Quote Originally Posted by masamuneehs
And he almost definitely told Suzaku about Lelouch being Zero. The composure in Suzaku's face and "there's something I want to tell everyone" and the talk about his now being motivated by hatred. plus what reminisc pointed out.
this...
I've seen this theory elsewhere, but honestly I don't think Suzaku knows Lelouch = Zero yet. V V probably told him about the Geiss, and that Zero had it, and that's what made Euphie go nuts. I think he called Lelouch for support and to talk this whole murder/revenge thing out with someone who's had experience with it. Veiled threats aren't really Suzaku's thing, and he thanks Lelouch for the help, which I don't think would happen if he was talking with his girlfriends' killer.