You have no evidence that Sheila was shot by the Police, only that either the gun was moved or Sheila's hand was moved,you have no evidence that anyone entering the premises of White House Farm that morning heard a shot,it was DCI Taff Jones who as overall head of the investigation declared the crime to be four murders and a suicide and the lower ranks who were dissatisfied with that theory,there is no evidence that Sheila had gone berserk with a gun because no Police officer recollects talking exclusively to Ralph(Nevill) Bamber. There is no evidence of gun oil on Sheila's nightdress or evidence that she discharged a rifle 25 times,neither is there evidence of any physical exertion or sweat on her face from someone who had been in a fierce struggle with Nevill.
To counter this we have Jeremy's assertions to Julie that he must have a "mental problem" because he had no feelings at all towards the deceased,his assertion that Nevill put up a stronger struggle than expected as he fought for his life and in this fight a glove came off in the exchange.We have Julie telling us how Jeremy knew a way into the property avoiding the main thoroughfares through one of the downstairs windows,which he may well have left open before he left for the night on August 6.