A humvee pulling a horse trailer plowed into two pedestrians in Huntington Sunday afternoon, killing a teen. Betty says she watched in horror as the humvee veered off Park Avenue, knocked down a street sign and hit two teenage sisters. Khan says the driver was shocked by the accident. She says he stopped and went to check on the girls, then he collapsed. Police say 15-year-old Blanca Benitez died at the scene and her 17-year-old sister Ana suffered head injuries. She is being treated at Huntington Hospital. Investigators say the humvee driver fell asleep at the wheel. According to police the driver has a history of sleep disorders. He had his family in the vehicle and was on his way home from a horse show. Police have not charged the driver.