Ron Stallworth. El Paso (USA), 1953. A veteran police officer, with thirty-two years of service and decorated with the highest distinctions, who worked as an undercover agent in the departments of narcotics, vice, criminal intelligence and organized crime in four states . As the first black man in the Colorado Springs Police Department, he had to overcome fierce racial hostility to develop his long and distinguished police career. After closing his investigation into the Klan, Stallworth kept everything a secret. He went on to work for the Utah Department of Public Safety as an investigator for nearly twenty years and retired in 2005. In January 2006, he gave an interview to the Salt Lake City Deseret News in which he finally recounted the details of his brilliant infiltration and investigation. This helped to uncover the relations of the Ku Klux Klan with the Government of Colorado and also how several members of this racist group worked in the Army or even in military organizations as important as Norad, with access, for example, to nuclear missiles. Many of them were reassigned after knowing their affiliation to the Klan. In 2014, Stallworth published the book Infiltrated the KKKlan, about his experiences in the KKK investigation. The book has been made into a film and the film has so far won the Grand Jury Prize at the Cannes Film Festival in 2018. It will be released worldwide in November 2018.