If Sheila did it, why did Nevill call Jeremy and not 999
If Nevill called Jeremy, and said 'Sheila has gone beserk' or 'Sheila has gone crazy' then that would suggest she hadn't yet shot anybody, otherwise the most likely words would be 'She's shot your mother, or shot me'
If she hadn't yet shot Nevill, it doesn't stack up with the evidence.
If Sheila did it, how did the bible have a mirrored pattern on blood on the inside pages (as occurs when a page is closed whilst wet, to create a mirror pattern. The bible was open, suggesting blood had been spilled, the bible closed, then opened again?
If Sheila did it, why was there such little blood evidence on her? Do you believe the ritual cleansing?
If Sheila did it, why choose to commit suicide in her parents room, rather than alone or with the twins?
If Sheila had gone berserk, why no gunshots at random objects as you might expect from a person out of control? - instead the killings were quite deliberate and execution style. Surely 'gone beserk' would imply some shouting and disturbance.
Either she went crazy with a gun, yet miraculously landed almost every shot only at people, and at close range, OR she was executing them, and was disturbed - in which case, Nevill surely would have phoned 999 and said 'she's killed someone'
We have gone over this a thousand times.
1) Jeremy obviously did not realise how serious things were and
2) the Bambers liked to keep Sheila’s illness hush hush
Jeremy obviously thought ringing the local police might be more discreet