Eric David Harris (April 9, 1981 - April 20, 1999) was an American high school senior who, along side Dylan Klebold, commited the Columbine High School massacre. The pair killed 13 people and injured 24 others. The two proceeded to commit suicide in the library, where they had killed 10 of their victims. The attack was the deadliest ever perpetrated against an American high school.