What also seems apparent to me, is that during the 'informatives', and prior to Cook, Bird, Davidson and Hammersley taking control of the staged crime scene after 10am, is that certain items were removed from the main bedroom, and others added! Also, that the bedroom curtains were rehung back at the main bedroom window, and the anshuzt rifle brought from the box room window, and eventually placed with Sheila's body on the bedroom floor (via the main bedroom window, as shown in photo' no. 23)...
Then Cook, Bird, Davidson and Hammersley took control of the scene in its staged state (two and a half hours later), and presented the argument that they had recorded the crime scene in its undisturbed state!