Peter Dupas, Serial Killer A Collection of True Crime

While he was still in his school uniform, Peter Dupas walked over to his neighbor's house and knocked. The 27-year-old mother was breastfeeding her five-week-old baby when she heard the knock. She answered the door, and was surprised to see the young boy at her door. She welcomed him into the house and asked why he had come over. He asked to borrow a sharp knife. He was supposed to be peeling potatoes, and they did not have a knife that was sharp enough at home.
Pleased that he was such a nice helpful son, she praised him. After she handed over the knife, she was still talking when she saw him lunging at her, the knife tightly gripped in his hand....thus beginning his serial killing career.