After a thorough investigation, Conan tranquilizes Kogoro and reveals the culprit to be Shirou's wife, Kyouko Shabata. Conan reveals that the photograph was used to hide the Shirou's real dying message, his wedding ring covered in blood in his right hand. Conan reveals that Kyouko falsified Shirou's time of death by placing the morning newspaper by Shirou's late-night snack to present it as breakfast and by using a timed videocassette recorder to record a show. Kyouko confesses and reveals that Shirou was gambling them into debt and she was forced to kill him. She attempts to kill herself, but Ikenami stops her. Heiji and Kazuha arrive and reveal that Ikenami is actually Heiji's mother. Ikenami confesses and tells Kogoro that she wanted to see what kind of person he was since Heiji was injured the last time he stayed over.