Bryan Kohberger appeared expressionless as a judge asked if he murdered four Idaho college students in their off-campus home, answering “yes” to each name called out in the courtroom Wednesday.

Bryan Kohberger has admitted guilt in the slayings of four students at the University of Idaho. But the public still doesn't know what motivated Kohberger to commit the knife attacks and how he chose his victims in 2022.

Childhood friends of Bryan Kohberger, who pleaded guilty Wednesday to stabbing four University of Idaho students to death in November 2022, have tracked his murder case from afar and said they felt shocked the former Pennsylvania resident suddenly agreed to a plea deal to spare his life.