The greatest art heist of all time remains unsolved, but in his new book Master Thieves: The Boston Gangsters Who Pulled Off the World’s Greatest Art Heist author StevenKurkjian reveals that a small-time gangster may have masterminded the audacious 1990 robbery of $500 million worth of masterworks from Boston’s Isabella Stewart Gardner Museum. Kurkjian was an investigative journalist for the Boston Globe for 40 years and for more than 20 years he has been writing about the art theft. Mindy Todd hosts this interview on The Point.