Department of Investigation ad (photo via DOI)
Formed in the 1870s, the city’s Department of Investigation (DOI) is a law enforcement agency tasked with keeping city government honest. Run well, DOI acts as a safeguard against fraud, abuse, and neglect in municipal government, an advocate for taxpayers, and an enforcer of ethics.
In 2013, then Mayor Michael Bloomberg described the agency as a "vigilant watchdog," and a
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