By 12:08, both gunmen had killed themselves. Harris sat down with his back to a bookshelf and fired his shotgun through the roof of his mouth; Klebold went down on his knees and shot himself in the left temple with his TEC-9. An article by "The Rocky Mountain News" stated that Patti Nielson overheard them shout "One! Two! Three!" in unison, just before a loud boom, however Nielson claimed that she had never spoken with either of the writers of the article.