Norway massacre gunman Anders Behring Breivik 'not insane' The new conclusion comes just six days before the 33-year-old Norwegian goes on trial on terror charges for the bomb and shooting rampage on July 22 that killed 77 people. It conflicts with an earlier examination that diagnosed Breivik as psychotic and prompted prosecutors to say he should be committed to a mental institution instead of prison if convicted. Breivik has confessed to the attacks but denies criminal guilt. He claims the attacks were necessary in what he calls a civil war against Islam in Europe.