I believe it would be (a) in the public Interest, and (b) in the interest of justice, that there should be an in depth (tv) documentary about the sound moderator evidence in this prosecution!
There now exists a body of documentary evidence to confirm that the sound moderator evidence, with Sheila's blood and paint from the kitchen aga linked to it, can no longer be relied upon to sustain the credibility of these convictions. It has not helped matters by the strength with which the prosecutions case relied so heavily upon the presentation of this evidence, during the trial, and authenticated by the trial judge in his ghastly summing up, where he reminded the jury in forceful terms how Sheila Caffells blood had got forced back into the sound moderator at the time she had got shot and killed, and how with the sound moderator attached to the end of the guns barrel, the overall length of the weapon would have been much too long to enable her to have shot herself, even if she had wanted to..
How also, was it possible once she had shot herself hypothetically, had Sheila managed to unscrew the sound moderator from the end of the guns barrel (when she was dead), and take it all the way downstairs to conceal it inside a box hidden away in a cupboard in the downstairs office (den), and lo and behold, how Sheila had managed to return back upstairs, and lay down dead on the main bedroom floor, in possession of the now 'silencerless' rifle?
Well...
All of these factors fall by the wayside, if the sound moderator in question 'WAS NOT USED'...