What we have here, is clear evidence that there were two different identical looking silencers, one (1) inside which was attributed blood belonging to Sheila, and the other (2) to which was attributed paint from the aga in the kitchen at whf...
Relatives did not find the silencer inside which was found Sheila's blood, so the prosecutions argument that Sheila had been shot and killed and that whoever killed her must have removed the silencer from the gun and taken it all the way downstairs to hide it in the gun cupboard was a false proposition, because clearly the relatives did not find two silencers in the gun cupboard, they claim to have only found one...
The silencer (SBJ/1/DB/1) inside which was found Sheila's blood must have been found by someone other than the relatives...
That somebody was DS 'Stan' Jones who took possession of a silencer SBJ/1 at the scene from a very early stage...