After realizing his mission against the Black Organization, the arms dealer is never mentioned again.

Aborted Arc: When Shinichi is first shrunk into Conan, he attempts to report the arms dealer the Black Organization was blackmailing before he got drugged, but the police don't believe him.

However, Shinichi survives thanks to a one-in-a-million failure rate and discovers that the side effects of the drug have instead de-aged him into a six-year old body.

The men force-feed him an experimental poison that is supposed to kill without leaving a trace, and flee the scene. One day he happens to witness a crime committed by two men in black and is knocked out by them. His sharp analytical mind connects clues faster than anyone else, and local law-enforcement agencies frequently ask him for help. Shinichi Kudo is one of the world's foremost detectives, and he's only in high school.

and having surpassed 1000 issues, it's in 23rd place in terms of manga volumes. Seriously, with over 1000 episodes, the anime is currently at 16th place in terms of total number of anime episodes, note or 10th that is still in production. The manga began serialization in 1994 and the anime began airing in 1996 both are still ongoing. Case Closed (aka Detective Conan), written/drawn by Gosho Aoyama ( Magic Kaito and Yaiba) and published in Shogakukan's Shonen Sunday, is a very long-running manga and anime series.

Detective conan all episodes in english