The 59-year-old Richard Moore will be executed next month for the September 1999 shooting death of a store clerk in Spartanburg County, South Carolina.
A letter on Tuesday informed him that he had until October 18 to notify the state’s prison authorities if he would rather die by electric chair, lethal injection, or firing squad.
State legislation stipulates that he shall be electrocuted by default if he does not make a choice.
Moore is requesting that South Carolina Governor Henry McMaster, a Republican, substitute a life sentence without the possibility of parole for the November 1 execution and is appealing to the US Supreme Court to halt it.
In the modern era, no governor of South Carolina has ever commuted the death penalty.
James Mahoney, a shop assistant for the 59-year-old, entered the store in the hopes of robbing it and was shot and killed by the gunman.
Even though Mr. Mahoney was unarmed, Moore stole one of his pistols during their shootout. Moore survived with injuries, but he passed away from a bullet wound to the chest.
With no Black jurors on the panel, Moore is the only person on South Carolina’s death row who was found guilty.