The police have covered up the true circumstances of how Sheila died at the scene. They could not continue with the cover up once relatives introduced the evidence of the silencer. This was because police knew that the first shot inflicted across her neck when she was downstairs in the kitchen had been fired from a rifle belonging to them which was fitted with a sound moderator. The rifle they placed upon Sheila's body from the window was not fitted with a silencer. Police had possession of the actual silencer used in that shooting if Sheila in the kitchen, which was not ever fitted to the barrel of the anshuzt rifle during the shootings. So, once relatives started pushing for the evidence of the silencers in their possession to be part of the investigation, police had no option but to frame Jeremy for the murders in line with the thoughts and beliefs of relatives, which ended up with the wrong silencer being thrust to the forefront of the police investigation from there on, in..,
Police had every reason to cover up the circumstances of her death and how she had been shot by police using a police issue weapon fitted with a silencer, because they planted the wrong rifle on her body that did not have a silencer fitted to it's barrel, and the rifle police planted in Sheila's body, had inky fired one of the two bullets received by her. So, stop trying to pretend that police would not have any reason to cover up her death. Of course they had cause to want to fund some way out of the position they themselves had gotten themselves into - they shouldn't have put the wring unsilenced rifle on her body when stage managing her body to make out a false case that she had in fact taken her own life. But then again, the only other option open to them in the heat if the moment would have been to put both rifles in her body at the same time, but that was the only way the circumstances of her death could have been explained, which excluded suicide. So, there it is, spelt out in black and white, Sheila killed at the scene by use of two differently configured weapons, one with a silencer, one without a silencer. One if the two original bullets (PV/20) had to be replaced by a test fired .22 rifle to try and make it into a one gun crime. They could never have got away with putting either of the two guns used to shoot her on her body, because one of the guns used in her shooting inky fired one if the two shots inflicted. This is why they covered up the true circumstances of her death - police stage managed her body, got OC Bird to photograph it, and presented a false set if photographs contained in a mickey mouse photo' album claiming that this was how her body had been discovered upon entry. Police were caught up in quandery, two guns used to shoot and kill her in two different parts of the house, downstairs and upstairs. They couldn't stage her body upstairs with the rifle and silencer used to shoot her downstairs in the kitchen at a time when she only had been shot once, neither could they have stage managed her body downstairs in the kitchen once she had been shot and killed upstairs by the use of the second rifle when she had thus been shot twice, since she was only shot once whilst downstairs in the kitchen. They were caught between the devil and the deep blue sea, and whichever way they decided to go, their best chance it seems was to go along with the 4 murders and a suicide explanation, but all that changed once relatives started to like their noses into affairs, seeking to introduce the evidence of a different silencer..,