Two of the residents in the home when the others were murdered survived (as did Murphy). We don’t know whether the murderer(s) knew the other residents were there or not.
But suppose the murderer(s) DID know they were there. Why spare them? (And thank goodness they WERE spared.)
Possibilities I can imagine:
- the murderer(s) did not know the other two were there.
- something interrupted plans, so the murderer(s) stopped and left before accomplishing plans to kill all people in the home.
- the four students who were killed were targeted because the murderer(s) believed they knew something or participated in something or were a party to something the other two didn’t/weren’t (at least as far as the murderer(s) knew).
- the three females who were killed were targeted because the murderer(s) believed they knew something or participated in something or were a party to something the other two females didn’t/weren’t, and the male was a collateral murder because he was there and a potential threat and witness.
There are other possibilities.
But it occurs to me that the three females killed were close BEFORE college as they all came from the Coeur d’Alene/Post Falls area of northern Idaho. Having a longer standing friendship, they may have shared confidences, friendships and other relationships, and experiences the others didn’t (and the murderer might have been aware of or suspected that). Or, they may have represented something - wealth, social standing, status, success, sexually active attractive female - the murderer felt they deserved but were left out of. If that feeling preexisted these females move to college in Moscow, that may have factored into the murderer’s motive to kill all three of those females, but spare the other two.
Also, KG may have had an experience or interaction (or simply have been seen) while she was recently in the CdA area that resurrected this feeling in someone there, who then pursued KG to Moscow with intent to kill the entire group of three.
So, while looking at the victims‘ close and more distant social circles, LE is likely having to look not just in Moscow, but also in CdA - to any of these three females recent experiences there and back in time to when all three resided there to determine if someone from their past has some personal (and rational only to that someone) motive to kill them.