A white man who killed a black woman in 1978 was executed by injection Friday, four months after his cousin - who carved "KKK" on the woman's body - was put to death for the same slaying.

John Plath, 43, was the 15th person executed in South Carolina since the death penalty was reinstated in 1977.Betty Gardner, 33, was hitchhiking when she was picked up by Plath; his cousin John Arnold, who was executed in March; an adult woman; and a 12-year-old girl.