After investigating Genda's home, they find out that there were covert listening devices in planted by Soga and Gondou and realize who the culprit is. That night, the three culprit enter Genda's house with Soga and Gondou retrieving their listening devices. Heiji and Conan confront Akira Morozumi before he could start a fire and declares him as the culprit. They reveal that Akira, Genda's psychiatrist, made him believe he was starting the fire but in reality, the first fire was an accident while the other three were done by Akira. Heiji reveals that Akira started the fourth fire by wrapping a light bulb with sheets of paper and placing a match in between the sheets. When it reached a certain temperature, the match would ignite and begin the fire. Conan reveals that the other two suspects merely used the listening device to trick Genda into believe they could predict his future. Akira is later arrested and Genda is released from custody.