Just a few thoughts after processing the information released during the press conference yesterday, and the subsequent additional information released about the 911 call (
link to NYT, apologies that it is paywalled for some, but I find it to be the most useful MSM explanation of what is known so far).
It's sad enough to see the senseless loss of life of the four victims, but thinking about the two surviving roommates asleep in the house while 4 others were murdered makes me sick. I think it's very possible that this was a random attack with an unknown (to the victims) suspect: it seems the killer did not realize the 1st floor was occupied and moved quickly, cleanly, and methodically through the 2nd and 3rd floors. It's hard to say for certain at this point, but it sounds like a very clean crime scene considering the violence of the attacks.
I understand everyone's curiosity and speculation about the 911 calls and what exactly transpired when LE was called to the scene. I want to emphasize some general observations, though: one, it is 100% possible that the surviving roommates slept through the attack and did not wake to suspect anything strange until around the time the 911 call was placed; two, it makes sense to me to call a nearby friend or relative before calling 911. I am only a few years older than the victims, and if I imagine myself in a similar situation, I might call a friend first to help assess the situation, especially if it was not immediately clear to me that a murder had taken place. To reference current discussion about the possibility of locked doors: yes, it's possible the murderer locked the doors from the inside, BUT, it's also a violation to enter someone's room without their knowledge or consent in a living situation like this. If they knocked, called out, and received no response, they might have called a friend first to enter with them and then called 911. Unless there were button locks, and the killer moved between the inside / outside of the house, I find it hard to believe that doors were locked. Just MOO.