You don't need a diamond detective to keep you from getting scammed at the jewelry counter. If you're a first-time diamond buyer, you've probably asked yourself how to know if a diamond is real ...

A racketeer's bookkeeper gets Diamond involved in a blackmail scheme against his boss, when he asks him to find a book and gives him only one hour to do so. An acquaintance of Diamond's is murdered.

One day Mori Kogoro's private detective agency receives a blackmail call. It turns out that the caller has dialed the wrong number. Conan is able to identify the voice on the phone, it's similar ...