Did a suspect in a famous art heist take his secrets to the grave? Robert Gentile died on September 17th at the age of 85 according to his attorney. Authorities have long suspected him of possessing or knowing the whereabouts of some precious stolen artwork. The Netflix docuseries “This is a Robbery: The World’s Biggest Art Heist” chronicles the 1990 theft of $500 Million worth of art from the Isabella Stewart Gardner Museum in Boston. Inside Edition Digital’s Mara Montalbano has more.