From the Washington Post:
When 18-year-old Hans Van Themsche was expelled from his boarding school dormitory for smoking, police officials here say, it pushed him over some existential edge. He shaved his head, bought a Winchester hunting rifle, put on a black leather trench coat and wrote a note saying he was going to kill foreigners. Then he went on a shooting rampage in the narrow cobblestone streets of this ancient port city.
Here.