August 29, 1988, was the day Wilfred “Willie Boy” Johnson’s long and dangerous double life finally caught up with him. Johnson, a reputed New York mobster and close associate of John Gotti, was gunned down as he walked toward his car outside his Brooklyn home, bringing a violent end to the life of a man who had spent years moving between two worlds, one inside organized crime and the other in secret cooperation with the Federal Bureau of Investigation. Johnson was not a minor informant. According to court records and testimony that later emerged, he had provided information to the FBI for roughly nineteen years, beginning in 1966 and continuing until 1985. The FBI reportedly knew him by the code name “Wahoo,” and the information he supplied reached into the inner workings of the Gambino crime family and the activities of John Gotti and other organized-crime figures. Yet Johnson’s position inside the mob made his cooperation especially valuable. He was close enough to men at the center of the organization to hear things that investigators desperately wanted to know, while his reputation as a tough and dependable street figure helped keep suspicion away from him for years. Johnson’s relationship with Gotti made the situation even more remarkable. The two men were associates, and Johnson was considered part of Gotti’s circle. At the same time, Johnson was secretly passing information to the FBI. He had become an informant after entering prison in the 1960s and reportedly becoming bitter when the mob failed to provide the financial support for his wife and children that he believed had been promised. From that point forward, Johnson maintained a dangerous secret life, remaining close to people who trusted him while quietly supplying information to federal investigators. His information reportedly touched on narcotics activity and other crimes involving members of the Gambino organization. For years, Johnson managed to survive that contradiction. He was known on the street as Willie Boy, a physically imposing enforcer who had earned a reputation for violence, while to the FBI he was something entirely different: a source with access to the very people federal agents were trying to penetrate. The contradiction was almost impossible to sustain forever, however, and in 1985 the secret began to collapse.