Since the man who owns the bank was smiling at his wife's dead body, Conan gives close look of keen eye at the Crime Scene. He ask himself - how did Banker kill his wife while he phoned her? Then Conan realized the hidden truth of a case, and he decide to let them recognize it. Closely took part in the Scene, Conan gives the police small clues and they eventually find out that the man killed his own wife and staged the robbery to his own bank.