Meitantei Conan

Synopsis

Paul Keen is found strangled to death. Conan finds a strain of hair around his neck and fishing line outside around the pillows and realizes how the murders were done. Rachel, under Conan's guidance, reveals that Larry was murdered well before anyone arrived and his corpse was tilted in front of the door with fishing line and a rubber band that snapped due to the cold air allowing his body to fall forward. Mr. Keen was murdered shortly afterwards with the killer taking the weapon with them: Anne Preston is revealed to be the killer; she faked her own attack (using Larry's frozen corpse) then made an attempt on Serena’s life, evidence against her is the wig on her head, which was the murder weapon all along; it yields blood belonging to Paul Keen. Anne confesses stating her motive as revenge for Moreen, who she believes was killed and her death staged as a suicide after she told her that Larry and an unnamed accomplice used her influence to get students into their school illegally. Rachel, beyond devastated that her teacher is a murderer, breaks down crying on Conan shortly afterwards.

(Source: Wikipedia)