Swain was arrested in Jasper by agents from the FBI’s North Alabama Safe Streets Task Force on Dec. 6, 2013.
The victim of the alleged murder was Spc. John Joseph Beans Eubanks, stationed at Fort Stewart and found at a campground on the base. Murder occurring on a federal reservation or military base is a federal crime.
On Thursday, the grand jury returned a first-degree murder indictment that alleged Swain "willfully, deliberately, maliciously and with premeditation did unlawfully kill John Eubanks, by blunt force trauma to the head."
The indictment continued to say Swain "committed the offense after substantial planning and premeditation."
No trial date has been set in the case, and authorities stressed Swain is considered innocent until proven guilty. A grand jury indictment only indicates there is enough evidence to proceed to trial with the charges.
Swain has been in and out of police custody over the last few decades, charged with theft, burglary, domestic violence, aggravated battery and other charges in Florida.
The aggravated battery charge was reportedly tied to a case in Starke, Fla., in 1991, where Swain allegedly struck a man in the head with a pool cue and gave conflicting reports to police who investigated the case.