A South Carolina prisoner scheduled to be the first man executed in the state in more than a decade has decided to die by firing squad rather than in the electric chair later this month, according to court documents.
Richard Bernard Moore, 57, is the also first South Carolina prisoner to face the choice of execution methods after a law went into effect last year making electrocution the default and giving inmates the option to face three prison workers with rifles instead.
Moore has spent more than two decades on death row after being convicted of the 1999 killing of convenience store clerk James Mahoney in Spartanburg.
If executed as scheduled on April 29, he would be the first person put to death in the state since 2011 and the fourth in the United States to die by firing squad in nearly half a century.
Only three executions in the US have been carried out by firing squad since 1976, according to the Washington-based nonprofit Death Penalty Information Centre.
Moore's would mark the first since Ronnie Lee Gardner's 2010 execution by a five-person firing squad in Utah.
South Carolina is one of eight states that still use the electric chair and one of four to allow a firing squad, according to the centre.
In a written statement, Moore said he didn't concede that either method was legal or constitutional but he more strongly opposed death by electrocution and only chose the firing squad because he was required to make a choice.
The state's new law was prompted by the decade-long break in executions, which corrections officials attributed to an inability to procure the drugs needed to carry out lethal injections.
Moore's lawyers have asked the state Supreme Court to delay his death while another court determines if either available method is cruel and unusual punishment.
The lawyers argue prisons officials aren't trying hard enough to get the lethal injection drugs, instead forcing prisoners to choose between two more barbaric methods.
His lawyers are also asking the state Supreme Court to delay the execution so the US Supreme Court can review whether his death sentence was a disproportionate punishment compared with similar crimes.
The state justices denied a similar appeal last week.
South Carolina's corrections agency said last month that it finished developing protocols for firing squad executions and completed $US53,600 ($72,480) in renovations on the death chamber in Columbia, installing a metal chair with restraints facing a wall with a rectangular opening 4.6 metres away.
In the case of a firing squad execution, three volunteer prison workers will train their rifles on the condemned prisoner's heart.
Supporters say Moore's punishment is disproportionate
Moore is one of 35 men on South Carolina's death row.
The state last scheduled an execution for Moore in 2020, but it was delayed after prison officials said they couldn't obtain lethal injection drugs.
Corrections Department Director Bryan Stirling reiterated in an affidavit last week that the agency still couldn't obtain the drugs because manufacturers and compounding pharmacies contacted by the state refused to help.
During Moore's 2001 trial, prosecutors said Moore entered the store looking for money to support his cocaine habit and got into a dispute with Mahoney, who drew a pistol that Moore wrestled away from him.
Mr Mahoney pulled a second gun, and a gunfight ensued.
Mr Mahoney shot Moore in the arm, and Moore shot Mr Mahoney in the chest.
Prosecutors said Moore left a trail of blood through the store as he looked for cash, stepping twice over Mr Mahoney.
At the time, Moore claimed that he acted in self-defence after Mr Mahoney drew the first gun.
Moore's supporters have argued that his crime doesn't rise to the level of a death penalty offence.
His appeal lawyers have said that because Moore didn't bring a gun into store, he couldn't have intended to kill someone when he walked in.
AP
