Roy Marcus Cohn (; February 20, 1927 – August 2, 1986) was an American lawyer best known for being Senator Joseph McCarthy's chief counsel during the Army–McCarthy hearings in 1954, for assisting with McCarthy's investigations of suspected communists, as a top political fixer, and for being Donald Trump's personal lawyer.Born in New York City and educated at Columbia University, Cohn rose to prominence as a U.S.
Department of Justice prosecutor at the espionage trial of Julius and Ethel Rosenberg, which concluded with the Rosenbergs' executions in 1953.
As McCarthy's chief counsel, Cohn came to be closely associated with McCarthyism and its downfall.
He also represented Donald Trump during his early business career.
In 1986, Cohn was disbarred from the Appellate Division of the New York State Supreme Court for unethical conduct after attempting to defraud a dying client by forcing the client to sign a will amendment leaving him his fortune.
and died five weeks later from AIDS-related complications.