"[3] Stallworth graduated from Austin High School in 1971, where he was both a member of the student council, and of a district-wide advisory board; he was also voted "most popular".

[1] In 1978, Stallworth noticed a classified ad in the local paper seeking members to start a new chapter of the Ku Klux Klan in the city.

A Klan member phoned Stallworth, who then posed as a racist white man who "hated Blacks, Jews, Mexicans, Asians".

Stallworth phoned David Duke, who was the Klan's Grand Wizard at the time, at his headquarters in New Orleans to ask about the status of his membership application.

After retirement he earned a bachelor's degree in criminal justice from Missouri's Columbia College's Salt Lake City Campus in 2007.

[8][9] In January 2006, Stallworth gave an interview to Salt Lake City's Deseret News in which he described his infiltration and investigation of the Klan[10] and later disclosed that the investigation revealed several members were on active duty with the U.S. Armed Forces, including two individuals posted at NORAD (the North American Aerospace Defense Command, which provides aerospace warning, air sovereignty, and protection for Northern America).

[13] The film was released nationwide on August 10, 2018, and in select theaters two weeks earlier, with John David Washington as Stallworth, Adam Driver as white undercover officer Flip Zimmerman, and Topher Grace as David Duke alongside Laura Harrier, Ryan Eggold, Corey Hawkins, Alec Baldwin, Jasper Pääkkönen and Harry Belafonte.