that is what I have been thinking today. There could be tension/jealousy and maybe one of them had enough and snapped.
I think if it was something like that, the remorse would kick in and eventually the person would spill. Unless they're completely unhinged.
Today's tidbit from ISP, the victims were in the 2nd & 3rd floor bedrooms. If the door is on the 1st, that would suggest that the other 2 roommates were bypassed by the killer. I haven't seen a clear picture though, kind of looks like this place may have had entries on 2 levels. One of the victims' sister said that this was a party house, and they may not have been very restrictive with the door code, so that opens up a lot of possibilities again.
EDIT: and, even newer, Moscow PD does not believe either of the roommates was involved. Neither was the guy in the background of the food truck video. The victims were not tied up/gagged. "Some" had defensive wounds.
The pieces so far really seem to point to random lunatic more than to someone who was pissed at a victim.
And, Moscow is crawling with cops now:
Moscow Police Department:
• 4 Detectives
• 24 Patrol Officers
• 5 Support Staff
Federal Bureau of In Investigators:
• 22 investigators in Moscow
• 20 assigned agents located out of Treasure Valley, ID, Salt Lake City, Utah, and West Virginia
• 2 Behavior Analysis Unit
Idaho State Police:
• 20 investigators
• 15 troopers
• Public Information Officer
• ISP Forensics Services and mobile crime scene team
• 15 uniformed troopers to assist with community patrols