A 29-year-old North Carolina man will spend the rest of his life in prison for the 2006 robbery and murder of a former Florida Keys couple, according to the Cumberland County, N.C., District Attorney's Office.

A 12-member jury on Friday sentenced Anthony Tyrone McMillan to life in prison without parole -- plus an additional term of between 15 years and 18 years, nine months -- for the robbery and shooting deaths of Tammy Rosario and Mark Robinson, according to prosecutors.

In a Dec. 8 trial, the same jurors convicted McMillan of first-degree and second-degree murder, respectively, for the deaths of Rosario, 29, and Robinson, 49. They also found him guilty of robbery with a dangerous weapon.

A second suspect, Richard Bernard Gill Jr. of Hope Mills, N.C., also faces two counts of first-degree murder in the case. His trial is pending, according to Cumberland County prosecutors.

McMillan shot Rosario, a former dancer at a Key West club, and Robinson, a former part-time Big Coppitt Key resident, at a Stedman, N.C., car wash supply warehouse owned and operated by Robinson. Employees of The Car Wash Express found the bodies on Aug. 15, 2006.

McMillan had used a handgun to rob the pair before fatally shooting them. McMillan apparently had been called to the business to sell Robinson and Rosario crack cocaine.

Jurors heard testimony for two days before returning a verdict around 4:30 p.m. Friday, according to the Fayetteville Observer.