Dylan Klebold
17, a senior, was the second gunman. He died of an apparent self-inflicted gunshot wound to the head after going on what has been called a "suicide mission." He was a member of Columbine's Trenchcoat Mafia � a group who friends say always wore black, listened to Gothic music and spoke German to each other � he and his friend Eric Harris were said to be smart and computer savvy, and to enjoy video games. "Like the rest of the country, we are struggling to understand why this happened," Klebold's family said.