Greenberg Traurig on Monday announced it had hired away a U.S. Department of Justice lawyer who worked closely with Robert Mueller, in the latest addition to its growing white-collar defense and special investigations practice.

Kyle Freeny was one of the 19 prosecutors who worked with Mueller to investigate Russian meddling in the 2016 presidential election, as well as possible ties between Russian government officials and the Trump campaign. While on Mueller’s team, Freeny took leading roles in investigating bank fraud, money laundering and tax fraud.