User blog comment:Neowitch/664 - Exposure and Exposition/@comment-3125914-20120418140155/@comment-3387274-20120418173744

how so?

"Ceasar Clown apparently works with a person or group known as Joker, and contacted them by Den Den mushi. Who or what Joker is has yet to be revealed"

Statement of a confirmed fact in the manga, which doesen't ever go into speculation.