L placed Tailor as a decoy to The network states that the broadcast is worldwide and that Tailor's statements (made in English) are being translated into Japanese by Yoshio Anderson. After Tailor states that he is "L," he reads a declaration stating that Kira is evil. Light Yagami, who is secretly Kira, uses the Death Note to kill Tailor with a heart attack, enraged by "L" calling him evil.
When Light killed Tailor, he fell into the real L's trap. Thanks to his death, L was able to figure out how Kira killed and to narrow his location to the Kanto region of Japan.