According to the contents of the bullet weight for exhibit PV/20 written on the 'general examination record' at the Lab' for it (the fragmented bullet which was recovered from the left side of Sheila's neck) it weighed 1.5453 grams, yet by 20 September 1985, the ballistic expert was describing it as a WHOLE BULLET, which he was able to link conclusively, as having been fired via the anshulz rifle, it weighing 1.7145792 grams (23.8476234 grain which had gained weight in the interim period, growing to a huge 26.46 grain)...
In 1986, Jeremy's ballistic expert, Major Mead, visited the Lab' and took photographs of the 25 crime scene bullets, amongst which was the substituted PV/20 (whole bullet).
At this time, Mead recorded the weight of the substituted PV/20 bullet as being 1.7145792 grams...
Bullet PV/20 (fragmented) recovered from victims neck on 7 August 1985 - 1.5453 grams
Bullet PV/20 (whole) examined by ballistic expert on 20 September 1985 - 1.7145792grams
Bullet PV/20 increased in mass / weight by 0.17 grams, between 7 August 1985, and 20 September 1985, which also coincided with a change in description from being fragmented (on 7 August 1985) into a whole bullet (by 20 September 1985)...
Substitution of bullet PV/20 therefore took place at the Lab' and involved the ballistic expert, Malcolm Fletcher...
This bullet (PV/20) was substituted because of the fact that Sheila was shot for a second time after the police surgeon claimed Sheila was dead at 8:42am, and she got shot after Dr Craig had left the scene - believed to have been a police bullet, or from another gun which the police were using to try and reconstruct how Sheila had originally shot herself...
The introduction of bullet cases, DRH/1 and DRH/2, into the main bedroom scenario, was also designed to help create a false impression that Sheila had been shot twice in the bedroom before the police first entered it, when in truth, she was originally shot downstairs in the kitchen and she was not shot in the bedroom until after the police surgeon, Dr Craig, had confirmed her death at 8:42am, and left the scene...