I obviously don't know who did it - no one but Jeremy knows that for sure.
I have a hard time seeing Sheila doing it - she COULD however, it is not impossible. She was young, Ralph was older, if he had already been shot, he wouldn't have been able to put up as much resistance than normally. She COULD have cleaned up.
I have as hard a time seeing Jeremy do it (alone at least). It is a daunting task to enter a house with two children and THREE adults with the intention of killing them all single handedly. I just cannot fathom how that would be possible at all.
If it was Sheila, she could have quickly shot the boys and only having two adults in the same room to deal with.
Something is missing in both scenarios - I don't think any of us are close to knowing what happened.
An interesting synopsis Abs. I am rather puzzled at your suggestion that you have a hard time believing that Bamber could have done it?. Abs, yes it was a daunting task, but I believe that Bamber had planned this for months if not years. he was committed to killing his family. Julie Mugford states that Bamber became almost obsessed with the idea. If you take this case and divide it piecemeal then it is easier and far more planned and executed that one may first imagine.
First and foremost was the timing; everyone in the family had to be at that farmhouse that night for his plan to succeed. Secondly, Bamber had the perfect foil - his sisters mental illness. Thirdly, Bamber had the means to kill them lying right there in the house - an Anschutz .22 and the additional benefit of having a silencer. This effectively meant that he could murder them one-by-one and without alerting the others. Fourthly, Bamber did not live at the farm. He could murder them in the dead of night and make good his escape, all without arousing suspicion, create an alibi and submit his cock n bull story about receiving the phone call from his father to make it perfectly clear he was not at the farmhouse.
I understand Abs that it is difficult to imagine that a son who had been given everything he ever wanted would be capable of such an evil, heinous act. But I believe we are dealing with a very cunning, devious and scheming psychopath. A psychopath such as Bamber would have no problem killing members of his own family if he though he would benefit by it. The act did not go smoothly as Bamber had hoped. His father had put up a fight and it obviously surprised Bamber just how many bullets it took to take down another human being - he had to reload at least twice. This was not part of the plan. He also had another shock upon discovering that the length of the rifle with the silencer fitted would mean that it was too long for Sheila to both place the gun under her chin and simultaneously reach the trigger. He had to unscrew the silencer, try to wipe it clean and place it back into the gun cupboard. A mistake that ultimately lead to him being unmasked.
Abs, Bamber would have had little problem carrying this out. His quarry were a 61 year old man, 2 slightly built women and 2 small children. Hardly a difficult job for a strapping, very fit 25 year old man in the prime of his life armed with a loaded rifle.
The murders would have taken no longer than 10-15 minutes to carry out and perhaps another 10 minutes to set the scene before he made good his escape on his mother's bicycle. This meant that Bamber was probably in and out of the house in less than half an hour.