Yes.
The reference to the silencer (DRB/1) shown to DI Cook by COLP, as part of their enquiry, could not have been the very same silencer (SJ/1) that DS Jones handed to Cook on the 13th August 1985. All that can be said concerning why the exhibit reference which Cook gave to the silencer (SJ/1) at the Lab' on that day, eventually became retrospectively referred to as exhibit reference 'SBJ/1', was / is because Cook did not realise on the 13th August 1985, that DS Stanley Jones, had a middle Christian name, of 'Brian'...
The silencer found by David Boutflour at the scene on the 10th August 1985, was subsequently given the identifying mark of 'DB/1', which was sent for examination to the lab' for the very first time on the 30th August 1985. It was inside this silencer (DB/1) that blood group activity was found at the lab' on the 12th, 13th, 18th, and the 19th September 1985. This silencer could not have been either the silencer bearing the identifying mark of SJ/1 - SBJ/1, or DRB/1 because the silencer bearing the identifying mark DRB/1 was not found by David Boutflour until the 11th September 1985, which his sister Ann Eaton handed over to DC Oakey on the 11th September 1985. How could David Boutflour and Ann Eaton hand over a silencer to police on the 11th September 1985, if there was only ever the one silencer, and police had already sent it to the Lab' at Huntingdon on the 30th August 1985. This silencer (DRB/1) which was found by David Boutflour on the 11th September 1985, which Ann Eaton handed over to DC Oakey on the same day, did not get submitted to the Lab' at Huntingdon until the 20th September 1985. Between 11th and the 20th September 1985, DS Eastwood and DS Davison (HQ SOCO) fingerprinted 'DRB/1' at police headquarters. How could the other silencer 'DB/1' have been back with the police in Essex on the 13th September 1985, on it was being tested for blood group activity at the Lab' in Huntingdon from the exact same day, onwards? Furthermore, because Silencer 'DRB/1' did not get sent to the Lab' until thge 20th September 1985, it is emphatically impossible for that silencer to have been the one inside which blood group activity attributed as belonging to Sheila Caffell was found beforehand...
We therefore, have one silencer (DB/1) that was sent by police to the Lab' at Huntingdon on the 30th August 1985, which by the 12th, 13th, 18th and 19th September 1985, blood group activity was found, detected and analysed associated to it, at Huntingdon Lab' - Bear in mind, please that silencer DB/1 was not exhibited during the trial, but the other silencer (DRB/1) was...
Also bear in mind that relatives had possession of the silencer 'DRB/1' before the first photographs which show scratch marks on the red painted aga were taken (14th September 1985) despite no such scratch marks being present there a month earlier when crime scene photographs were taken in the kitchen by two teams of SOCO, one team from HQ, and a second team of SOCO from Witham police station..
It is almost certain that ingrained red paint was found to be present on the silencer (DRB/1) when on the 1st October 1985, it was eventually examined. But any blood group activity belonged to one of the other two silencers (DB/1).
The other two silencers (SBJ/1 or SJ/1 - and DB/1), were the two silencers which a police motorcycle rider collected from relatives and brought to the court on the first day of Jeremy Bambers trial...
Exhibit 9, the silencer (DRB/1) was a piece of fabricated evidence, which had blood group activity attributed to it when it was an impossibility to have had the identified blood from the other silencer (DB/1), on occasions prior to it (DRB/1) ever arriving at the Lab' where the tests had been completed earlier ...
How did two of the silencers (SJ/1 - SBJ/1 and DB/1) end up back in the possession of the relatives before the trial had even begun?
Also contemplate the following...
What happened to the missing grey coloured hair that was supposedly stuck onto the end of the silencer (DB/1) found by David Boutflour at the scene on the 10th August 1985? Also, the elongated scratch mark along the outer length of the silencers outer casing?