Episode 398: The Weird Family's Commission (Part 1)
Scenario: Ran sends a message to Shinichi's phone only to find Conan's phone has also received the message causing her to suspect Conan of being Shinichi. A woman named Tomoko Kiriya hires Kogoro to search for her cellphone which contains messages of her affair. She attempted to call her phone and someone always hangs it up. She suspects that her either her father-in-law, brother-in-law, or husband has her phone. After questioning the three, Tomoko calls her phone and finds it and sends Kogoro away. While heading home, Conan learns from the news that Tomoko was found dead in her car after being stabbed and bludgeoned.
Kogoro, Ran, and Conan return to the Kiriya home with the police to investigate. The three have established alibis: The father was heard behind the shōji, the brother's shadow was seen by the shōji, and the husband's pipe smoking was smelt. After ruling out the man having an affair with Tomoko, the police's investigation leads them to believe the case is somehow related to a murder twelve years ago which was done by Eisuke Kiriya, the third family son who disappeared after being suspected for the murder of his fiancée. The man, who Tomoko had an affair with, turns out to have an alibi. Strange things had been happening in the house lately. An old friend of Eisuke had called Tomoko, to ask about phone calls he has been getting from her cellphone. With Conan's help the police concluded that the thief, who took the phone, must have been someone who wouldn't be disturb for a long time, which is needed to figure out the password to the phone. While Conan is thinking, Ran waits for Conan to call Shinichi and when he does Ran would get the phone and talk with Shinichi.