Of course, the chief has major safety concerns ... the fatal stabbings of Madison Mogen, Kaylee Goncalves and Xana Kernodle inside their off-campus house have remained unsolved since November 13. Xana's boyfriend, Ethan Chapin, was also slain, but he didn't live at the location.
Investigators have not identified a suspect/suspects and no murder weapon has been found ... although it's believed a combat knife was used.
Detectives have also ruled out a number of people, including 2 surviving roommates who apparently slept through the attacks inside the home.
Despite the probe's slow progression, cops recently released a possible break in the case ... they want to interview the occupant(s) of a white 2011-2013 Hyundai Elantra, which was spotted near the murder scene that night.
The FBI, which is assisting in the investigation, has been inundated with tips, but the car has not been located yet. It's not clear if the occupant(s) are potential suspects or witnesses.