Mountain Witch's Cutlery (Part 2)

Tanaka dismisses Mitsuhiko's accusation as his imagination and the police continue their investigation. Agasa notes that his hammer is missing and Conan discovers an officer found the hammer in the woods. Conan later finds the rumored knife with the red handle and shows it to the police. None of the weapons reacted to luminol and leaves the officers stumped.

Synopsis excerpt via Kitsu.