Matti Juhani Saari, a trainee chef, arrived at the Kauhajoki School of Hospitality at 11am local time with a pistol, ammunition and explosives in a large black bag, then pulled on a balaclava and began his killing spree in a classroom where 20 people were sitting an exam. "He was very well prepared," said Jukka Forsberg, the caretaker. "He walked calmly. He didn't say anything. He was cold-blooded." Describing how he first realised what was going on, Mr Forsberg said: "I heard the sound of shooting and hysterical girls' voices. Then two girls came towards my room and said a...