Tom Donlon, the former interim police commissioner, is escalating his efforts to bring attention to claims of corruption and misconduct at the police department.

On Tuesday, he referred the mayor and other former top police brass for criminal investigation to the U.S. Department of Justice.

Donlon is demanding that federal action be taken to “dismantle a criminal conspiracy inside the NYPD and restore integrity to law enforcement in New York City,” according to a statement.

The referral comes just weeks after Donlon filed a $10 million lawsuit against the mayor and a former police official claiming they tried to defame his character following allegations of corruption at City Hall and the NYPD.

Earlier this year, Donlon filed a civil lawsuit claiming the police department was run a

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