Civil rights leader was urged to kill himself over ‘sexual orgies' with 'evil playmates' By Rosa Prince, New York 5:08PM GMT 12 Nov 2014 The graphic contents of an anonymous letter in which the Federal Bureau of Investigation called Martin Luther King a “filthy abnormal animal” have been made public for the first time. Written in 1964 by a deputy of the feared FBI chief J Edgar Hoover posing as…