Why Would a Security Guard Wear a Yellow Jacket Kill Someone?

"It was very confusing to me, but here I am watching a video of a person wearing a security guard jacket and doing some extremely suspicious things leading up to the murder," Aaron says. "I mean, one of the points of wearing a reflective vest is to be seen." The same evening that he started this murder investigation, we're getting logs from this security guard. Just a few minutes before the murder occurs, he checks into a restaurant around the corner from where the murder occurs,. It almost doesn't get better than that.