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The New York City Department of Investigation ("DOI") is one of the oldest law-enforcement agencies in the country and an international leader in the effort to combat corruption in public institutions. It serves the Mayor and the people of New York City as an independent and nonpartisan watchdog for the City government.

What’s New:
DOI Investigation Into Delay of Ambulance Dispatch to Queens Fatal Fire in April 2014 Reveals Significant Ongoing Flaws in Overall System. Click here to read more
Fraud Hot Line
Report Corruption
Commissioner Mark G. Peters
Significant Cases