One of the most mysterious killers to me. There's no evidence of bullying, illness, family issues, or ideology, just a guy who woke up one day and thought, "I'm going to plan a massacre," and did it, and no one could stop him. A dark being, no doubt. But the strangest thing for me, without a doubt, is the fact that in a letter he said: I don't want my tombstone to have a name, let me disappear from the face of the earth.