The St. Pius X High School shooting occurred on October 27, 1975, at St. Pius X High School in Ottawa, Ontario, Canada. It was Canada's third recorded school shooting. The gunman, Robert Poulin, an 18-year-old St. Pius student, opened fire on his classmates with a shotgun, killing a 17-year-old classmate named Mark Hough and wounding five others before killing himself with a single shotgun blast to the head. Earlier that day, Poulin had raped and sodomized a 17-year-old Sri Lankan girl named Kim Rabot in his own bedroom before stabbing her to death. That afternoon, he had traveled to the St. Pius X High School to embark upon his shooting spree.