I trust that in 1985, technology was advanced enough for scientists to determine between human and animal blood.
DNA was to become common later in the decade so surely it was easy enough to make this distinction in 1985. Experts at court were even able to state whose blood it was - Sheila's, with a remote possibilities of it being a mixture of Neville's & June's, which the 'Campaign for Freedom' team has disputed.
It was a new rifle, and doubtful anyone would be able to give a rabbit a contact shot. Jeremy said he went outside to shoot them without the silencer on, but they had all gone.
Regardless of whose blood it was, how did the silencer end up with gun shot human blood back splatter ?
Did someone give themselves a contact shot accidentally prior to the massacre, creating the blood splatter effect ? A bit careless and I thought the gun was too long to shoot yourself.
Or did Ann Eaton give Robert Boutflour a contact shot prior to giving the silencer to the police. Taking a huge and optimistic risk that someone else's blood will convict Jeremy. But then how did experts say the blood was Sheila's or Neville/June's ?
Perhaps Sheila shot everyone else with the silencer on. Then put it away in a box and underneath other boxes, dartboards and other guns. That would also mean she put the silencer on the rifle beforehand, as the rifle was left in the kitchen without it attached. The judge said this action 'would be hard to fathom'.
Jeremy also testified Sheila had 'limited' experience with guns. So she may not have been able to put the silencer on. Anyway wasn't she in too much of a 'crazy' rage to be fiddling around with silencers ? And where was Neville while Sheila was rummaging around the gun cupboard ?
Perhaps the police or lab technicians deliberately contaminated the silencer. There is no proof this happened, Jeremy has not claimed this, preferring to accuse the relatives.
Jeremy has always optimistically claimed it was not Sheila's blood in the silencer. But if it is human blood at all, and there is no proof of deliberate contamination, then surely the silencer was used on the massacre night. This again highlights Jeremy's guilt.