Murphy is a (floppy, friendly, lovable mop of a darling) dog. Dogs hear things.
Two things happened very close together, after the house had likely been very still for perhaps an hour or more -- a doordash vehicle arrived at the front of the house, with a person coming to the door, and a vehicle parked at the rear, with another person coming to a different door. Many a dog will perk up for that. Ears up. Some dogs a stance, some a low growl...
Sadly LE knows how K was found. Possibly she was found in such a way that it's virtually impossible she saw or heard or reacted to sounds.... but it also seems possible she heard Murphy and having heard Murphy had occasion to look out a window and saw one of the two persons approaching one of the two doors, told M, and climbed in bed next to her, not altogether worried.
It's like a -- sorry -- slasher film where the victims are unaware, the slasher is gaining on them, and the viewer is screaming at the TV --
Why on earth would K think they had minutes left to live, just because Murphy was on alert, if he was? One person approaching the house was perfectly harmless....
I think it's reasonable to consider that D did not have perfect recall of the sounds, words and order of events because that's asking A LOT of a young person who didn't know recall would be critical, who was roused from sleep, may have been less than fully awake. Given all that, IMO she did an extraordinary job recollecting what she did. I can't fathom the emotional load she was under, the shock and grief, plus the realization she interacted with a murderer -- I don't know how you EVER shake that terror.
I think it's quite telling that the murderer brutally killed four people in a span of about as many minutes and then WALKED out of the house. WALKED. No wonder none of it computed for D. Bizarre. Big leap from bizarre to bethejustdestroyedfourpeople.
I suspect BK approached the house in the same manner. Unhurried. Like he belonged there. Walked up, walked in.
Consider: X received and ate her food and then went to the kitchen, to drop off her debris, wash her hands and BK comes up behind her. Knife to neck. It's okay, I'm here to help you meaning, if you scream, you'll die as he walks her back to her room. Whimper, cry....thud.
Was he walking because that's how he operates, like an automaton? Was he trying not to drip blood?
Why, once in his car, did he switch speeds? Peeled rubber....did an image of D standing there take time to form and he realized he needed to vacate the vicinity fast? In the Wisconsin abduction I've referenced previously, the culprit murdered the victim's parents, kidnapped the young teen and drove away from the crime scene, nice and orderly, even pulling over to allow LE by, en route to the scene, the girl in his trunk. Unbelievably his vehicle never registered as a tip, the only vehicle within minutes of the crime scene within minutes of the 911 call originating from the same. Why did BK speed away? Does he feel buttressed in his car somehow, invisible, invincible? Whatever his intent, he made himself conspicuous.
I've seen some creative defenses -- from mountain lions to sweatered ninjas -- so maybe we'll hear about a psychotic break where he will claim a fugue state, coming to with blood om his hands, unaware. Heck, HE might even see himself as good.Bryan and bad Bryan, switching between helper and avenger, like some misguided avatar from a video universe.... and while some of that might explain why he did it, none of it will save him from conviction.
His digital trail is going to look like runway lights.
JMO