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 Keith Sigmon is set to be executed by firing squad on March 7 for the 2001 beating deaths of his ex-girlfriend's parents, David and Gladys Larke.

South Carolina is now on track to carry out its first-ever execution by firing squad next month. Death row inmate Brad Sigmon, 67, chose the option over electrocution and lethal injection, reports the New York Times.