Going by the evidence it is 100% certain that Neville and Sheila died between 3.26am (the time Jeremy said Neville phoned the police) and 3.48, which I believe is the time people arrived at WHF.
It is 99.9% certain that June, Nicolas and Daniel died during this time. Neville would not wait for Sheila to fire 16 bullets into them before ringing the police.
Could someone as frail and uncoordinated as Sheila have done everthing 22 minutes ?
In no particular order here are the main things she did -
The kitchen fight:
The 2002 appeal says -
42. ' The examination of Nevill Bamber's body also revealed black eyes and a broken nose, linear bruising to the cheeks, lacerations to the head, linear type bruising to the right forearm, bruising to the left wrist and forearm and three circular burn type marks to the back. The linear marks were consistent with Mr Bamber having been struck with a long blunt object, possibly a gun'
A professional boxer would be proud to have committed those sorts of injuries. And he has 36 minutes. Neville was not a professional boxer. But still put up a tremendous fight according to the judge.
Time estimate, 15 minutes.
Chamering and loading the rifle, at least twice:
Sheila may have loaded twice or five times. It gets progressively harder to load each bullet. Either way it is not easy for someone with 'limited' experience with guns.
Each re loading meant going to the kitchen, possibly from upstairs in a big house.
Time estimate, 5 minutes:
Firing 26 bullets:
This meant travelling to three different locations, both up and downstairs in a big house.
To get close enough, aim and accurately fire so many torso and head shots would not be quick.
Time estimate, 5 minutes:
Checking everyone is dead:
There is no point Sheila committing suicide unless her nearest and dearest are joining her.
Checking may have been done continuously. Or just once. Either way it is still travelling into different rooms and going up and down stairs in a big house.
Sheila of course heated the rifle and burned Neville's back.
Time estimate, 10 minutes:
Washing and changing (optional):
Many supporters claim Sheila did this.
Time estimate, 10 minutes.
Getting and reading the bible
The bible was found next to her. If she read the passage quoted, that was a long passage.
Time estimate, 10 minutes
Writing a suicide note (optional):
If you believe Sheila did this, it is at least another ten minutes.
Time estimate, 10 minutes.
Put the silencer away and shoot herself:
Time estimate, 10 minutes.
These are generous time estimations. Sheila was in a crazy rage and not organised at all, to do some of the above in an organized and efficient way. Someone so un coordinated may have taken hours to do all of the above.
Anyway, the generous total time it would take for Sheila to do all the things she was supposed to have done, is 55/75 minutes, (two things are optional). Which is 33/53 minutes over the 22 minutes she had.
If we go by the time Bamber said Neville called him, 3.10am, the 55/75 minutes is 17/37minutes over the 38 minutes Sheila had to get everything done.
Supporters are in a no win situation. They could go against Bamber and the OS and claim Neville did not phone the police, but that still leaves a 17/37 minute shortfall.