Do you believe Bamber would not be able to move Sheila a few feet?
He had just shot & brutally beaten a 6.4 15 stone man.
Sheila was Haloperidol. So almost certainly sedated. Bamber had checked on her at supper.
You've changed your tune from:
Sheila was sedated
to:
Sheila was almost certainly sedated.
It's progress, I suppose, but the point is we don't know that Sheila was sedated.
Also - and maybe more importantly - sedation is a term of art, whereas most use the term non-technically. Being sedated does not mean Sheila can be eliminated as a suspect.