FBI’s Psychological Warfare Tactics: “Messing with the Mob’s Mind”

"In the Monday editions of the Chicago Sun-Times, we tell the story of how the FBI created such a paranoid atmosphere in the Chicago Outfit, many mobsters, including Frank Calabrese Sr., came to believe that fellow Outfit member and reputed killer James DiForti was a rat. ... "

http://blogs.suntimes.com/mob/2007/10/messing_with_the_mobs_mind.html