Two gunmen killed a teenage football player and injured three of his teammates in an ambush-style attack outside of a Pennsylvania high school on Tuesday afternoon, police said. The violence erupted outside the Roxborough High School in Philadelphia just after 4:40 p.m. as the boys were leaving a football scrimmage against two other schools, according to police. The gunmen opened fire from a light green Ford Explorer, killing a 14-year-old boy and striking two other teenage boys. The murdered teenager was shot once in the left side of his chest. He was pronounced dead less than 30 minutes after the...