Stage Actress Murder Case

Situation
Kogoro is given a case to solve the sender of a threat note. His teacher appears at his house and decides to go to the theater, too. Conan and Ran tag along. Kogoro's case turns into a murder, but he soon breaks his backbone before Conan can solve it.

Resolution
« Hide spoilersThe culprit is Hitomi Sasaki. She used a fishing line to drip poison into Shoko's glass, using a star suspended above the set as a guide to accurately drip the poison into her glass (which was pre-positioned in accordance with play guidelines). She has marks on her hands and the marks were made when she tried to force the fishing line off the star, she must have panicked. After the murder, Kogoro Mouri ordered everyone to stay put, and the fishing line used in the murder should be still in her pocket. Hitomi confesses that Yuuichi broke up with her to be with Shoko, but she already accepted his decision. However, Shoko broke up with Yuuichi and says that Yuuichi is boring and airheaded, that she will give him back to Hitomi and laughed in a haughty manner. That is why Hitomi killed Shoko because she couldn't forgive her for the fact that she wasn't serious about the relationship and that Shoko just wanted to take Yuuichi from her. After the case is over Heihachiro Shiota decided to take over the Detective Agency until Kogoro fully recovered but has his ambition stopped by Mrs.Shiota who come to "pick up" her husband. Heihachiro is then taken away.