Chick assaulted him first, so he acted in self defense. If it's ruled that way the she has no grounds to sue, and since she didn't provide said services, he should counter-sue to get his money back. His case is very well documented, and she will not be capable of changing that story no matter what lawyer she hires. You don't pay someone for sex and then beat their ass without getting what you paid for. Especially when you're a 44 year old geek, you don't thwart a hot young opportunity like that.
She's pretty fine for a hooker, but nowhere close to my ex.