Three volunteer South Carolina prison employees will be the firing squad used to execute condemned killer Brad Sigmon on Friday.

South Carolina inmate Brad Sigmon has chosen to die by firing squad March 7, a first for the state after he raised doubts about its lethal injection protocol.

Condemned South Carolina inmate Brad Sigmon has chosen to die next month by a firing squad, a method of execution that has not been used in the U.S. in 15 years.

Brad Sigmon, the condemned South Carolina prisoner, opted for firing squad over the state’s primary method of electrocution or the more widely used practice of lethal injection. “He’s made the best choice that he can, but the fact that he had to make it at all is horrifying,” said Sigmon’s lawyer, Gerald “Bo” King.

COLUMBIA, S.C. (AP) — A South Carolina man who is scheduled to die next week by firing squad is again asking that his execution be postponed and prison officials release more information about the state’s lethal injection drug and procedures.

South Carolina is set to use a firing squad to execute Brad Sigmon, a rarely used killing method in the United States.

Brad Sigmon, set for execution by firing squad on March 7, seeks a delay, citing concerns over South Carolina’s lethal injection process. If carried out, it would be the first U.S. firing squad execution since 2010.

South Carolina is preparing this week to execute a man by firing squad, a capital punishment method that hasn’t been used in the U.S. in nearly 15 years.

It will be three people holding rifles about 15 feet (4.6 meters) away who will complete his punishment in what will be the United States’ first firing squad execution in 15 years