Again it points to nothing of the kind.
Again it does.
The guilter scenario is as follows.
Jeremy starts the massacre by fireing 11 shots into June and Neville upstairs. Not only have 11 shots been fired but June has survived and is walking with her vocal organs undamaged, she will be screaming. While June is upstairs in agony Jeremy and Neville are having a life and death fight in the kitchen.
Its is impossible for the Twins to sleep through this noise and even if for argument sake we assume they will sleep through it, Shelia would wake up and instinctively rush to the twins to see if they are OK thus waking them up. There are two aspects of the scenario that will trigger the twins to wake up. Thus making the scenario incompatible with the crime scene