No, he didn’t.
Her refusal to obey his lawful order is what escalated it.
He was within his rights to issue the order.
She was not within her rights to refuse his order.
That was the point of escalation, and she began the snowball effect with her refusal.
Now that we know there was a “significant amount of marijuana” in her system at the time of her death, (CBS) maybe we should walk back why he wanted her out of the car. Was he observing something (other than her aggression) in her demeanor that indicates to him she needed further evaluation? That she shouldn’t drive?
His passive aggressive routine escalated the situation. His petty order and smug attitude were a part of it.