Just a comment from a guy who went to high school when fights were common -
If this fight took place during class hours, AT the school, expulsion sounds right for the one who threw the first punch . . .
Bet you that the teacher/school never made the kids call the teacher MR/MISS/ MRS. Bet you that the teacher wasn`t wearing a tie/dress. Bet you that both boys were not involved in sports. Bet you that, thanks to the lawyers, most of the other kids will miss the lesson of this whole mess, being a white or black jerk is stupid.