WOW.....Major WOW, on the affidavit! One huge area that concerns me is.....
The whole D.M (roommate) story. Sounds odd to me.
D.M claims to have woken up at 4a.m to (what sounded like) K playing with Murphy.
Then "a short time later" heard (what sounded like) K say something like "Someone's here". Maybe she (K, or X) saw or heard a car pull up or saw headlights like someone turned into their driveway?
D.M. looked out her bedroom door (1st time), no one there, she closed it.
She then heard crying from X's room & male voice (I think it's safe to assume it was BK, as I believe Ethan to be already dead). She said the voice said (what sounded like) "it's OK, I'm going to help you". However, (IMO) I think it's more likely he said "I'm going to kill you [too]". D.M opened her door & looked out again (2nd time), saw no one so she closed her door again.
At 4:17a.m a security cam, approx 50 ft from X's bedrooms west wall picked up (distorted audio in what sounded like) voices OR a whimper, followed by a thud and a dog barking. That tells us the killer is on the 3rd floor.
D.M opened her door "a third time after she heard the crying and saw a man...... ". So did D.M continue hearing the crying (thinking it was X) or could the crying she heard that time been from K or M or did she only open her door twice? If she heard the same crying as before (which she already stated came from X's bedroom) right before the killer walked (not ran, mind you), this could mean that not everyone's death was immediate and that at least 1 person lay in agony (I shudder at that thought).
Additionally, the killer passed by D.M and left thru back sliding door. Didn't he have to climb stairs to get to that 2nd floor sliding glass door (assuming she was standing at or near her bedroom door, which was on the 1st floor)?? Or was she on the 2nd floor when he passed by her?? Wait, WTH is up with him passing her?? Why didn't he go after her too??
But even more important?? Why didn't she go check on her roommate after the killer left?? I'd do exactly that, to see why she was crying and if was okay. Hard to believe all she did, after seeing an unfamiliar guy dressed in all black, wearing a mask that went over his nose & mouth inside her home & coming from the direction of my crying roommates room, is go back to sleep. Even if I didn't go check on my roommate, my butt still would have been on the phone calling 911.
FTR, all of the above is of my opinion. I am not bashing or criticizing anyone's actions, I am just trying to understand. I do realize that police often do recall some details incorrectly, or omit some things when it comes to writing up a PR so it's possible that not everything 100% happened the way it’s stated. Nonetheless, poor D.M. My heart sure goes out to her. She's going to have to live with the memories of that night for the rest of her life. I just hope it doesn't take over her and she seeks help, if or when it’s needed.