Bryan Kohberger wrote an essay on how to handle a crime scene investigation while studying at DeSales University, two years before the Idaho student murders.

Prosecutors revealed in a new court filing that Bryan Kohberger purchased a balaclava months before the murders of four University of Idaho students. The surviving roommate who saw the murder suspect leave the home that night sketched that man in a mask similar to a balaclava.

Prosecutors in Bryan Kohberger’s murder trial are seeking to use a college paper he wrote at Lehigh County’s DeSales University to show his knowledge of crime scenes, according to a