“John Yoo — a well-known and, in some legal and political circles, infamous conservative lawyer — will assist a Justice Department investigation that has theorized a yearslong conspiracy against President Donald Trump and is looking at several former high-ranking federal officials,” CNN reports.“Yoo, now a law professor at the University of California, Berkeley, was the head of the Justice Department’s Office of Legal Counsel under President George W. Bush during September 11, 2001, and is most known for authoring the ‘torture memos’ used for detainees after the attacks. He is also a national security specialist with experience on the law around presidential power and a proponent of expanding authority for the executive branch.”