That is a possibility, it does happen.
It is the absurdity in Jeremy shooting her twice , then staging it as suicide that gets to me. Further, that he "hid" the silencer with blood and paint on it after something that must have made him extremely nervous and extra cautious. Then make a phonecall , which implicated him or Sheila, no possibility that anyone else had done it.
It all makes no sense whatsoever to me.
Your claims make no sense to me, the jury the courts or a majority of people so that leaves you in the minority.
You failed to address the rebuttal to your claim which is that if he just left the house they would have known for sure he did it because no burglar would stick around to kill everyone in their sleep they would at most kill those who caught them then flee not reload in the kitchen then go back upstairs to look for more victims to kill. It is your position that is absurd.
Your absurd position is that he would abandon his lengthy planning of framing his sister and just pray police would not suspect him though no one except him would prosper from the executions and also that Julie is lying, the lab, police and family all got together to lie and fake evidence in the most wide ranging conspiracy in UK history without any evidence of such a conspiracy surfacing so Jeremy can't prove it even though it happened.
Logically what is more likely Jeremy continuing with his plan to frame Sheila or the most wide ranging conspiracy in UK history?
Those who compared you to Spock were way off base... You are guided by emotion not logic.