There is a short fall of 7/8 photographs which PC Bird took of Sheila's body in the bedfoom - linked to the disapearance of these 7/8 negatives, is the fact that a block of photographs, (25, 26, 27, 28, 29, 30, 31 and 32) have been moved to them being taken before 23, rather than afterwards...
PC Bird did take photo's of Sheila in the bedroom before 23, but those photographs have been removed and the corresponding negatives cut out of the strip, so that police could promote the idea that Sheila was shot twice already before photo 23 was taken, when she did not recieve the second shot under the chin until after 23...