If Diagram - dig3 correct, then PC Collins and PC Delgado were at the corner of red/white, or White/red, before they commenced their approach to enter the door, and they would have gone past the main kitchen window to the door, and beyond to the scullery window (also known to the family as the back kitchen) and peered into that window, not the main window - hence, they would have seen the body of the female in the wrong room for it to be in the main kitchen where the body of Ralph Bamber to be mistakenly identified as that of Sheila's?