I have yet to see the identities of the officers who did the training exercise inside the farmhouse, but as I say my bet is that it was the same officers who re-entered after Sheila was shot for the second time and they treated what they did as if it had been the first occasion they entered the farmhouse. If I am wrong, somebody will inform me of the identities of these other training officers, but I am led to believe that it was actually the same officers, and that two different versions of what took place existed...
Just to clarify...
An operation involving the discovery of two bodies downstairs, and three bodies upstairs, (where Sheila recovered and made it up to the bedroom and collapsed on the bed), hence why she was photographed there with only one wound on her neck, minus a rifle; followed by a second operation once Sheila received the second shot under the chin, where police re-entered the farmhouse at a time when there was only Ralph downstairs, and the other four bodies upstairs (including Sheila). By this stage, Sheila's body had been moved from the bed to the floor, hence why by this time she had blood running from the corners of her mouth and into her left eye socket?