Manga of Case Closed...

Case Closed, also known as Detective Conan, is an ongoing Japanese detective manga series written and illustrated by Gosho Aoyama.Due to legal considerations with the name Detective Conan, the English language release was renamed to Case Closed.
The story follows an amateur detective who was transformed into a child while investigating a mysterious organization, and solves a multitude of cases while impersonating his friend's father and other characters.

I believe that you must know and look the manga, how about it?