(CNN) In the early 1990s, Robert Mueller had just left one of the most powerful posts in America's criminal justice system: assistant attorney general for the criminal division of the Department of Justice. The stints were so short-lived because of a simple fact, according to Graff: Mueller couldn't stand defending those he felt were guilty. In the office, Mueller was known as a taskmaster who worked long hours and demanded detailed briefings from his staff. It's a hard-hitting style that Mudd is convinced Mueller has brought with him to the special counsel investigation. Now Mueller is overseeing the Justice Department's investigation into Russian meddling in the 2016 election.

Source: CNN February 24, 2018 02:48 UTC