Preview: The Gaskos

|For 16 years, one of the FBI's most wanted men, Boston gangster Whitey Bulger and his girlfriend, managed to elude a worldwide manhunt by living a quiet life in Santa Monica, Calif., as "Charley and Carol Gasko." Federal law enforcement trackers tell Steve Kroft how they were finally able to locate and arrest the wily, murderous criminal who was also an FBI informant. Watch Kroft's report on Sunday, Nov. 24 at 7 p.m. ET/PT.

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