The video I saw was a taser. He threw he right after Scott started running to free up his hands for his gun. Then he went back to the same spot and picked up a taser. Then he threw that taser right next to Scotts body.
Regardless of whether it was a taser or a hat, what rational explanation could there be for moving evidence? A couple of posters on FR have suggested it was to secure the evidence. A laughable excuse under these circumstances.
If it was the hat, maybe it was a knee jerk thing due to shock. It would not materially change the facts. If it was the taser, it is hard to excuse that.
What if his report says he went back and retrieved the taser?