Gadgets introduced
Cast
Gadgets
Case
Situation
Part 1
Ran, Sonoko, and Conan run into their old third grade teacher, Akiko Yonehara, who invites them to spend the night at a Mountain Villa. A mysterious journalist arrives and tells them a massacre similar to three years before will happen that night. Can Conan help find the clues before too much damage occurs?
Attempted Murder
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Attempted Murder
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Murder
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Victim:
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Sugiyama
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Cause of death:
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Strangulation
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Part 2
Conan is unable to figure out how a piece of rope disappeared, but when he figures out who is wearing a wig, he realizes that the person has killed two people on the same night. Using Ran to reveal the secret by using his own voice, Shinchi reveals the information to everyone present, but the revelation will shock everyone involved, especially Ran and Sonoko.
Murder
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Victim:
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Kohei Shimoda
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Cause of death:
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Strangulation
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People
Resolution
The killer was Akiko Yonehara, inspired by the death of little Minako Mochizuki. Minako had found out that Sugiyama and another teacher (Shimoda, but she didn't tell that to Yonehara) were involved in a fraud, and added that she was planning to confront the unnamed teacher. The little girl was found hanged in the school gym few days later, and Yonehara deduced that she had been killed by Sugiyama and his accomplice.
Knowing the identity of only one of Minako's two murderers, Yonehara organized the trip to gather the teachers that she knew Minako was a fan of. She first killed Sugiyama and left his body out there to freeze and trick people in regards to the time of his death; later, she attacked Sonoko to have an alibi, then immediately afterwards pretended to be a victim as well (using Sugiyama's body to such effects), and used her lipstick to spell out Minako's name in all of these cases. Shimoda's panicked reaction upon realizing the last detail revealed his involvment, so she tricked him into meeting up with her and killed him as well.
The murder weapon was her wig: she had cut her hair too short for her liking a while ago and hid it via long wig, and then decided to use it to strange her victims (and Sonoko) without leaving clues.
See also