I feel no sympathy for anyone who gets punched in the face by a cop.  If you get punched in the face by a cop, you were resisting arrest, almost assuredly. And I have no sympathy for anyone who resists arrest, even if you don't feel you should be getting arrested.  The best way to deal with the police is to cooperate.  Why is this not obvious to people?  If you have nothing to hide then that will come out in the end.  If she had no warrant, what were they going to book her on?  They'd figure that out and let her go.  But instead she resists arrest and gets arrested for that, and punched to boot.  Which she deserved as far as I'm concerned. 