In 1972, New York City was plagued with protests, riots, and general unrest. It was during this defining year that one of the police department's most scandalous cases occurred: the murder of Police Officer Phillip Cardillo. On Friday, April 14, 1972, the police were summoned to Mosque Number 7 in Harlem, led at the time by the Nation of Islam's Louis Farrakhan, for a ten-thirteen: officer in need of help. The turn of events after this officer distress call has become perhaps the most legendary story in NYPD history. Police entered the mosque and a conflict occurred, leaving Officer Cardillo dead and the city on the brink of a full-scale riot. Sensing a potential crisis and conflict with the Nation of Islam and the Black Liberation Army, New York City Mayor John Lindsey, Commissioner Benjamin Ward, and Congressman Charles Rangel acquiesced to the city's black leaders and ordered the police out of the mosque. Subsequently, the details of Officer Cardillo's murder and the events of what happened at the mosque were covered up. An investigation was never truly launched until NYPD Detective Randy Jurgensen began his own investigation. For four years, he would not rest, taking on the mayor, his superiors in the NYPD, the Nation of Islam, and seemingly at times, the entire city of New York, before he could affect an arrest. His investigation revealed the tragic and shameful story of the political scandal and cover-up that rocked the NYPD and the Nation of Islam. "Circle of Six" is the harrowing true crime expose that lifts the curtain to reveal the raw story behind one of the most debated cases in the history of the New York City Police Department. Officer Cardillo's murder is still an officially unsolved crime to this day. Written by Randy Jurgensen with Robert Cea, also a former NYPD detective, it details Jurgensen's determined effort to bring Officer Cardillo's murderer to justice. Despite the mayhem on the streets and the Machiavellian corridors of Mayor Lindsay's City Hall, Detective Jurgensen captured Cardillo's killer, Lewis 17X Dupree. He broke the case with an unlikely accomplice, Foster 2X Thomas, a minister for the Nation of Islam who became Randy's witness and would eventually help put Dupree behind bars.