Did she cooperate with the cops? Did the cops think she might be dangerous? Generally, people who have problems with cops refuse to cooperate. She could have had a firearm and shoot one of the officers. Furthermore, it’s likely that she wanted to sue the city so she refused to follow instructions.
She did everything the cop wanted.
If she was an actual threat, the cop would have died when he climbed in over her to unbuckle her seat belt.
And it is all recorded despite the cop not turning his body camera on. Of course his oral and written version of events differs significantly from video footage.