''Blue on Blue: An Insider's Story of Good Cops Catching Bad Cops'' is a 2017

nonfiction Non-fiction (or nonfiction) is any document or media content that attempts, in good faith, to convey information only about the real world, rather than being grounded in imagination. Non-fiction typically aims to present topics objectively ...

book by Charles Campisi and journalist Gordon Dillow. Campisi, the primary author of ''Blue on Blue'', was the head of the

New York Police Department The City of New York Police Department, also referred to as New York City Police Department (NYPD), is the primary law enforcement agency within New York City. Established on May 23, 1845, the NYPD is the largest, and one of the oldest, munic ...

Internal Affairs Bureau The City of New York Police Department, also referred to as New York City Police Department (NYPD), is the primary law enforcement agency within New York City. Established on May 23, 1845, the NYPD is the largest, and one of the oldest, munic ...

. With Dillow, he describes his police career, and various cases of the Bureau investigating police officers who stole drugs, employed excessive force, or otherwise violated laws or regulations. The

Abner Louima Abner Louima (born November 24, 1966) is a Haitian American man who, in 1997, was physically attacked, brutalized, and raped by officers of the New York City Police Department (NYPD) after he was arrested outside a Brooklyn nightclub. His injur ...

case and the

shooting of Amadou Diallo In the early hours of February 4, 1999, an unarmed 23-year-old Guinean student named Amadou Diallo (born September 2, 1975) was fired upon with 41 rounds and shot a total of 19 times by four New York City Police Department plainclothes office ...

are covered, and the "

blue wall of silence The blue wall of silence, also blue code and blue shield, are terms used to denote an informal code of silence among police officers in the United States not to report on a colleague's errors, misconduct, or crimes, especially as related to ...

" phenomena is discussed. Campisi and Dillow also describe the activities of the Police Impersonation Group, the Bureau's section devoted to catching people impersonating New York City police officers. The authors outline how miscreants obtain fake copies of police badges and even full uniforms and use them against unwitting victims, and sometimes whole communities (typically vulnerable immigrant communities), for crimes including rape and extortion. The book ends with a commentary on the current state of the New York City police, where the authors express concern that the Department is vulnerable to infiltration by sympathizers or even sleeper agents of terrorist organizations such as

ISIS Isis was a major goddess in ancient Egyptian religion whose worship spread throughout the Greco-Roman world. Isis was first mentioned in the Old Kingdom () as one of the main characters of the Osiris myth, in which she resurrects her sla ...

al-Qaeda , image = Flag of Jihad.svg , caption = Jihadist flag, Flag used by various al-Qaeda factions , founder = Osama bin Laden{{Assassinated, Killing of Osama bin Laden , leaders = {{Plainlist, * Osama bin Lad ...

. The book was reviewed by ''

The Wall Street Journal ''The Wall Street Journal'' (''WSJ''), also referred to simply as the ''Journal,'' is an American newspaper based in New York City. The newspaper provides extensive coverage of news, especially business and finance. It operates on a subscriptio ...

'', who wrote "Mr. Campisi... tells his cop stories with verve, intriguing detail and a generous heart", and it received generally favorable reviews in some other notable websites and publications.

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