Remember slopped roof - he rolled- dangerous you know.

Elves.

It slid sideways across the slope because physics be hard.

And where is the blood splatter?

"Throw rifle" always have a spare you toss near the body to prove they were armed

thats a good question because the shot he took was an instakill, the bullet looked to have entered his face exiting out of the back if his neck around the spine

I think they just killed a 'random' kid and threw him on the roof, bought the ladder they put him up there with using his card, and propped his corpse up as a decoy "shooter"

He may have used an Ar-15, the counter sniper did not.