Idaho Murders Update: Former Tenant Claims Victims Would Have Heard Killer Before Attack

Questions continue to surround the murder case of four University of Idaho students who were killed in bed at an off-campus house. This week, a former tenant claimed that entry into the home was detectable.

Cole Alteneder, a recent graduate of the University of Idaho in Moscow, lived at the home of the attacks during his junior year. He told ABC News that it was difficult to walk around the house without making noise.

"You can't walk up any of the stairs or on any of the floors without everybody in the house knowing it," Alteneder said.

A 911 call was placed from inside the home on Nov. 13, reporting an unconscious person. Police discovered the bodies of Kaylee Goncalves, 21; Madison Mogen, 21; Ethan Chapin, 20; and Xana Kernodle, 20.

The four college students each had multiple stab wounds, and some of the victims appeared to have defensive wounds.

At the time of the murders, six people were in the home. The victims were on the second and third floors of the house. Police believe the two other roommates, who were on the ground floor and survived, slept through the attacks.

Alteneder noted that the house and the neighborhood have a "very active party life."

"A lot of students are very familiar with the inside of the home," he said. "At parties, people would hop the fence and just, like, walk away if the cops came."

Police have received over 11,900 tips and more than 4,500 digital media submissions.

"Investigators believe someone has information that adds context to what occurred on the night of the murders and continue requesting additional pictures, video, and social media content," police said in a statement.

"Whether you believe it is significant or not, your information might be one of the puzzle pieces that help solve these murders."

The Moscow Police Department has not publicly identified any persons of interest or suspects.