OP, I would get your daughter to build a case against the guy buy going to all of her friends who know of his racist statements and come up with a detailed list of the statements that he’s made. Then I would go to the principal of the HS and show the list and demand that he be forced to apologize for what he’s said. It’s important to teach this guy a lesson, as if he’s offended your daughter, he’s hurt others. You’re actually doing him a favor by letting the axe fall now, rather than waiting until he’s in his 20s and out working, so think of this as trying to be helpful and actually kind towards him.