COLUMBIA, S.C. — South Carolina has scheduled its first execution in more than six years.

The State Department of Corrections said Friday it had received an order from the state Supreme Court setting a Dec. 1 execution date for 52-year-old Bobby Wayne Stone.

Stone has been on South Carolina’s death row for 20 years, convicted of murder in the 1996 slaying of Sumter County sheriff’s Sgt. Charlie Kubala.

Stone has acknowledged he shot Kubala as the officer responded to a call in February 1996, but said the shooting was accidental.

South Carolina uses lethal injection as its execution method, though inmates can opt for electrocution.

The state’s injection protocol requires three drugs. Other states have gone to using a single drug.

South Carolina hasn’t carried out an execution since 2011.