Meitantei Conan › Season 1

Chapter 28 — Kogoro's Reunion Murder Case (Part 2)

Conan identifies two things strange facts about Yumi's body; the finger was not on the trigger and she was naked under her robe. Conan, after hearing about the legendary Benkei, realizes who the murderer is and plans to tranquilize Kogoro in order to solve the case. Conan instead decides to drop subtle hints and let him do it himself. Kogoro gets to the bottom of the situation, identifying Yumi's killer as police detective Nakamichi Kazushi, further explaining how Yumi died later than originally estimated, exercise from table tennis caused her body to undergo rigor mortis much earlier. He changed Yumi's clothes and wiped the sweat from her body so authorities wouldn't question her activities prior to death, and it was a statement that Kazushi made suggesting he knew Yumi was already dead before the others that seals his fate. Kazushi confesses that he has dated Yumi for 18 years and he proposed to her multiple times but was always turned down. Yumi terrorized Kazushi and a woman he became engaged to later on. When the Judo members question Kazushi on his actions, he attacks them but is slammed down by Kogoro, who leaves him for the police to arrive. (Source: Wikipedia)