The Justice Department told Congress in a report in March it is reinvestigating Till's slaying in Money, Mississippi, in 1955 after receiving "new information."

The federal government has reopened its investigation into the slaying of Emmett Till, the black teenager whose brutal killing in Mississippi shocked the world and helped inspire the civil rights movement more than 60 years ago. 

Bill Cosby's wife called Thursday for a criminal investigation into the suburban Philadelphia prosecutor behind his sexual assault conviction, saying the case that could put the 80-year-old comedian in prison for the rest of his life was "mob justice, not real justice" and a "tragedy" that must be undone.