I thought the bedding was burned before any forensic analysis so I don't know how you can be sure about this.
Yes, the bed clothes, and sheets, were destroyed, burned on a bonfire on the 9th August 1985, but not before they were photographed, and samples taken from them! Similarly, a large swaith of bedroom carpet which was cut out was also burned, but not before the piece of carpet in question was photographed, and blood samples were taken from it!
The fact is, that there were no bloodstains on the left hand side of the bed, but June's blood on the right hand side of the bed. No blood on the pillow case on the left hand side of the bed, but June's blood on the right hand pillow..
If Neville Bamber got shot in the jaw, etc whilst he was laying horizontal in his bed, how come there was no Bloodstains on the pillow, or the bed clothes and bed sheet on his side of the bed? This aside, let's say Neville got shot only after he ejected himself from the bed whilst the shooter was busily shooting 5 bullets at June Bamber on the other side of the bed? Well, there would almost certainly have been some blood on the carpet in the main bedroom immediately afterwards in a trail leading all the way out of the bedroom, onto the landing and main stair carpet, on his way down to the kitchen, but alas not one speck of blood which was unique to him, anywhere at all in any of these locations...
The closest we get anything near to possibly being his blood, is on a piece of wallpaper from the wall of the stairs, which tested as 'O' type blood. The presence of this blood there does not prove that Neville had been shot inside the main bedroom up to four times already, since there are a number of different explanations for its presence there. One such explanation is that the blood got transferred there as a result of the shooter holding the muzzle of the rifle barrel in a contact position with one or other, or both of the child victims when shooting them, who both had 'O' type blood, and that the barrel end of the bloodstained rifle came into contact with the aforementioned wall paper! Another explanation might be that after killing off Neville downstairs in the kitchen that the shooter had Neville Bambers blood on their hand and that at some point afterwards, the shooter returned upstairs and brought their bloodstained hand into contact with the wall paper on the stairs! I could give more examples, but it's unnecessary because if Neville Bamber had been shot 4 times in the main bedroom his blood would have dropped and squirted and splashed all over the place, in the same way it spilled out all over the kitchen downstairs! Seems to me to be a clear case of June Bambers blood being confined to the main bedroom upstairs (except for a piece of bedroom carpet beneath where the body of Sheila Caffell ended up), and that Neville Bambers blood was confined to the kitchen downstairs! What this suggests to me is that June got shot and killed upstairs in the main bedroom, and that Neville Bamber got shot, attacked and killed downstairs in the kitchen..
The suggestion that Neville had been shot a total of 4 times whilst he was upstairs in the main bedroom appears to me to be nothing more than a piece of fanciful narrative, to try and suggest that Neville couldn't have spoken to Jeremy on the phone, or to the police on the phone at 3.26am, because he had been shot in the mouth and jaw and as such would have hardly been able to speak...
Hence, why cops had to add in 4 spent bullet cases at the behest of PI Miller into the main bedroom crime scene (DRH/1, DRH/2, DRH/3, and DRH/4)...
This information didn't come to light until after the 2002 appeal hearing...
Like so many other things!