Case Closed - Season 1 Episode 578

The Detective Boys run into a strange man named Kyouzou Daita who invites them to a cake shop after they apprehended a thief who robbed him. While talking with him, Conan notices the man is acting strangely. That night, the Detective Boys confront him and reveal he plans to kill himself and make it look like an accident in order to use the insurance money to pay for his grand daughter's surgery. Daita confesses and reveals that after losing a winning lottery ticket, he contemplated suicide was his only option. Conan deduces that the lottery ticket is in his reading glasses case containing his after hearing his story. Daita, happy to have the money for the surgery, jokingly tells the Detective Boys he also thought of robbing a bank causing the Detective Boys to discuss the fact that a man resembling Shuichi Akai's description was at the bank.