Is The Gangster The Cop The Devil Based On True Story -

The film is praised for its realistic portrayal of South Korean organized crime (the Kkangpae).

To help clarify, here is a direct comparison between the film’s plot and the historical reality: is the gangster the cop the devil based on true story

| Element | In The Gangster, The Cop, The Devil | In Real Life (Yoo Young-chul / Kim Tae-chon) | | :--- | :--- | :--- | | The Incident | Serial killer stabs mob boss; boss survives. | Serial killer attacks mob boss with crowbar; boss wins the fight. | | The Alliance | Gangster and Cop form an official, secret pact to catch the killer. | No alliance. The police were already investigating. The gangster hunted the killer alone. | | The Motivation | Cop wants justice; Gangster wants revenge for his wounded pride. | Gangster acted purely out of pride and territory protection. | | The Ending | The cop arrests the gangster after the killer is caught. | The gangster was already a wanted criminal. Both the killer and the gangster went to prison separately. | | The Killer | A young, handsome, smiling psychopath who kills randomly. | A middle-aged, awkward construction worker with specific hatred for rich people and sex workers. | | The Daughter | The killer targets the gangster’s daughter. | No such relationship existed. Yoo targeted strangers. | The film is praised for its realistic portrayal

To understand the film’s roots, you have to look at a real person: Yoo Young-chul. He is one of South Korea’s most notorious serial killers, active between September 2003 and July 2004. Known as the "Raincoat Killer" (due to demanding his victims wear a raincoat during the murders) or the "Happy Day" killer (after a message he carved on a victim), Yoo Young-chul confessed to murdering 20 people—mostly wealthy elderly people and female masseuses. | | The Alliance | Gangster and Cop

However, the specific connection to The Gangster, The Cop, The Devil lies in how he was almost caught.

If you enjoyed the film for its realism, you’d likely appreciate Korean true crime documentaries like The Raincoat Killer or In the Name of God — both based on factual serial killer cases.