Birmingham, Ala. • A year after a book on the brutal slaying of black teen Emmett Till revealed that a key figure in the case acknowledged lying, the federal government has reopened its investigation of the 1955 crime that helped build momentum for the civil rights movement. A federal report sent annually to lawmakers under a law that bears Till’s name said the Justice Department is reinvestigating Till’s slaying in Mississippi after receiving “new information.” The report issued in late March doesn’t indicate what that information might be. But the 2017 book “The Blood of Emmett Till” by Timothy B. Tyson quotes a white woman, Carolyn Donham, as saying during a 2008 interview that she wasn’t
