. >> maurice: gladys larke was in her living room and taylors, south carolina.david, was in the kitchen. >> john: brad sigmon walked in, moved methodically back and forth between those rooms and repeatedly beat the larkes with a baseball bat until they died. >> maurice: angry that their daughter had broken up with him, sigmon showed her parents no mercy. >> john: and none was showed him. tonight, 24 years after the murders, south carolina put sigmon to death in the first execution in the united states by firing squad in 15 years. meg oliver is at the prison in columbia. meg? >> reporter: with a hood over his head and a target over his heart, a firing squad executed brad sigmon. he was pronounced dead at 6:08, four years after the south carolina state legislature approved the option for death row inmates. in this room, behind a century-old electric chair, 67-year-old brad sigmon was strapped down here. hidden behind a wall 15 feet away, three corrections employees fired live rounds at him through a small rectangular hole, a method he chose instead of lethal injec