Mega Edition: Bryan Kohberger And The Knife Authorties Say He Used During The Murders (8/12/26)

Officials said Bryan Kohberger used a large fixed-blade knife to murder Madison Mogen, Kaylee Goncalves, Xana Kernodle and Ethan Chapin inside the King Road house on November 13, 2022. The most important clue pointing investigators toward the type of weapon was the tan leather knife sheath found on the bed beside Mogen. The sheath carried Ka-Bar and U.S. Marine Corps markings, leading investigators to believe the killer had used a military-style Ka-Bar knife or a similar fixed-blade weapon. Prosecutors later disclosed evidence indicating that Kohberger had purchased a Ka-Bar knife and sheath online months before the murders, strengthening their theory about the weapon used in the attack. The sheath also became one of the most important pieces of physical evidence in the case because investigators recovered male DNA from its button snap that was ultimately linked to Kohberger. Despite the extensive injuries suffered by all four victims and the evidence pointing toward a large knife, investigators never recovered the actual murder weapon.

Finding that knife became an important part of the investigation after the killings. Authorities searched Kohberger’s apartment in Washington, his office, his Hyundai Elantra and his family’s property in Pennsylvania, while investigators reconstructed his movements before and after the murders using surveillance footage, cellphone information and other evidence. According to the prosecution’s reconstruction, Kohberger left Moscow after the killings and drove an indirect route through rural areas before eventually returning to Pullman, creating numerous possible places where the knife could have been discarded or hidden. Investigators searched for evidence that might reveal where the weapon went, but no knife was ever publicly identified as the murder weapon. That left the sheath discovered at King Road as the strongest physical remnant of the weapon authorities believed had been carried into the house. By the conclusion of the case, prosecutors had built their theory around the Ka-Bar-style knife, Kohberger’s alleged purchase of such a weapon and the DNA recovered from the abandoned sheath, even though the knife itself remained missing.


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