Four police had already looked inside that cupboard. That is on record. The fact they never recovered what would be the foundation of the prosecution case despite seaching the cupboard is problemactic for a range of obvious reasons.
According to what Ron Cook told the COLP investigators in 1991, he said that the thread on the end of the anshuzt guns barrel was free of blood and that although it did cross his mind that there ought to have been some sort of an attachment of sorts that should fit there. However, he said, that nobody asked him to look for whatever had been or could have been attached there. He then told COLP that there came a time when he himself had looked in a cupboard under the stairs in the den, and that he did not see a silencer, and that if he had done that he would have taken it, for takings sake, not because he thought it might have been used in the shootings! It is apparent that Cook was not merely referring to the silencer which could fit on the end of the barrel, but also its metal end cap which screwed onto the guns barrel as well...
Everything points to the silencer, a silencer , not being present in the so called gun cupboard in the den, that one wasn't present in that gun cupboard that morning. The sound moderator which Stan Jones seized on that first morning was one that he took from the vicinity of the downstairs toilet where Anthony Pargeters bruno rifle and Parker Hale sound moderator was 'normally' kept...
The other piece that could fit on the end of the anshuzt guns barrel, was its metal end cap - in September 1985, David Boutflour handed this metal end cap to DC Oakey, it was contained inside the same ammunition box that he claimed he had found the sound moderator in on the 10th August 1985...
Neither item was present in the gun cupboard on the first morning of the tragedy, otherwise, as Ron Cook said to the COLP investigators, he would have taken them, for takings sake, because of the clean looking external thread on the end of the anshuzt rifles barrel...