Just a thought, but I think it had not really occurred to me before. If DG had gone to the home in darkness, and perhaps already knew the layout (after perhaps having walked around the house during the 'estate sale' earlier in the day?), he may have bee-lined directly to the bedrooms with the purpose of killing in mind, for 'revenge'.. and.. by whichever method he killed them by, perhaps just killed them... not necessarily even knowing at the time, who exactly he was killing at that moment in time?
From initial reports (which were made public months later - see below quotes and link
ETA I guess it was pretty much exactly one year later that the pub ban was not renewed on the affidavit info), it seemed to me that 2 of the victims may have been killed while sleeping in their separate beds/bedrooms. If DG had gone straight for the bedrooms, found one person in the master bedroom, killed that person, then found another person in another bedroom, killed that person.. is it conceivable that he may not have realized at the time that one of those people he killed was not one of his targets? (May have just been a head sticking out with the rest of the body/size hidden with bedding). And then.. from the description of that same initial affidavit, he may have run into a third victim as he came down the stairs, and killed that person too.
"
In a guest bedroom upstairs, Matthes
found blood on the head of the bed and neighbouring nightstand. When the officer walked down the hallway to the
master bedroom, he observed the same thing."
"The affidavit noted blood droplets in the main floor kitchen and at the foot of stairwell leading to the second floor. From there,
Matthes observed “a significant amount of blood” on the stairs and the wall next to them."
Is it possible that DG killed little NO in error? That could answer the question as to why he didn't spare little NO, and also why his charge was subsequently upped to first degree from second degree murder. Police may have charged him initially with 2nd degree, knowing that he had not 'planned' on killing NO... but because he had gone there with a plan to murder, it made no difference whether he happened to kill the right victim or not, the charge would still be first degree?
http://news.nationalpost.com/news/c...g-calgary-5-year-old-grandparents-likely-dead
The above link also notes that 2 dumbbells were found in the garage, one of which had blood on it.
“Inside the garage Cst. Matthes observed two dumbbells in front of the parked vehicle and noted that one of the dumbbells appeared to have blood on it.”