A serial killer known as DGK (The Doppelgänger Killer) makes a fatal mistake when he kidnaps the wife of one of the most decorated FBI Agents in U.S. history. A serial killer known as DGK (The Doppelgänger Killer) makes a fatal mistake when he kidnaps the wife of one of the most decorated FBI Agents in U.S. history. A serial killer known as DGK (The Doppelgänger Killer) makes a fatal mistake when he kidnaps the wife of one of the most decorated FBI Agents in U.S. history. A serial killer known as DGK (The Doppelgänger Killer) makes a fatal mistake when he kidnaps the wife of one of the most decorated FBI Agents in U.S. history.