Ethan Chapin, Madison Mogen, Kaylee Goncalves and Xana Kernodle.

Ethan Chapin, Xana Kernodle, Madison Mogen, and Kaylee Goncalves

There are still more questions than answers in the Novemberstabbing deaths of four University of Idaho students— and those who knew the victims are still struggling to make sense of the brutal murders.

Madison Mogen, Kaylee Goncalves, Xana Kernodle and Ethan Chapin were all stabbed to death in an off-campus rental home in Moscow, Idaho, on Nov. 13. A masked intruder entered the home and killed the four students with a fixed-blade knife, police say.

But two of the victims' roommates were unhurt during the rampage — and police say that they have been cleared as suspects. According to a police affidavit, one of the roommates said shesaw the suspectas he left the scene.

“They feel a lot of survivor’s guilt,” a friend who has spoken to one of the roommates tells PEOPLE. “Their friends are gone and they’re still here. It’s been really rough on them. They’re going to be dealing with this for the rest of their lives.”

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A friend toldNewsNationthat one of the surviving roommates first heard noises around 4 a.m. on the morning of the murders. According to the news network, the roommate allegedly opened her door and yelled “calm down, you’re being loud!” and “I’m trying to sleep!”

She then closed her door and locked it, the source tells NewsNation.

When she heard more loud noises, the roommate opened the door just in time to see the killer walking down the hall, the network reports.

More than a month later, authorities arrested Bryan Kohberger, a 28-year-old graduate student and teaching assistant at Washington State University. He was charged with four counts of murder and one count of felony burglary.

1122 King Road in Moscow, Idaho and Bryan Kohberger, the main suspect in the Idaho killings.David Ryder/Getty Images; Latah County Sheriff’s Office/UPI/Shutterstock

Police tape surrounds a home that is the site of a quadruple murder on January 3, 2023 in Moscow, Idaho; Bryan Christopher Kohberger

The arrest has not provided closure to the former roommates.

Kohberger has not yet entered a plea. His next hearing isn’t until June 26. His attorney has not returned PEOPLE’s messages for comment.

source: people.com