Initially, it looks like an accident or suicide. But Conan notices the critical contradiction: Keisuke’s watch is broken, showing the time of 2:15 PM, and the date on the watch is the day he disappeared. However, the pathologist later confirms that the time of death was around 8:00 PM that evening. If he fell at 2:15 PM, he couldn’t have died at 8:00 PM. Therefore, the watch was smashed deliberately to mislead investigators.
This episode is an anime-original story (filler) that aired on June 13, 2005. It is a single-episode case featuring Conan, Ran, and Kogoro Mouri. Opening Scene: The Afternoon at the Mouri Detective Agency Detective Conan Episode 406
Yukie breaks down. She admits to the murder but says, "He took my sister’s future. He deserved to die. And that locket... he didn’t deserve to wear her face." Initially, it looks like an accident or suicide
They search the surrounding forest. About 200 meters from the car, hidden behind a thick bush, they discover a narrow, overgrown trail leading to an abandoned, decrepit shrine. Inside the shrine, they find more clues: a discarded, empty bottle of sleeping pills, a woman’s hairpin, and a man’s muddy shoe print. If he fell at 2:15 PM, he couldn’t have died at 8:00 PM
Yukie discovered the truth about the locket one year ago. She found the old photo and recognized her sister. She realized her husband was the man who killed her sister. She pretended not to know, but she began planning her revenge.
Conan, using his voice-changer bowtie (but as himself, not as Kogoro yet), points out: "If he crashed or got lost, why would he take his locket but leave his briefcase and car keys? It doesn’t make sense." Kogoro, annoyed as always, dismisses Conan’s comment but secretly agrees.