Ok... I'll bite...
So the police were busy staging Sheila's body for the suicide when the gun they were putting in place went off. She was alive when they were doing this, even though she had been certified dead, but the gun went off and she was finally dead.
And further evidence to support this is that the fatal bullet was of a different calibre to the first, so then they had to fake the reconstitution of the fragmented bullet etc.
So...
Why on Earth would the police be busy staging her suicide with a gun that wasn't the one used for the rest of the murders and the first of Sheila's wounds? It's not even self-consistent, let alone consistent with any of the other theories the pro- posters have used to support JBs innocence so far 
If two or more weapons were used by one party or another in these shootings, police could not very well stage manage Sheila`s suicide with or by use of both guns, they would have to decide on the spur of the moment, or with use of reasoned logic, which weapon they would be using in the re-arrangement of her body. Any discrepancies in the batch of crime scene bullets recovered from the scene, or from the bodies of victims, could be sorted out later, which is precisely what happened with bullet PV/20...
So multiple weapons were used to kill the other victims? I thought the only suspect bullet was the fragmented one found in Sheila?
There is evidence that as many as 14 original bullet cases were swapped over (MDF/100) to accommodate the prosecutions one gun crime theory. These original 14 bullet cases were replaced by 14 Ely control cartridge cases which were fired via the .22 Anshulz rifle during unofficial unreported test firings of the gun and control bullets once the nature of the investigation changed in September 1985. This substitution process enabled the ballistic expert to match the 25 bullets from the 25 wounds of the five victims, as all having been fired via the Anshulz rifle...
One of these 25 bullets, included the substitution of the original fragmented bullet PV/20...
There was absolutely no scientific evidence produced at all to link or match any of the 25 bullet cases, to any of the 25 bullets...
Linked to this matter, is the fact that some of the 12 whole crime scene bullets (7), were too heavy, and the other five were too light, for any of them to have been manufactured by Ely. When you consider that one of the 12 whole bullets turns out to be the substituted bullet PV/20, it leaves it open for the other 11 whole bullets, of which 7 were too heavy and the other 4 too light to have not been Eley Ammunition...
These discrepancies and inconsistencies indicate in the clearest possible terms, that Somebody has gone out of their way to make this into a one gun crime...