On your 1st point, check my comment on another video:
The Curious Case of The Blood in the Bathroom; Solved? - News & Current Events / Public News & Current Events - Peak Prosperity
On your 2nd point:
Stand down order?
On your 3rd point:
True, the variation is bigger but I’m not enough of an expert in this specific area.
On your 4th point:
Not sure where he got that from and what exactly “a witness next to D Stewart” means. In one bodycam video, short after the shooting, was a guy runing towards a Cop telling him the Shooter is down.
Anyway, it would be the FBI’s fu**ing job to answer these questions!