Do you believe Bamber could not have moved Sheila into his chosen position?
Bamber thought he could after checking on her at supper.
Sheila was also very vacant when on the phone that evening. Giving one word answers.
Sheila was easy prey for Bamber.
That's a complex question in its own right. Clearly, he literally could have done because he could have just asked Sheila and she might have agreed, if she was in a mental state that disposed her to agree - especially if Jeremy was pointing a gun at her.
But can't you see the problems with that scenario? You rely on the claim that Sheila was found immaculate. How can this be? Wouldn't Sheila have resisted at some point? You will say she was sedated, but do you understand what the expression 'sedated' means in the medical and physio-pharmacological senses, or in reality? It does not necessarily mean that she would be unable to defend herself. You may say she would be confused and tired, but wouldn't that make it more difficult for Jeremy, not less? How is it that Sheila had no blood on her feet when she was walking through a bloodied crime scene?
I could put dozens of questions to you. We could go into a discussion about the Ismail and Vanezis evidence. I think Ismail's evidence is wrong but Vanezis' evidence was correct. The angles at which Sheila was shot seemed to indicate to me that the killer must be Jeremy, but on further reflection I realised that I had not taken into account the position Jeremy would need to be in to make the shots. It's not just where Sheila was but also where Jeremy was, and his posture and so on.
This isn't simple!