Three high-ranking NYPD officials and a Brooklyn businessman were arrested Monday morning, DNAinfo reports, in connection with the federal municipal corruption investigation, which has ranged from the police department to Mayor Bill de Blasio’s campaign fundraising.

Norman Seabrook, the head of the influential Correction Officers’ Benevolent Association union, was arrested at his home this morning as part of the federal corruption investigation into the New York City government. According to U.S. Attorney Preet Bharara, Seabrook’s crimes included taking five-figure kickback payments inside designer handbags.