Sheila was on Haloperidol & in a non responsive state.
As confirmed by the last two alive witnesses to see/hear her alive - Bamber & the house keeper.
She was so sedated, that she fooled the firearm officers that she was dead, downstairs in the kitchen, where they left her body along with 'Neville Bambers', body!
Unfortunately, for 'those of you who obviously can't see the wood for the trees', the raid team cops, exited the kitchen to search the rest of the farmhouse for the other family members, of which there were another three! Cops checked every room downstairs after confirming that there were two bodies in the kitchen. Now, if 'Sheila' was so 'zonked out of her mind', funnily enough then how did she end thereafter in the main bedroom upstairs, and lay alongside her adopted mother ('June Bamber') on the top of the bed! In order for this to have happened, 'Sheila' must have obviously been 'compusmentus'! Allow me, to educate you, regarding how alert she was, after cops assumed that 'she had died', and was 'deaded' there in the kitchen!
A key element to establishing as close as possible, let me try to focus your attention on the doorway in the kitchen, behind which was an escape route consisting of a spiral staircase, which linked the kitchen downstairs to the landing upstairs, the upstairs doorway would have, and did eventually provide access to that upstairs landing, and of course, the main bedroom where she subsequently laid upon the bed, alongside her adoptive mother! How astounding, that in the crime scene photographs taken of the staged managed kitchen set up, that the latched doorway and the spiral staircase that afforded access up and down between the kitchen and the upstairs landing, that none of the 6 man raid team, mention anything about that latched doorway or the spiral stairway beyond? Nobody checked what was beyond that latched doorway in a corner of the kitchen downstairs! Instead, the cops searched all the other rooms of the farmhouse on ground level. One officer, went up the back stairs in an attempt to communicate 'Sheika', by calling out her name [Sheila Bamber] as he cautiously mounted each step of the back stairway!
The original 6 man raid team, did not search or look inside cupboard doors, or the doorway to the so, - called gun cupboard in the downstairs office ('den')! Neither did they look behind or beyond the latched door in one corner of the kitchen (at the time a man and a woman's body was confirmed as being present in the kitchen upon entry!
It was not until the raid team discovered the other three victims bodies upstairs [8.10am] when the firearm officers operation had been completed, and the entrance of senior officers into the farmhouse Via the same route taken by the firearm officers at the time of their initial entry into the farmhouse, when upon entering the kitchen those senior officers raised the alert that there was only one body present in the kitchen, and that was the body of a male victim! The female, had gone missing!!!
At that time, it is understood that 'Sheila' had concealed herself behind the latched door and rested somewhere upon the spiral staircase, until the opportunity arose for her to exit the door above (top landing) and she slipped into the main bedroom, and collapsed onto the bed, next to 'June Bamber'..
'June' had possession of a rifle, at this stage which she had rested next to her on top of the bed, there was also two bibles on the bed at the same time. When 'Sheila' arrived on the bed, she picked up one of the bibles, and before she lost consciousness, she searched for religeous scripture within the pages of one of the two bibles, and faded into unconsciousness, with the bible fallen and resting upon her chest!
She was not relocated, on the bed of her adoptive parents bed until 8.30am..