I don't want to defend him, what he did was *wrong*. He should absolutely face consequences for gross over-reaction. I never said his response was reasonable given the circumstances.
But the way the story was presented was extremely biased. I believe the US cops are trained to actually use the "pit" maneuver to stop offenders who otherwise refuse to stop. In this case, he should've known better - but one can totally see how an asshole cop would interpret the situation as "lady is refusing to stop, I need to compel her to do so".
I guess what I'm saying is that it wasn't a totally random act of unprovoked cop violence.
I think that it doesn't matter whether it was 'provoked' or not: the police should be professionals who prioritize public safety above all else, and this is a total failure.
Remind us how physical injury is a reasonable response to a traffic violation.