In 1970,
New York City organized the
Knapp Commission to hold hearings on the extent of corruption in the
city's police department. Police officer
Frank Serpico's startling testimony against fellow officers not only revealed
systemic corruption but highlighted a longstanding obstacle to investigating these abuses: the fraternal understanding among police officers known variously as "the Code of Silence" and "the Blue Curtain" under which officers regard testimony against a fellow officer as betrayal. One New York City police officer said, "If a cop decided to tell on me, his career's ruined... He's going to be labeled as a rat." The following year saw the founding of the
Civilian Complaint Review Board, an all-civilian board tasked with investigating civil complaints about alleged misconduct on the part of the
New York City Police Department. After that, the
International Association of Chiefs of Police made a code of police conduct publication and rigorously trained police officers. In 1991,
Rodney King was brutally beaten by multiple police officers of the
Los Angeles Police Department. The officers involved were expected to have been following the "blue code". They claimed that the beating was lawful, but it was not until a videotape of the incident was released when it was confirmed that the officers had collectively fabricated their stories. In the later 1990s, the
FBI arrested 42 officers from five law enforcement agencies in 1998 on charges of conspiracy to distribute cocaine. In a 1998, report to U.S. Congressman
Charles B. Rangel, the federal
General Accounting Office found evidence of growing police involvement in drug sales, theft of drugs and money from drug dealers, and perjured testimony about illegal searches. ==History==