INTERNATIONAL: 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 filed Friday.

Richard Bernard Moore, 57, is the also first state 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 country to die by firing squad in nearly half a century.

As his lawyers continue to mount court challenges, they’re also preparing a case for clemency. Among his supporters is the former director of South Carolina’s Department of Corrections, Jon Ozmint, who asserts Moore is a reformed man who deserves life without parole instead of death.

“Circumstances took place inside the store that certainly made him guilty of killing another man, but in most counties in this state, I doubt you could even find a jury to recommend the death penalty on those facts,” said Ozmint, a self-described supporter of the death penalty who helmed the department between 2003 and 2012 — one of the death chamber’s busier periods.

Only three executions in the United States have been carried out by firing squad since 1976, according to the Washington-based nonprofit Death Penalty Information Center. Moore’s would mark the first since Ronnie Lee Gardner’s 2010 execution by a five-person firing squad in Utah.