Carofiglio, born 1961, is an anti-mafia prosecutor in the southern Italian city of Bari. He has been responsible for the area's most important indictments regarding organized crime, corruption and trading in human beings. 'Involuntary Witness' and 'A Walk in the Dark' both feature Guido Guerrieri, defence counsel of hopeless causes. These crime novels are the basis of a major television series in Italy and were top of the best seller lists for six and eight months respectively.