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.

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 case was closed in 2007 with authorities saying the suspects were dead; a state grand jury didn’t file any new charges.

Deborah Watts, a cousin of Till, said she was unaware the case had been reopened until contacted by The Associated Press on Wednesday.

The federal report, sent annually to lawmakers under a law that bears Till’s name, does not indicate what the new information might be, But it was issued in late March following the publication last year of “The Blood of Emmett Till,” a book that says a key figure in the case acknowledged lying about events preceding the slaying of the 14-year-old youth from Chicago.

The book, by Timothy B. Tyson, quotes a white woman, Carolyn Donham, as acknowledging during a 2008 interview that she wasn’t truthful when she testified that Till grabbed her, whistled and made sexual advances at a store in 1955.

Relatives of Till pushed Attorney General Jeff Sessions to reopen the case last year following publication of the book.

Donham, who turns 84 this month, lives in Raleigh, North Carolina. A man who came to the door at her residence declined to comment about the FBI reopening the investigation.

“We don’t want to talk to you,” the man said before going back inside.

Paula Johnson, co-director of an academic group that reviews unsolved civil rights slayings, said she can’t think of anything other than Tyson’s book that could have prompted the Justice Department to reopen the Till investigation.

“We’re happy to have that be the case so that ultimately or finally someone can be held responsible for his murder,” said Johnson, who leads the Cold Case Justice Initiative at Syracuse University.

The Justice Department declined to comment on the status of the probe.

Watts, Till’s cousin and co-founder of the Emmett Till Legacy Foundation, said it’s “wonderful” that the killing is getting another look, but didn’t want to discuss details.

“None of us wants to do anything that jeopardizes any investigation or impedes, but we are also very interested in justice being done,” she said.