EASTON (WBSM) — A second Brockton teenager has been arrested in connection with the shooting of a teen girl in Easton earlier this month. Easton Police Chief Keith Boone announced today that Xavion Barnes, 19, was arrested and charged with accessory after the fact regarding the January 14 incident at the Avalon apartment complex in Easton in which a 16-year-old girl was shot in the face…