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 pleaded guilty Wednesday in the stabbing murders of four University of Idaho students after reaching a plea agreement for the 2022 killings. The deal stipulates a life sentence.

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.