It's unclear why cops don't want the ID known, but they have gone back and forth about whether the community is safe, given that the killer/killers are still on the loose.
Police have said they don't believe the surviving roommates were involved in the stabbings. What's puzzling ... authorities believe the murders occurred sometime around 3 AM, but the 911 call wasn't made until noon -- 9 hours later.
Weirdly, the 911 call -- logged at 11:58 AM, November 13 -- requested assistance for an unconscious person ... yet police say it was a bloodbath inside, with blood seeping through the walls onto the exterior of the house.
A big clue seems to be a series of calls made shortly after the victims returned home ... one of them called a guy named Jack a total of 7 times while another tried 3 times, but police offered no further information.
Detectives are on the hunt for surveillance video from 3 AM to 6 AM Sunday, November 13. They're looking at nearby businesses and homes in the area.
It appears some of the victims put up a fight, given they had defensive wounds. Police believe the victims were asleep when the attack began. Police said early on this was a "targeted" attack.