NPR has more:
Andrew Weissmann, the architect of the case against former Trump campaign chairman Paul Manafort, will study and teach at New York University and work on a variety of public service projects, including his longstanding interest in preventing wrongful convictions by shoring up forensic science standards used in courts, the sources added.
The departure is the strongest sign yet that Mueller and his team have all but concluded their work.
His leaving will follow the departure of the senior-most FBI agent working on the Mueller probe, who has taken his own next step. Special Agent in Charge David Archey started a new job on March 4 as head of the FBI's office in Richmond, Va.
Earlier this month, another special counsel prosecutor, Brandon Van Grack, moved on to lead a Justice Department effort to enforce compliance with the Foreign Agents Registration Act, a law that has become the subject of intense interest following charges against Manafort, his right-hand-man Richard Gates, and former Trump national security adviser Michael Flynn.