Michael Corbitt, 60, a former suburban police chief who wrote a book about his connections to organized crime, died of lung cancer July 27 at his home in Tampa.

Mr. Corbitt served as police chief of Willow Springs, Ill., a suburb of Chicago. He was convicted of conspiracy in 1989 but was released from prison in 1998 after helping the FBI solve several mob crimes.

His book, "Double Deal: The Inside Story of Murder, Unbridled Corruption, and the Cop Who Was a Mobster," was released in 2003. He wrote the book, which details the inner workings of organized crime in Chicago, with writer Sam Giancana, nephew of the mob boss of the same name who helped start Mr. Corbitt's criminal career.

In his book, Mr. Corbitt said his mob involvement started as a teenager, and his first job in law enforcement came when mob boss Sam Giancana helped him get a job as a police officer in Willow Springs.

Mr. Corbitt was appointed police chief in 1973. He left the position in 1982, around the time Dianne Masters, the wife of a mob attorney, disappeared. Her body was found nine months later in the trunk of a Cadillac in a canal in Willow Springs.

Mr. Corbitt and two others, including the victim's husband, were indicted in 1988 for their involvement in the slaying. All were convicted and sentenced to prison.

Sam Giancana, the author, said Mr. Corbitt began working with the FBI while in prison because he faced more racketeering charges and because mob associates threatened to kill one of his sons. For his cooperation, Mr. Corbitt was released from prison two years early.