Ed Mullins, president of a union representing New York Police Department sergeants, stepped down after the FBI raided the union’s headquarters and his home without giving specific reasons.

In a letter to its membership late Tuesday, Oct. 5, NYPD Sergeants Benevolent Association’s board said Mullins resigned from his post at their request, NY Daily News reported.

“The nature and scope of this criminal investigation has yet to be determined,” the SBA board wrote in their letter. “However, it is clear that President Mullins is apparently the target of the federal investigation. We have no reason to believe that any other member of the SBA is involved or targeted in this matter.”

The SBA made the request after federal investigators descended on its Manhattan headquarters and Mullins’ home in Long Island on Tuesday morning.

The FBI agents were seen carrying boxes after raiding the Sergeants Benevolent Association headquarters, according to NY Daily News, which reported one of the boxes appeared to hold a hard drive, and another was filled with what looked like electronic equipment.

Details of the investigation remained under wraps, an FBI spokeswoman told the news outlet, adding that her agency was “carrying out a law enforcement action in connection with an ongoing investigation” into the SBA.

Mullins has served as head of the NYPD SBA, representing some 13,000 current and former New York City Police Sergeants, since 2002.

As a social media firebrand and staunch supporter of former President Donald Trump, Mullins was known for his heated rhetoric against New York City Mayor Bill de Blasio and other city officials. He once blasted de Blasio and a host of City and State officials for anti-police statements.

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