Harvey makes a remark about how the circumstances almost make him feel bad for Wayne and when asked to elaborate he explains how people like Wayne don't get how Gotham works like him and Batman, and that he can talk about what Gotham is, and was, and will be all he wants but that it truely is a mystery above anything else. As this is said Batman gets a call from Alfred that traces a DNA sample in the crime scene belonging to Dick Grayson, suggesting that he could somehow be the killer.