Kogoro's Reunion Murder Case (Part 1)

Synopsis

After stopping an armed robbery, Kogoro encounters his friend Horikoshi Yumi in the crowd. Yumi mentions to Kogoro that the Judo class reunion was going to take place later that day and she leaves. When the police takes the criminal away, they ask Kogoro for his dropped weapon, but is unnerved to discover it missing. At the reunion that evening, the Judo club (consisting of Ayashiro Yukio, his wife Ayashiro Noriko, Omura Jun, police detective Nakamichi Kazushi, and Horikoshi Yumi) play table tennis, they then plan to go out and watch the fireworks. Yumi stays behind to take a nap. Kogoro, Ran, and Conan are the only ones who attend the fireworks. At dinner, the Judo club members decide to wake Yumi up from her nap; instead they find her dead from an apparent self-inflicted gunshot wound to her temple. Kogoro and Kazushi are horrified to discover no burn marks on Yumi's wound, meaning she was murdered. (Source: Wikipedia)