Me? I was hit by a woman before, and I just took it. Plus, "initiation" is subject to discussion. This woman did not hit the officer, she resisted, that's true. And the officer lost his temper and reached a quick conclusion that if she is resisting he has right to hit her. Sorry, it's unacceptable by my standards.
The cop became physical first.
He grabed her, and she pushed him off. Thats what started it all.