Mr Knox leaves the department as his actions against global banks for alleged manipulation of foreign currencies comes to a head. According to the New York Times, the criminal division of the Justice Department has had four leaders in the last 18 months, two of whom left to join Covington & Burling as partners. With banks under the spotlight, law firms are on the look-out for such hires and are willing to pay seven figure salaries to acquire them. Source: New York Times