Spanaway, Washington

Armed with a .22-caliber rifle, 14-year-old Heather Smith shot and killed 15-year-old Gordon Pickett, her ex-boyfriend, and 14-year-old Christopher Ricco in the gymnasium at Spanaway Junior High School, before fleeing the school grounds. She later returned to the school and, after a short standoff with police, shot herself in the mouth. Smith died the following day.