I've seen so many posts questioning why the surviving roommates did or didn't do xyz, some implying that they may be suspects themselves. I was very unfortunate to witness a tragedy and have someone die in front of me - granted I was 12, but what I can tell you about that experience is that I instantly went into shock. I couldn't remember 911, it eluded me as I stood with the phone in hand. The only number I could recall (obviously this was before cellphones but again in shock, who can say they'd be able to properly operate one) was the number of our good friend down the street. The number that was beat into us as kids, the number that everyone knows, and I couldn't for the life of me remember what it was. I have and will kick myself for not recalling the number for the rest of my life, HOWEVER, I have to remind myself as I would remind the rest of us, that these girls were not behaving in a way we might consider to be 'normal' because they were facing a completely
abnormal situation. You have no idea how you might react if faced with something horrific - this is all of course assuming that they saw something. I know the Daily Mail isn't exactly considered to be the purest source of SM, but I read an article in the very beginning of this all that Ethan was found in the hallway, something that has resonated with me as we have heard that perhaps not ALL the victims were FOUND in their beds, just that they were all sleeping and stabbed in them. Some of the victims had defensive wounds, which would suggest that they were able to move/attempt to fight back, so I can see someone staggering out of their room attempting to get help and passing in the hallway:
"One of the victims – understood to be 20-year-old Ethan Chapin, of Conway, Washington – was discovered on the floor on the second level of the three-story home.". This would explain the surviving girls perhaps not calling 911 right away, they were terrified and in shock and unable to get help for their friends, who they likely did not know were tragically already beyond help.