BREAKING: Idaho massacre suspect’s DNA found on knife sheath at murder scene: affidavit

The New York Post reports that Police Officer Brett Payne wrote in the affidavit that while investigating the bloody crime scene, "I later noticed what appeared to be a tan leather knife sheath laying on the bed next to Mogen’s right side." 21-year-old Madison Mogen, 21-year-old Kaylee Goncalves, 20-year-old Xana Kernodle, and her boyfriend 20-year-old Ethan Chapin were the four students found dead at the rented home on King Road in Moscow, Idaho.

Payne said that the sheath had the markings of "Ka-Bar" along with "the United States Marine Corps eagle globe and anchor insignia."

Latah County Coroner Cathy Mabbutt confirmed to CBS News in November that the victims were stabbed to death with "would have had to be a large knife." It was further revealed that Idaho police were on the hunt for a, Ka-Bar-style knife.

The affidavit stated that "The Idaho state lab later located a single source of male DNA (suspect Profile) left on the button snap of the knife sheath."

The affidavit released on Thursday also stated that authorities used cell phone data, surveillance footage, DNA evidence, and collaboration with FBI analysts to track down Kohberger, who was arrested on Friday for the murders of the students.

Affidavit of the Idaho mass murderer by Roberto Cruz on Scribd

Kohberger was a graduate student at Washington State University pursuing his Ph.D. in criminology and had graduated from Pennsylvania’s DeSales University in June of 2022 with a Master of Arts in Criminal Justice.

In mid-December, Bryan Kohberger's father joined his son for a cross-country drive from Idaho to their home in Albrightsville, Pennsylvania.