I feel horrible as my son kind of hinted that he wanted us to be with him when he turned himself in, and we didn't bite.
My wife and I, as one of our boundaries, agreed before this that if he got himself into trouble we would not assist him in anyway, and that included rides to Police stations, court etc. His choices brought him to this point so he can put on his adult pants, figure it out and deal with it.
Driving him to sporting events etc when he was in school was one thing but driving him to a police station and holding his hand so he can turn himself in is quite another.
It's still very hard.