林超賢
Despite having much of the same cast of his previous hit film "Beast Stalker", Dante Lam said "The Stool Pigeon" is not a sequel. Dante stated that he "felt the pressure when I was working on the new movie because "The Beast Stalker" did so well and received a lot of positive feedback. I did not want the new film to live in its shadow because it is an entirely different movie, except with the same cast." Dante Lam chose the theme of an informant in the film, stating that there is "Hong Kong shoot-out film on this theme yet. It's a good subject for exploring human nature and I have done research with involved people in real life".