particularly as it happened there. I assume they will have to report the matter to docs (or equivalent for your state). They will let you know how to handle it. She should be careful not to make a huge deal out of it until she receives some advice. She should just listen to and support her son. I wouldn't automatically jump and change schools as this can be traumatic for him also & may make him feel like he has been moved because he has done something wrong.