Kindaichi Shounen no Jikenbo EP69 - Inspector Kenmochi's Secret File 2

Kenmochi presents Hajime with another case. A computer teacher named Nanako Segawa is found dead in a park. Yuri Mishima, a student from the computer school is arrested for the murder, but Hajime thinks that this is an exchange murder, and there is a mastermind behind the killing. There are three suspects who also use Yuri's computer, and none have adequate alibis. After examining the computer room and the evidence, Hajime believes he knows the culprit. Suddenly, the student Rumi Nakajima threatens to throw herself off the rooftop rather than be accused of Segawa's murder, however Kenmochi intervenes and stops her. Hajime then explains the mastermind is someone who knows that Mishima is a frustrated rival to Nakajima for the handsome Yoshiki Maruyama's affection, and Hajime accuses Kenichi Hamaoka, a teacher in the computer class. Hamaoka admits that he discovered that Segawa was embezzling money from her family's company and initially helped her, but he became afraid of the consequences and planned to have her killed, using Mishima as his tool.