If you watch the LE bodycam video, you will hear some of the same dialogue that the 911 recording captured -- not what was said inside the Cadillac before it stopped, but what the LE surrounding the Cadillac said after it came to a stop -- you can match it to those same comments on the 911 recording, and from there you can determine at what point in the 911 recording the vehicle comes to a stop -- I think it's earlier than you think.
The bodycam video shows the one LE officer standing directly next to the Cadillac and then actually climbing or being lowered inside the Cadillac to retrieve VW's gun and then to remove her from the car -- I think through the sunroof thought I'm not 100% sure on that. Anyway he is clearly close enough for his voice, and some of the other LE right next to him, to be heard on the 911 recording.
If that LE says he heard a gunshot while he was giving the Cadillac occupants verbal instructions to put their hands out the window, that is clearly after the Cadillac has come to a stop, because he was only standing next to the car giving them instructions after it had stopped.
MOO