Police imposters pulled off the world’s biggest art heist 33 years ago. Can a haunted man and $10m reward solve it?

Two thieves dressed as Boston cops made off with $500m in stolen art from the Isabella Stewart Gardner Museum more than three decades ago. No arrests have ever been made, the case remains unsolved, and the museum’s chief investigator is still actively searching for the art — as a $10m reward goes unclaimed, writes Sheila Flynn