After investigating, Conan realizes how the murder was done. Conan tranquilizes Kogoro and declares Misumi to be the murderer. He reveals that Misumi drove Ami in that car and drugged her to sleep. He then taped all the doors but made a cut along the passenger door allowing him to leave. Conan explains when Misumi broke into the car to save Ami, he only pretended to cut the passenger door open and that it was cut already. As evidence to prove he was the murderer, Conan reveals that the book in the car came out on that same day and that Misumi's fingerprints were on the cover. However, Misumi reported that his girlfriend went missing yesterday. Misumi confesses and reveals his girlfriend was cheating on him even though he gave her so much.