Well, I think Kaji actually isn't bluffing, but the killer might try to call him out on it by looking through the guy's cards and seeing that the guy still has like 10 or something.
Prediction: It will somehow land on F. Afterwards, it will land on C, exposing the murder case. Ooshii will end the show exposing his crime voluntarily.
My issue with this game is that they are supposed to be broadcasting all this to TV, with a live audience too.
Unless that is controlled somehow, this should be a mess, not a clean game of deception.