What I don't understand is why all those lies needed to be told. If the silencer which was sent to the lab on 30th August had blood on it, why did police need to pretend it was found in the gun cupboard?
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OK, blood found inside a silencer (DB/1) sent to the Lab' on 30th August 1985, belonged to the relatives, and by the time the blood came to be analyzed, Robert Boutflour had already managed to persuade ACC Peter Simpson, to start a fresh investigation, with a view to prosecuting Jeremy for the killings - in order to pursue such an objective, they had to find a way to make out a case for the blood having been found inside the Bamber silencer, which had not been seized or found by that stage...
Later, when the Bamber silencer was found in the gun cupboard, it was seen as an ideal opportunity to suggest that the blood had actually been found inside that silencer (DRB/1) and that the killer had used it on the gun at the time Sheila was shot and killed in the bedroom, and therefore the killer must have removed the Bamber silencer from the gun and taken it downstairs to hide it in the gun cupboard...
Police and relatives, simply moved the timing of when the Bamber silencer was found, from 11th September 1985, to 10th August 1985, and all the documentation at the lab', was altered to accommodate this approach...
This was how the Bamber silencer (DRB/1) which was found on 11th September 1985, was treated as having been the same silencer which was sent to the Lab' on 13th August 1985 (SBJ/1), and later when a silencer was resubmitted to the Lab' on 30th August 1985 (DB/1)...
They made out a false case for the Bamber silencer having been found sooner than it was, and for it to have been submitted to the Lab' sooner than it actually was...