Lookout it was impossible for Sheila to fire 26 shots & re load twice, then not show any of the above 20 pieces of forensic proof she had done this.
She could only have been shot by someone else.
Nothing was impossible. It was a " domestic situation " brought on by years of having been controlled by a religious psychotic. Sheila had stood enough as she could stand and this had been her opportunity to commit murder.
Once JB had left for home that night,things would have got very heated and Sheila had known that if she was going to carry out the crime it would have to be before the workers began arriving early. I reckon that initially she knew what she was going to do and the more she thought about her life and miserable situation,the bigger the frenzy in which she was embroiled in.
It might be impossible for you to believe,but it certainly isn't for me.
The truth of the matter is that it's mainly men who carry out this type of murder as we read about at least two every week,though it's not rare for women to carry out murders in this way where knives/guns are readily available-------which they weren't at Sheila's flat.
It was a poor investigation from the start and although treated as a murder/suicide,it was still a murder and should have been treated as such------but it wasn't !