The largest government relations law firm in Washington, D.C., has expanded its government relations expertise with a new hire from the U.S. Department of Justice.

Raphael Prober, who spent almost 18 months as an associate deputy attorney general at Main Justice, will return to Akin Gump Strauss Hauer & feld to serve as co-leader of the firm’s congressional investigations practice. He worked at Akin Gump for more than seven years, making partner in 2013, before entering public service in early 2015.