Alibi Testimony Murder Case

Situation
Kogoro, Ran, and Conan are meeting a lawyer named Souhei Tatsumi who's office is in a hotel. While there Conan picks up a phone call from Souhei's wife Kazumi Tatsumi. During the phone call, an musical melody is heard from Kazumi's side. Souhei takes over the phone call and tells his wife he will call later and asks Conan and Ran to leave so he may talk with Kogoro. Kogoro returns telling Conan and Ran he took Souhei's request to spy on Kazumi and her affair. On the way home, they spot police cars in front of a house and decide to investigate. They found out it is Souhei Tatsumi's house. Inside they learn that Kazumi was found dead in the bathtub.

Conan suspects Souhei to be the murderer but Kogoro confirms his alibi. Conan investigates the hotels and learns the hotel room beside Souhei's is reserved for guests and also learns the musical melody from a musical box alarm clock is custom made for that hotel. At Kazumi's funeral, a man named Shunsou Hirose reveals he was Kazumi's lover.

Resolution
Hide= The officers plan to arrest him until Conan tranquilizes Kogoro. Impersonating Kogoro's with his voice changing bowtie, Conan reveals Souhei Tatsumi to be the culprit. He reveals that after Tatsumi was done with Kogoro, he murdered his wife who was in the guest room beside him. Afterwards he placed his wife in a bag and put her down a chute to the bottom floor. He then went to the bottom floor, placed her body in the trunk and drove her home where he then placed her body in the bathtub. As evidence, Conan gives Megure a tape of the alarm clock in Tatsumi's guest room to compare with the recorded phone call. The alarm clock in the guest room is revealed to have a missing note and matches with the musical melody in the phone call. Souhei confesses to the murder and reveals Kazumi was blackmailing him for money in order to keep his corrupt deeds as a lawyer hidden.
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