Dylan Klebold

Age: 17

Summary: student at Columbine High School and mass murderer who was believed to have been one of the two gunmen who had shot and killed 12 students and a schoolteacher inside the school's library near the science room, in which it became one of the fourth-deadliest school shootings in United States history since 1927.

Cause of Death: Suicide by self-inflicted gunshot wound

Born: September 11, 1981

Died: April 20, 1999

Location: Littleton, Colorado