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 chose bullets over lethal injection or the electric chair, "which would burn and cook him alive," his attorney said.

Death row inmate Brad Sigmon has chosen to die by firing squad after being convicted for the deaths of his ex-girlfriend's parents.

Brad Sigmon, who used a baseball bat to kill his ex-girlfriend's parents at their home in Greenville County, California, didn't pick the electric chair because it would "burn and cook him alive"