In the video, between approximately 8:09 - 8:15 two flashes can be seen. Within two seconds of the second flash Finicum drives from the first stop. Victoria Sharp, who was a passenger in the truck driven by Livicum, said that after being shot at they began to realize that the police “meant business” and that Finicum yelled that he was going to continue driving so that he could “talk to the sheriff.”
(reference: https://www.youtube.com/watch?v=aAGxDWKrjPQ )
In the video, between approximately 8:09 - 8:15 two flashes can be seen. Within two seconds of the second flash Finicum drives from the first stop.
...
Those flashes are aperture changes in the camera.
And that was the first time the vehicle stopped. It wasn’t the first checkpoint where the other vehicle surrendered.