A knife sheath with DNA on it that was found at the apartment house where four University of Idaho students were stabbed to death in 2022 could have been planted by the actual killer, defense lawyers for suspect Bryan Kohberger may argue at his trial.

Prosecutors say Bryan Kohberger’s defense team will argue at his murder trial that someone else could have planted a knife sheath with Kohberger’s DNA at the home where four University of Idaho students were killed in 2022.