Take it from me. Ain't much ta improvise once ya killed somebody, pal. Unless ya hear somebody comin', ya get all the time in the world ta muck up a crime scene. An' we don't know when she died, either, so they mighta had all the time in the world ta mess around.

[ He has... experience. Oops. ]

There'd hafta be some kinda witness ta make the killer rush and fuck somethin' up. If they really did plan this, the evidence could be fuckin' staged fer all we know. It's, whatcha call it... inconclusive.