By Harriet McLeod CHARLESTON, S.C. (Reuters) - A first grader who was shot and wounded by a 14-year-old boy accused of killing his father before he opened fire outside a South Carolina elementary school is "fighting for his life," a fire chief and the boy's family said on Thursday. Jacob Hall, 6, was struck in the leg on Wednesday afternoon during a shooting spree that also wounded another boy and a first-grade teacher at Townville Elementary School, about 100 miles (160 km) northeast of Atlanta. Police said the teenager crashed a pickup truck into a fence around the rural school's playground after he fatally shot his father, Jeffrey DeWitt Osborne, 47, at their home about 2 miles (3 km) away.