A teen gunman armed with a rifle shot and killed a 14-year-old student Tuesday and injured a teacher before he likely killed himself at a high school in a quiet Columbia River town in Oregon, authorities said.
According to Everytown.org, it was the 74th school shooting in America since the Sandy Hook Elementary School shooting massacre in December 2012.
Everytown classified incidents as a "school shooting" when: "a firearm was discharged inside a school building or on school or campus grounds, as documented in publicly reported news accounts.
This includes assaults, homicides, suicides, and accidental shootings. Incidents in which guns were brought into schools but not fired there, or were fired off school grounds after having been