I still think the shot came from left to right , referencing the video outside the barricaded door. From inside the shot would have been right to left. The man at that post was Mr. Red, I call him, he has ginger hair and a baton in his left hand.
It was this guy IMHO who shot Ashli, or another man who took up that same post.
It was a cowardly thing to do. Uncalled for. Murder in cold blood.