237화: 난키 비치 미스터리 투어 2부: 수사 계속

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Conan investigates and finds out that Madoka was cheating on her boyfriend with another student, Fuji, but that none of them committed the murder. Conan also reveals through Mouri that Maki had originally been planning to kill Madoka for stealing her boyfriend. Maki created her own alibi by asking Kanoko to pretend to be her and have Mouri, Ran, and Conan see her at the station. It is also revealed that the mysterious person that was watching Conan was Kanoko. Kanoko then returned and killed Maki because Maki had helped her get into the university illegally by asking her father to let her into the university. (Source: Wikipedia)