Columbine High School shooting victim Corey DePooter, 17, seen here in this 1998 yearbook photo, was shot and killed Tuesday, April 20, 1999, when a gunman opened fire in the high school in Littleton, Colo. Neal DePooter confirmed that his son, Corey, was killed, but declined further comment. (AP Photo/Rocky Mountain News, File) MANDATORY CREDIT; MAGS OUT; ONLINE OUT; TV OUT; CODEN OUT