Idaho police have developed a lead in their search for the elusive person or persons who brutally slaughtered four college students last month: a white Hyundai.

Police in the college town of Moscow are asking for the public's help finding the vehicle, saying its occupants may know something about the chilling murder, Fox Reported.

New lead in Idaho slaying

A suspect has so far eluded the police almost a month after the November 13 killings of four University of Idaho students, Madison Mogen, Kaylee Goncalves, Ethan Chapin and Xana Kernodle, at an off-campus house.

In one of the investigation's scarce updates Wednesday, police said they are looking for a white 2011-2013 Hyundai Elantra that was seen in the neighborhood on the night of the crime. The police do not have a license plate number, and they did not explain the significance of the lead.

"Investigators believe the occupant(s) of this vehicle may have critical information to share regarding this case," the police said.

Chilling murder

The victims were all killed in the early morning. Police believe they were likely surprised by the attacker while sleeping, and some had defensive stab wounds from what police have called a "targeted" attack.

No murder weapon has been found. Two roommates who were asleep on the first floor survived the attack, and there were no signs of forced entry.

Police began removing the victims' belongings from the house Wednesday to give some emotional relief -- one could hardly say closure -- to their families.

"It's time for us to get those things back that really mean something to those families and hopefully help with some of their healing," Moscow Police Department Chief James Fry said.

Case going cold?

The college town's small police department is working with the FBI and state police on what is believed to be a complex investigation.

Fears are mounting that the case will go cold, but police say are doing their best.

"This case is not going cold. We have tips coming in. We have investigators out every day interviewing people. We’re still reviewing evidence, we’re still looking at all aspects of this," Fry told Fox News. "I said early on that no stone will go unturned, and I mean that."

If the attack was targeted, as police believe, then it's possible the killer is hiding in plain sight in the small college town of 25,000.

The police have received thousands of tips, but so far, there have been no breakthroughs.