Question: How do Dent and Gordon find out that Lau was the one who took the mob's funds? And also how do they find out that Lau transferred the funds to Hong Kong?
Chosen answer:Probably when Lau confessed to everything after Batman, acting above the law, kidnapped him from Hong Kong and brought him back to Gotham.
Chosen answer: Probably when Lau confessed to everything after Batman, acting above the law, kidnapped him from Hong Kong and brought him back to Gotham.