William McSwain, the former U.S. attorney for the Eastern District of Pennsylvania appointed by former President Donald Trump, stepped into his new role as a partner at Duane Morris, based in the firm’s Philadelphia office, on Monday.

McSwain served as a federal prosecutor from April 2018 until he stepped down as a formality to make way for the newly elected President Joe Biden’s pick Jan. 22. As a prosecutor, he was characterized by a tough-on-crime image, expressing vocal opposition to the nation’s first safe injection site in Philadelphia and to the city’s moratorium on public events. He also made it a priority to prosecute lawyers involved in criminal behavior during his tenure.