That's why I believe the Twins where the first to die. No one would sleep through that, As for Shelia she was on monthly antipsychotic injections, I don't know when her last recorded Injection was. However she was on this drug for four years and the dosage recently halved so considering tolerance building up over four years plus the dose recently halved, Its not going to prevent her form waking up
She was only on Haldol for a few months. She was switched to Haldol upon her 1985 hospital release. She complained about it making her drowsy which is why it was reduced but 100MG is still a powerful dose and she was still exhibiting signs of it making her drowsy. Some of the signs of being over sedated was her speech patterns which people observed and another they observed was she had beeing going to bed early because she it made her drowsy. After her 100MG injection she still was going to bed early. The weekend before the murders she left Colin's party early because she was tired and the night of the murders she went to bed early because she was tired.
If the fear was that the noise was goign to be so great that people would wake up then the parents would be killed first because they posted the biggest threat.
There is no way the boys could have been killed first because if they had been then the number of shots fired in the master bedroom would have been less. On TV guns have limitless bullets but in real life they do not and the number of shots fired helps piece together what happened.
If the noise in the kitchen woke Sheila up she likely would have gone to the kitchen to see what was going on. There is no evidence she did that. Nor any evidence she went to check on the boys which woudl have been another likely thing for her to do.
There are plenty of documented cases of people not waking up when others in their house were murdered most often it is CHILDREN who don't wake up but it does happen with adults as well. The notion they could not have slept through the gunshots which were not loud because of the moderator plus no one was shot in a room adjacent to their room combined with the kitchen being far from their room is enough that no one can say they had to have woken up.
No less than ten shots were fired in rapid succession in the master bedroom at June and Nevill. There is no way that could have happened after 2 or more shots were used on a different victim. The gun had to have a full magazine in it at minimum for such these 10 shots to have been fired. That is the best indication of where the shooting commenced.
The gun had to be empty in order for things to then progress to the kitchen.
The gun was partially reloaded and 4 shots fired to kill Nevill. The magazine was fully reloaded with 8 of those 10 used on the boys and 2 on Sheila. That is how the gun was then empty. There is no way to know for sure if the boys died last or Sheila.