Since 1990, the FBI has pursued the perpetrators of the Isabella Stewart Gardner Museum theft of over $500 million in art, including works by Rembrandt, Manet, Degas and Vermeer.  Twenty three years later, the bureau has announced that it knows who committed the thefts, but is witholding the information in hope of getting the works back.  The theft holds the disctinction of the largest property theft in U.S. history.
Read more at The Guardian
