After 52 years, Jim Hood says they’ve done all they can do. Mississippi’s attorney general says the investigation into the 1964 murders of three civil rights workers in Neshoba County is being officially closed now. It was a crime that was given the code name “Mississippi Burning.” Seven men were tried and convicted of federal civil rights violations in the case back in 1967 and an eighth man pleaded guilty. And 38 years later, Edgar Ray Killen was convicted on state manslaughter charges. Two other men believed to have been involved in the crime are still alive but Hood says nobody is willing or able to testify against them. He says if new information comes forward, the case could be reopened.