A former Fayette County fire captain was sentenced to jail Friday for the shooting death of a junior firefighter. State police say the 16-year-old junior firefighter, Parker Hess, and 21-year-old fire captain George Matis, Jr., were working inside the small business office of the Republic Volunteer Fire Department last November when Matis’s gun discharged. The bullet hit Hess in the left cheek, killing him. The two men were helping to prepare for the township’s light-up night celebration. That celebration was abruptly canceled.