I haven't really said this yet, but the very first images of the people taking pictures and viewing the scene from the top of the firetruck ladder made me wonder if there was some sort of staging that they wanted to photograph before they moved or disturbed anything. It would also help them to (possibly) see where any other missing evidence might be.
I don't know why, but I am reminded of the case at the University of Florida where the college students were dismembered and displayed. That case is very different in most ways, but it keeps popping into my head.
In that case, Danny Rolling had murdered before, but no one knew that until after he had been caught and tried for the UF murders.
Danny Rolling - Wikipedia, the free encyclopedia