The rifle was found on SC's body sans silencer. JB claims the first he knew there was problem at the farm was when he received NB's phone call. As we know the silencer was found in the gun cupboard days later by relatives. However instead of looking at ways to repudiate the silencer and blood flake, JB's QC, Geoffrey Rivlin, chose to include it by suggesting SC used the silencer to murder her parents and sons and then removed it before taking her own life. He also suggested the blood flake represented an intimate mix of NB and June's blood caused by close range shots and/or the beating NB sustained.
By suggesting the flake was a mixture of June and Nevill's blood was an attempt to repudiate it. While quite weak the alternative was to just give up.
I reject the blood/silencer evidence as I don't believe a flake of blood measuring a 1/4" would survive the hot discharge gases, the cyanoacrylate fuming chamber and time spent at ambient temperature until it was identified on 12th Sep and tested by way of conventional serological analysis of blood.
Your belief is not founded in science though. You can't point to any experts who say the heat would prevent the blood tests from being successful you simply decided it on your own. The defense could only make the argument you present if experts were willing to testify to such but none were. It is an established fact that superglue fuming and the heat in moderators doesn't damage blood to the point it can't be successfully typed. That is why you can't find any experts who say it never can be type tested after super glue fuming or if found in a moderator.
The defense was operating under the rules of court while you are not and can argue anything you like.
You keep quantifying all of the blood on the outside of the rifle together as if it were all collected in 1 giant sample but is was not. They took small amounts from various stains to test if it was human and that expended such samples. That made each stain smaller. That left less of each stain to remove to try to use for type testing. The flake was a much larger volume of blood than any of the scrapings they got from the outside of the rifle.
You take the fiction that some of the scrapings were larger than the flake inside and that not being able to successfully type such means it would be impossible to have tested the flake successfully. This simply doesn't work.
You also take the general rule that the length of time to test items will be shortened if stored in high heat/humidity conditions and make the leap this means the heat of the moderator or superglue fuming would always prevent successful. You are free to believe anything you like by making leaps like such but it can't be used in court and is not even persuasive to others here.
You are not really being fair to the defense.
Even with respect to the Bible it would have been quackery for then to look at what page had the blood stains and try to make up some way to suggest it helped prove suicide. Some lawyers are desperate enough to do that
but I actually think more of them for not engaging in such BS. The blood on the Bible was presumed to be Sheila's, it was not only by her but sitting in a pool of her blood. If there were blood from another victim on the Bible they still could not think of a way it would help establish Jeremy's innocence nor can I. Unless you had Sheila's bloody fingerprints on it in Nevill's blood (which would support her having beat him and gotten his blood on her hands in the process) small amounts of blood of other victims would not matter. The police found no prints in blood to try testing.