Something I keep coming back to… If only 1 person (or 1 of the ‘pairs’) was targeted then I would think the killer would leave after committing the crime and not go out of his (assuming male) way to track the other 2 down unless the disturbance in one of the bedrooms brought the others out to investigate and he murdered them also as they were witnesses. However, if that were the case I would assume at least one of the attacks would’ve taken place outside the bedroom ie in a common area and therefore likely in plain view of the surviving housemates the following morning. Or, you could argue they ran back to their bedroom but that in itself would surely create enough of a commotion to be heard by the surviving roommates or even possibly neighbours.
If the surviving roommates did indeed witness a crime scene, I highly doubt they would be hanging in the house calling their friends over which makes me think both crime scenes were behind closed, locked doors. IF that’s the case, it leads me back to believing that for whatever reason the killer went out of his way to enter both bedrooms while sparing the surviving victims. This makes me think it was a stranger/random psychopath/SK something along those lines rather than someone known to them. I just can’t for the life of me make the actions (that we know of) of the surviving roommates that morning make sense unless the victims were behind locked doors. I can’t comprehend in what situation you would see a massacre of your close friends and hang in the house to call your other friends over for support and advice. There were 2 surviving roommates, even if they were hysterical, there was nothing stopping one of them calling 911 immediately and the other calling friends if they wanted the support unless they didn’t realise the seriousness of what was unfolding.
All my opinion and I mean no disrespect to the survivors and their actions, I simple mean to say that I don’t believe they saw the victims until LE arrived and opened the door.