Due to the housemaid’s behavior, Conan pressures the housemaid about the vase. That night, Kogoro and Conan ambush her in the middle of returning the vase to the crime scene. The next day, court resumes and Reiko presents the documents pertaining Ishigaki’s burrowed money and the murder weapon found in a distant pound. Eri calls the maid up as a witness who explains she found the vase at a garbage collection point. Eri then calls upon Kogoro whom Conan tranquilizes and reveals the culprit to be the brother-in-law, Tooru Tsukano. Conan explains that after Tsukano murdered Ishigaki, he took a document, hunt up the painting, and hid behind the door as Iwamatsu entered the room and knocks the vase to Tsukano’s feet. Tsukano hides the knife and gloves inside the vase and leaves the vase at the garbage collection point and establish and alibi. He then afterwards placed the knife in the park and disposes the gloves he used to commit the murder.
