Conversation so far:
Where did Robert Mueller go to school?
Robert Mueller studied at Princeton University, New York University, and University of Virginia
Where did Robert Mueller work at?
After receiving his Juris Doctor in 1973 from the University of Virginia School of Law, Robert Mueller worked as a litigator at the firm Pillsbury, Madison and Sutro
What did Robert Mueller do next for work?
Robert Mueller then served for 12 years in United States Attorney offices.
What office did Robert Mueller work at?
Robert Mueller first worked in the office of the U.S. Attorney for the Northern District of California in San Francisco, where he rose to be chief of the criminal division
Where did Robert Mueller go next after  heworked in the office of the U.S. Attorney for the Northern District of California in San Francisco, where he rose to be chief of the criminal division?
Robert Mueller moved to Boston to work in the office of the U.S. Attorney for Massachusetts as an Assistant United States Attorney
What type of work did Robert Mueller do as an Attorney for the Northern District of California in San Francisco?
Robert Mueller investigated and prosecuted major financial fraud, terrorism and public corruption cases, as well as narcotics conspiracies and international money launderers.
Did Robert Mueller later get another job after he investigated and prosecuted major financial fraud, terrorism and public corruption cases, as well as narcotics conspiracies and international money launderers?
After serving as a partner at the Boston law firm of Hill and Barlow, Robert Mueller returned to government service.
What type of government work did Robert Mueller do?
In 1989, Robert Mueller served in the United States Department of Justice as an assistant to Attorney General Dick Thornburgh and as acting Deputy Attorney General.
Did Robert Mueller serve in any other positions besides assistant to Attorney General Dick Thornburgh and as acting Deputy Attorney General?
In 1990, Robert Mueller became the United States Assistant Attorney General in charge of the United States Department of Justice Criminal Division.

Question: What notable cases did he work?
Self-contained rewrite: What notable cases did Robert Mueller work as United States Assistant Attorney General in charge of the United States Department of Justice Criminal Division?