So you're suggesting the traffic cones are marking other evidence and not the spent casings?
??
There was a cone at Unarmed’s red ball cap. It’s possible they used the cones for any evidence, not just casings. Dunno.
As for the casings, my Glock throws the casing about six feet to my right and about two feet back. It hits the pavement spinning, and bounces in random direction once it hits ground. It could be ten feet from the point the shot was fired by the time it stops moving. Or it could be two.