John Edgar Hoover was an American icon who revolutionised crime-fighting and transformed the FBI into the powerhouse it is today. But do his problematic views, enormous vanity and controlling approach make him evil… or genius? Laura Smyth, Josh Jones and Johnny Cochrane expose the king of the FBI.

Producer: Sasha Bobak
Evil Genius with Russell Kane is a BBC Studios Production for BBC Radio 4 and BBC Sounds.