Ep. 336: Police investigation reveals Akira's motive while Conan exposes Yoshikiko Negami as the true killer using a button clue.

336

Police determine Furumura’s camera recorded no suspicious sounds during the attack, though they suspect Akira due to his financial motive stemming from Furumura ruining a film. Conan summons Agasa to reveal Akira as a suspect and explain the significance of a missing shirt button. The culprit later returns to Akira’s apartment to retrieve the button, allowing police and Agasa to set a trap that identifies employee Yoshikiko Negami as the murderer. Using a voice-changing bow-tie, Conan explains that Negami utilized fluorescent tape to move silently across the room and paint Furumura’s button to facilitate the stabbing. Negami confesses, noting the ruined scenes could not be reshot because a lead actor had died. Meanwhile, Conan informs Haibara that he had Takagi test the stalking black car occupants for alcohol, and their smoking indicates the suspects have lost their trail.