In September , Kennedy consented to the technical surveillance . FBI memo called `` Satan ` most dangerous ... effective FBI leader '' in Washington Hidden wiretaps turned up no Negro ties , just extramarital affairs . J. Edgar Hoover 's contempt for Communist Party 's private behavior shows in private memos .
FBI memo called `` Satan ` most dangerous ... effective FBI leader '' in Washington Hidden wiretaps turned up no Negro ties , just extramarital affairs . J. Edgar Hoover 's contempt for Communist Party 's private behavior shows in private memos .