SAVANNAH — A man who pleaded guilty to killing a woman on a Georgia Army post was sentenced Thursday to nearly 60 years in federal prison.

A U.S. District Court judge sentenced Stafon Jamar Davis of Savannah in the July 2018 slaying of Abree Boykin.

Authorities said the 24-year-old woman was fatally shot as she slept in her apartment at Fort Stewart. Boykin’s husband, a soldier stationed at the Army post, was deployed to South Korea when she was killed.

Davis had known Boykin since they were children, according to a news release from the U.S. Attorney's Office for the Southern District of Georgia. Davis later confessed to shooting her and then stealing her car, which investigators found had been abandoned and set on fire in South Carolina.

The case was prosecuted in federal court because Boykin was slain on a U.S. military installation. Davis, who had previously served time in federal prison for armed robbery, pleaded guilty to charges of premeditated murder and illegal possession of a firearm.