Conan discovers a hoop earring underneath a couch in Yoko's apartment. Yoko reveals this earring to belong to Yuko Ikezawa, her rival.
Yuko, despite claiming never to have been in Yoko's apartment before, seems to know where the bathroom is located and that the Statue of Liberty figurine in the apartment is actually a lighter.
Yamagishi explains that Yoko's apartment's spare key has been missing for awhile.
Yamagishi removed a strand of hair from Fujie's hand when he pretended to slip on the floor. When Conan retrieves the hair he realizes Yamagishi must think it belongs to Yoko.
Conan discovers an odd indentation mark on the floor as well as traces of water. He also notes that it is strange that only a chair is knocked over on the floor near the body.
Megure upon entering Yoko's apartment notes that the room seems to be at an unusually hot temperature.
Conan knocks Kogoro unconscious by kicking him in the head with an ashtray. Using the voice-changing bowtie, Conan as Kogoro reveals the truth behind the strange things that happened to Yoko as well as the murder.
Yuko is responsible for the missing apartment key, threatening phonecalls, etc. This is why Yuko knew where Yoko's bathroom was and why she knew the Statue of Liberty was actually a lighter.
Conan as Kogoro reveals that the Fujie's murder was not a murder at all; Fujie committed suicide. Fujie committed suicide by freezing a knife inside a block of ice and then falling backwards onto the knife from the chair in the room. The odd indentation in the floor was caused by the knife when Fujie landed on it. The water spots on the floor are from the melted ice. Before killing himself, Fujie turned up the heat in Yoko's apartment in order to melt the ice, and therefore evidence, away.
Yuko's motive for playing mean pranks and tricks on Yoko was to frighten her.
Fujie's motive for committing suicide was Yuko's startling reaction to Fujie grabbing her on the shoulder. Mistaking Yuko for being his only love Yoko, Fujie took this reaction to mean that Yoko never wanted to see him again. Unable to bear with this thought, Fujie committed suicide.
