A police officer cannot open your car door without permission unless there's probable cause, a search warrant, or an immediate concern for public safety. The Fourth Amendment protects against unreasonable searches, requiring legal justification. It all went downhill from there and the level of violence initiated by the officers was unwarranted for a mere misdemeanor traffic violation.
She should have kept her cool and peacefully complied with the officer's request. But like many other such events, LEO's seem to have a habit of willfully escalating these encounters and use any means or excuse to claim the the defendant was resisting in order to make an arrest.
It would be good to see stats on shooting of officers. How many happened out of the blue without warning? Or how many happened with the perp mouthing off to the officer for no reason?
I’d wager if a perp starts spouting off at the officer, there’s a high probability of that person opening fire. Hence the cops are on high alert and get rougher to handle the possibility of it rapidly escalating to gunfire.