Bamber has accused the relatives of expertly framing him with the silencer. Saying that straight after he lost his family, they decided to frame an innocent man and take away his liberty, reputation and entitlement. For ever.
This was a bad move by Bamber as upon closer inspection this was impossible for the relatives to do. But blaming the police was not a good move either. But someone had to have contaminated the silencer.
The relatives were already wealthy and had no criminal history. The relatives have of course denied this. Saying there was enough evidence without the silencer.
Another recent suggestion was the police, lead by supposed maverick Stan Jones, expertly contaminated the silencer. Before handing this into the lab technicians. There are lots of reasons why this is not plausible. And no proof it happened.
The final option was that the lab technicians themselves fabricated the silencer evidence. Is this plausible or another shot in the dark ?
The police would have to take the big risk of approaching the lab technicians and getting them to agree to commit a serious criminal act. One uncommitted technician could be a disaster for everyone else. Especially if he reported this to Taff or someone like Peter Simpson. Resulting in police and other lab technicians losing their jobs and being prosecuted.
The lab technicians may have the expertise to expertly contaminate the silencer. Creating the back spatter effect. However their job is to test, rather than fabricated evidence. So this is not guaranteed.
The lab technicians will need Sheila's blood. Don't tell me Stan Jones had a pint of it on his desk :D.
It has never been determined whether it is possible to create the back splatter effect without the use of a rifle and body. Sheila's body may need to be available together with a rifle. I understand her body was cremated.
Do other people believe it was also highly unlikely the lab technicians agreed to expertly contaminate the silencer ?