I can't believe the surviving roommate didn't call 911 when she saw a masked man leaving the house after hearing what sounded like crying and a man (presumably not Ethan, as I'm assuming she would have recognized his voice) saying "it's ok, I'm going to help you." Perhaps she assumed it was some kind of late-night rendezvous and wanted to mind her own business, but it seemed like she was startled when she saw the man leaving, so I'm confused as to why she waited to call the police.
It's also curious that a security camera outside of the house picked up whimpering and a "thud" followed by a dog barking loudly, but yet the surviving roommate didn't hear the thud or the dog barking (at least it wasn't mentioned in the affidavit)?
I'm not blaming the surviving victim at all as we don't know the full story nor do we know what the dynamics were in the house regarding spur-of-the-moment guests, but I can't help but think that if she had called 911 when she saw the man leaving the house, perhaps some of the victims might have survived and BK could have been arrested much, much sooner. MOO.