One thing I can’t figure out. Assuming that we have the two girls upstairs and the BF/GF pair on the entry floor. Unless they BF/GF woke up and confronted the killer, why were they involved?
Supposedly the entry floor was floor 2, not floor 1. The killer killed the people on floor 2 and 3, and went back out the same way - on floor 2.
“The killer killed the people on floor 2 and 3, and went back out the same way - on floor 2.”
Yes, my point is that we assume the BF/GF on floor 2 were killed last, and although we don’t have the facts we’re inferring that the BF or both of them confronted the killer.
Two things. If they both confronted, she’s screaming her head off. Not meaning to be crude, but if she her BF stabbed, she screamed. Also, there’s little chance the BF got up without her knowing. Possible he stumbled into the killer while going to the bathroom, but more likely he heard something and got up concerned. My point is that the GF almost certainly had to hear BF and killer struggle.
Now that I think about it, as unlikely as it was, the trip to the bathroom sounds more plausible. Otherwise, I wake up and say ‘did you hear that?’
Next to last point: The killer had to have worn disposable coveralls, booties, and perhaps even a mask. We see no bloody footprints, nothing. The killer HAD to be covered in blood. He did not change clothes outside - he had to change in the apartment.
And finally, they cops HAVE to have DNA evidence from multiple fingernails. Shouldn’t it be easy to rule out the close contacts? Why not after weeks?