DiCaprio will be paying the FBI informant Jack Van Laningham, who is said to have been part of an undercover operation to become a confidant of Carlos Marcello, a Mafia godfather that oversaw organized crime in Louisiana and Texas for decades. The book states that Marcello ordered the assassination of Kennedy, and contains declassified information about Marcello's confession.
The film will be made through Warner Bros., who released the 1991 film, "JFK". It is scheduled for a 2013 release, to coincide with the 50th anniversary of the President's assassination.
