The White Sandy Beach Murder Case

Episode 113 of Detective Conan (Case Closed).

Dub edit

 * In the original dub, Dr. Tanaka killed Mitsuko Sekine because despite them being a couple, He was arranged to marry his boss' daughter, which would be good for his career and wanted to get rid of her in order for her present to ruin his chance. In the Funimation Dub, Dr. Tanaka (who went by Dr. Marshal Kennedy) killed Mitsuko Sekine (who went by Annie Evans) because she was planning to break up with him and end their engagement due to him having a terrible angry issue as he was only angry at her and no one else.