Elizabeth Bentley

Bentley became widely known after testifying as a prosecution witness in a number of trials and before the United States Congress' House Un-American Activities Committee (HUAC). Bentley was subsequently paid by the FBI for both her assistance in counterespionage investigations and her testimony before Congressional subcommittees. Bentley exposed two spy networks and ultimately accused more than 80 American citizens of both treason and espionage for a foreign power. Provided by Wikipedia