Former Los Angeles police officer turned best- selling author Joseph Wambaugh, known for books such as "The Onion Field" and "The New Centurions," has died at the age of 88.

He wrote 'The Onion Field,' 'The New Centurions' and 'The Blue Knight' and created the realistic anthology series 'Police Story.'

Before the release of Joseph Wambaugh’s first novel, “The New Centurions,” he received an unusual offer from the star of the strait-laced TV police drama “Dragnet” to look over the pages.

In 1971, eleven years after joining the LAPD, Wambaugh saw his first novel, The New Centurions, published by Little, Brown and Co. The story of rookie LAPD cops in the early 1960s became his first bestseller and, the following year, the first movie based on his work. The film adaptation starred George C. Scott and Stacy Keach.

Unlike those on 'Dragnet' and other cop shows, Wambaugh's fictional officers were often compromised and deeply flawed characters

Joseph Wambaugh, who has died aged 88, was a former Los Angeles detective who in the 1970s became a bestselling author of grim and gritty books about the police such as The Onion Field (1973) and The Choirboys (1975);

Joseph Wambaugh, a former police officer who became an acclaimed bestselling author, introducing audiences to the gritty, stark realities faced by fellow street cops, died Friday. He was 88. The longtime San Diego resident died of esophageal cancer in his second home in Rancho Mirage,