Cops, and people at the Lab' at Huntingdon, only started tampering with the different exhibit references of the silencer (SJ/1, 22) that was sent to the lab' on 13th August 1985, and (DRB/1, 23) not sent to the lab' until 20th September 1985, in November 1985, by linking both of them as being reference to the same silencer, by claiming that exhibit DB/1 (23) which got sent to the lab' on 30th August 1985, was a silencer, in fact, one and the same silencer, which had initially been sent to the lab' on 13th August, and latterly, on 20th September, when all along exhibit DB/1 (23) had been the flake of dried blood that David Boutflour scraped off the outside of the first silencer (SJ/1, 22) that Cook had taken to the lab' on 13th August 1985..
Cook sent a handwritten note to Fletcher at the lab' in November requesting him to alter the exhibit reference to the silencer and lab' item, number...
That's when the police and lab' documents were interfered with, where exhibit references (a)SBJ/1, (b)SJ/1, (c)DB/1, and (d)DRB/1, all referred to a silencer, or a sound moderator, as being one and the same silencer, or one and the same sound moderator, and the existence of the Boutflour flake excluded altogether..
Yet, exhibits (a) and (b) were the same silencer, or sound moderator, and (c) was the flake of dried blood Boutflour scaped off (b) prior to Cook taking it to the lab' on 13th August 1985. Cops sent (c) to the lab' on 30th August 1985, based on them finding out that Boutflour had scraped (c) off the outside of (b), acting in a response to Glynis Howard's finding that when she examined (b) on 13th August 1985, there was insufficient blood present on the outside of (b) to obtain blood grouping results. Only sufficient blood to confirm that the blood was human..
Exhibit (d) was the second silencer, or sound moderator, handed over to DC Oakey by Ann Eaton on 11th September 1985, (d) was the same second silencer, or sound moderator that David Boutflour telephone Essex police about on that same date, (d) was the same silencer, or sound moderator, which DS Eastwood and DS Davison fingerprinted on 13th September 1985, and (d) the same silencer, or sound moderator, which was subsequently forwared, or sent to the Lab' for the very first time on 20th September 1985, and (d) which first got examined at the lab' on the 25th September 1985..
That's why exhibit DB/1 (23) or in other words (c) was sent or taken to the lab' on 30th August 1985 - it was a source of additional blood said to have been taken from the outside of (b) sufficient in quantity to enable blood grouping to be done upon, with (c) it..
The blood grouping tests on (c) were duly carried out after (c) was made into a solution, and separate tests carried out, on 12th, 13th, 18th and 19th September 1985, producing the key blood group results of A, EAP BA, AK1 and HP2-1, respectively..