This whole situation seems like it was handled poorly.
Why did they let him walk back to vehicle.
Why did they all follow him back to vehicle.
Why did they not make him come back to them and make him get on the ground.
If they are letting him go back to vehicle keep your distance till you know what he is going to do.
Why did they have so many cops on scene like it was an extremely risky call.
This one will be very hard to justify.
What a mess.
Probably cause they do not have mind control. "Hey Mister disobeying orders come back here please".
How many wits do you possess? If you are going to criticize for Hoover Dam's sake come up with a critical reason mate.