Today is my last day as commissioner of the Department of Investigation (DOI), New York City’s independent inspector general. DOI’s mission is to investigate corruption, fraud and waste in city government and to strengthen policies and procedures that promote integrity, efficiency and transparency. The agency’s independent and apolitical work can and should be a key component of Mayor Mamdani’s ambitious plan to “transform and reinvent” government so that it can improve New Yorkers’ lives.

Why? Because robust oversight keeps government honest and effective.

After the past four years, there is no question that the extraordinary team at DOI has the capacity, skill and courage to follow the facts wherever they lead — including to the sitting mayor and his or her senior advisors — and to work closely with prosecutors to ensure that our investigations result in criminal charges that make the public aware of misconduct and hold wrongdoers accountable.

DOI’s critical role in bringing the first charges in modern history against a........

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