How come no GSR was found on jayland walker if he was shooting at cops in his car and why was it placed so perfectly if he was shooting at police?

THIS QUESTION IS SPECIFICALLY FOR THE PEOPLE WHO CLAIM JAYLAND WAS SHOOTING AT THE OFFICER IN HIS CAR.

BUT ANYONE ELSE CAN ANSWER TO

So basically my question to these people, while im open to hearing any evidence of any claims on this case as long as its backed up, is why was the pistol and the cartridge placed perfectly by eachother in the BACK seat? Jayland had no time to full around placing a gun in the back seat like that. The guy was driving in the car, running from police. His car would stop if he did that. You're expecting me to believe he stopped his car and had it running slowly and then placed a pistol and a cartidge right next toe achother exactly?

And how come no GSR was found on Jaylands body?
How come no GSR was found on jayland walker if he was shooting at cops in his car and why was it placed so perfectly if he was shooting at police?
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