In addition to a video confession, Cho included an 1,800-word diatribe, which he aimed toward the rich and privileged. He included 24 photos, apparently meant to further express his anger, rage and resentment. In two photos, he smiled, while in others, he posed with frightening expressions, holding weapons. In his documents and video he addressed the audience as a villainous "you." At left, Cho points a knife at the camera. (NBC)