This is some funny fucked up shit. Gannon is a rookie, and Kilnapp is training him. They open the door to the bathroom and the perp (Borden) is sitting there holding a gun. Not pointing it at anything, just arms down holding it. Then:

Gannon “panicked” and “spun back out of the doorway, where he was no longer in the line of sight or fire between himself and Borden.” Gannon did not make any commands for Borden to get on the floor, proceed out of the bathroom, or drop his weapon, and Borden remained in the bathroom while Gannon retreated. During this time, Kilnapp was standing “near the top of the staircase.” “As [Gannon] ran, [he] pointed his gun over his head behind him—in the opposite direction he was running—and began shooting.” Gannon was purportedly “not looking where he was shooting.” After Gannon’s shots, Borden fired his gun..

So this rookie cop sees the gun and immediately turns heel and runs away while shooting behind him. Lol what?

And then the veteran cop gets charged with attempted murder.