Robert Capers, the former Eastern District of New York U.S. attorney who prosecuted pharmaceutical executive Martin Shkreli, FIFA soccer officials and major financial institutions, has joined his first law firm, Arent Fox, the firm announced Monday.

Capers, who was a career prosecutor for more than 20 years, will co-lead Arent Fox's government enforcement and white-collar practice.

“This is my first foray into private practice,” said Capers, 47, who started Monday at the firm as a partner.