The story

State and federal investigators said Tuesday that they spent the past two days gathering evidence in the last documented mass lynching in the United States: a grisly slaying of four people that has remained unsolved for more than six decades.

In a written statement, the FBI and the Georgia Bureau of Investigation said they collected several items on a property in rural Walton County, Georgia, that were taken in for further investigation.

On July 25, 1946, two black sharecropper couples were shot hundreds of times and the unborn baby of one of the women cut out with a knife at the Moore's Ford Bridge. One of the men had been accused of stabbing a white man 11 days earlier and was bailed out of jail by a former Ku Klux Klan member and known bootlegger who drove him, his wife, her brother and his wife to the bridge. Read full article »

CNN's Eliott C. McLaughlin contributed to this report.

All About Federal Bureau of InvestigationKu Klux Klan