قسمت 171: کونان با استفاده از تله‌ی نور سنجاق و دستکاری کلید، یوکو آرایده را به عنوان قاتل فاش می‌کند.

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Conan establishes that Yoshiteru was murdered and finds several clues missed by the police including a broken piece of a vase. Mitsu suffered a small cut and Hikaru burnt herself. Conan, through Kogoro, announces his experiment to solve the case, however, it is actually a trap to catch the killer, Yoko Araide. Conan deduces that Yoko flashed her pin light in Yoshiteru’s face so he wouldn’t see her sliding the razor into the bathtub. Hikaru flipped the breaker back on, thus killing Yoshiteru, as planned by Yoko. Prior to the murder, Hikaru broke another vase and hid it out of fear of being fired. Mitsu stepped on a shard on the second floor, and Tomoaki was held by Ran during the situation, leaving Yoko the only one with ample opportunity to commit the murder. Yoko confesses that her friend Chaiki was married to Yoshiteru but committed suicide due to his infidelity. She would then marry him to exact her revenge. Conan requests Yoko to bend the truth to spare Hikaru from knowing she is the actual cause of her employer’s death. After the case, Ran asks Tomoaki for his sweater so she can knit a similar one for Shinichi. (Source: Wikipedia)