Oh I hadn't noticed that, it makes no sense at all. That gives the Gs an unfair advantage. They should only know who the detective investigates, not what role the investigated player has. We might as well hope the D won't investigate a special role this way while it must be normally an achievement for the D.
I don't believe Deneb is a G, but the way Sheik has been acting is totally the same like when we were Gs together. A clear example is the joke he pulled on Janna last night.