The arrogant twat, and arrogant parents, have nobody to blame but themselves. They were given multiple opportunities to walk it back and threw away every one of them. It's still possible the complainant will drop the charges, but since this beyotch has such a huge attitude, I'm hoping he stays with it.
That said, she isn't likely to get any significant executed sentence, probably something like 30 days suspended and a year's probation, hopefully with a substantial fine and some sort of restitution. Hope they don't give her community service (Unless it's picking up highway trash under law enforcement supervision, with all the DUI losers) because she'll just claim work for some filthy prog organization should count.
ETA - As a lawyer, all I can say is this is what happens when you don't read your damn' mail.