In July 1998, Roy Glenn Jr. was found shot to death at his home in Jackson County's Orange Grove Community.
Sheriff Mike Byrd inherited the case more than a year later.
"We had general idea who the person was that committed this," Sheriff Byrd said.
For almost a decade, authorities say they've been working to arrest two people - Karrie Glenn, the victim's wife, and her friend David Stokes. Sheriff Byrd says the two robbed and killed Roy Glenn.
"She conspired with him to have her husband killed. Robbery was one motive, and the other motive was a relationship she had with him. We believe drugs may have been involved."
Investigator Ken McClenic says shortly after the murder, David Stokes moved to South Carolina, and there just wasn't enough evidence to make the arrests.
"We had to wait, but we never ruled them out," McClenic said.
Last week the department got the tip they needed, when several people came forward with information to crack the case.
While the Sheriff's Department would not to reveal that information, by Monday David Stokes was arrested and brought back to Jackson County. Tuesday night, Karrie Glenn was also behind bars.
"They are both charged with capital murder," Byrd said.
Both are in the Jackson County Jail. Glenn and Stokes will have their initial court hearings Thursday morning.