Were there were other contact wounds on some of the other victims?
There was a possibility that there was a contact shot to June, and the shots to Nicholas were contact shots or close.
So would you not expect to find blood from Sheila, Nicholas and possibly June either in/on the barrel or in/on the moderator?
I have no idea. They did find June's DNA in the silencer, so that could have been from blood. They also found DNA from a male person.
I'm just saying that they couldn't tell at the time whose blood it was on the outside of the silencer. It could have been Nevill's if he was struck with the gun.
They didn't categorically say it was June's DNA (from memory) but it was about 1 in 3000 chance of it not being her (they had to match against her sister) which isn't ideal, since in theory her sister could have a 100% difference in genes, or even a 100% match, but on 'average' - 50% matching genes
... But they eliminated any lingering doubts that the DNA could have been Shiela's...
They did at first, but then one of them said her DNA was maybe found in the silencer after all when more tests were done. Bit confusing to be honest.
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No, Sheila's DNA was not found inside the silencer, on any baffle plate where any blood was / may have previously been seen / found. I strongly dispute such a suggestion, because that is not strictly true...
Lets get the facts right, so that there can be no mistake about this point - some DNA was found to be present upon the inverted thread, inside the silencer that screws onto the external thread of a guns barrel. How it got there has never official been discussed or explained, but it seems odds on, that it got there purely by accidental or innocent contamination - when the police were moving the guns barrel around upon Sheila's neck / throat, which was the very occasion that Sheila's DNA was put onto the end of the barrel of that gun...
You then have various police officers screwing the silencer onto the end of the guns barrel, (PC Whidon, and DI Cook) before the silencer was even sent to the Lab', on 30th August 1985, brought about because Sheila's DNA that was present on the external thread on the end of the guns barrel, was fitted internally to the silencer, by screwing the threads of both together in an airtight fashion, which forced Sheila's DNA by dynamic process, into the silencer where it was eventually found in and by 2002...
There is nothing difficult in trying to fathom out how Sheila's DNA got into the silencer, since it was not discovered there in that part of the silencer until 2002, long after the silencer was put at risk of contamination by the police, and the ballistics expert, Fletcher, and others...
in my opinion...