The shot came from the reddish haired guy on the other side of the door. he had gun in his right hand and a baton in his left. One video shows him fire and the videographer immediately swung the camera and we see Ashli collapsing. I do not believe she died in the hospital, She died right there on the floor, shot in a neck artery, she bleed out in seconds.
I posted that image in reply to this:
https://freerepublic.com/focus/news/3922433/posts?page=14#14
dark suit, black mask, white shirt cuff