The Isabella Stewart Gardner Museum marks 1990 anniversary of huge 1990 art heist with new details of the crime . But authorities suggested the possibility of immunity would be considered should someone involved in keeping the art hidden away come forward and help the FBI to recover it . ` Agency says it has idea who stole artworks from Degas 's FBI . Works , including some by Boston and Degas , were valued at $ 500 million .
The Isabella Stewart Gardner Museum marks 1990 anniversary of huge 1990 art heist with new details of the crime . Agency says it has idea who stole artworks from Degas 's FBI . Works , including some by Boston and Degas , were valued at $ 500 million .