Most of the images are of very poor quality and questionable colour levels too.
However, I would say that the police bungling has left too much scope for speculation and uncertainty here.
Another aspect is Sheila's undigested stomach contents which were not analysed. If her last meal was at 9.30pm, she was dead by 2-3.am as it only takes 5 hours for the stomach to empty ( as I understand ) - Thus any Sheila scenario has to include her up having a snack in the small hours.
Are you referring to the images in the public domain? The pathologist for the defence did not complain about the quality.
As far as I can see the only speculation and uncertainty over Sheila dying later than the other victims emanates from supporters. No professional has ever claimed such and lawyers haven't challenged on Bamber's behalf.
Dr Vanezis deals with the contents of Sheila's stomach in Carol Ann Lee's book. He said it was the same for all victims but he just noted it for Sheila. Again all this was fact checked by Prof Knight for the defence at trial.
There's not a shred of evidence Sheila died significantly later than the other victims just a lot of nonsense from supporters.