Well if Sheila's DNA not being in the silencer, was grounds for a release, the 2002 appeal would have released Bamber.
I don't know enough about DNA. If Neville and June's blood and DNA could get into the silencer from close range, but not contact shots, then that explains that. However I believe out of the 15 shots into them, at least one each could have been a contact shot.
Sheila certainly had a contact shot, which explains her blood being in the silencer. Maybe the DNA was in the blood evidence which was removed in 1996. Or maybe it's quite normal for someone's blood, but not their DNA to be found somewhere.
It was said several times that the dna evidence was not understood. The blood was no longer in the silencer it had been removed for testing years before. The dna did not come from the blood in the silencer.
