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St. Louis, MO (KSDK) - This story sounds like something right off of the back of a crime novel; but it's the true story of how a handsome, charismatic drug dealer in Chicago ended up working as an undercover informant in one of the roughest prisons in the country.

That prison: in Springfield, Missouri. The mission: find a possible serial killer.

NBC's Lester Holt talked Kay Quinn during First@4 about the story of "The Inside Man," airing tonight on Dateline. Watch the video player above to learn about the movie rumors surrounding this story and Brad Pitt's possible involvement.