Michael Cohen announced a shift in his legal team Monday, ahead of a possible appearance before a congressional committee and ongoing cooperation with prosecutors from the U.S. Attorney’s Office for the Southern District of New York and the office of Special Counsel Robert Mueller III.

Michael Monico and Barry Spevack, the name attorneys at Chicago’s Monico & Spevack, have been brought on to represent Cohen. They replace Petrillo Guy & Boxer name attorney Guy Petrillo, who guided Cohen, President Donald Trump’s former personal attorney, through plea processes with the New York and Washington, D.C., prosecutors’ offices.