Yeah, drive the guy wherever he wants to go and then turn him in to the cops. When you fail to turn him in, you are part of the crime.
I agree that would be the best course of action, but it’s not hard to imagine how he justified himself keeping quiet:
1. Hey, we might get away with it
2. It was only property damage
3. If he gets arrested, they’re gonna ask me to testify against him
4. He’s not gonna go to jail for life and he’ll definitely want to beat my ass when it’s over
5. Even if I turn myself in, I could easily get kicked off the team
So I agree with one of the above posters. If he was on board before the incident he deserves to be charged as an accomplice. If not, I’d probably just stick to the fleeing the scene/obstruction charge and leave it at that. Would not be surprised if he just pleaded guilty to that (maybe he has already?).