Sudbury teenager a 'good guy except for when he drinks' 

A Sudbury teen who choked his girlfriend as passing motorists watched, then assaulted a woman on a bicycle moments later, has been given a conditional discharge.
  Ayden Knoll, 19, pleaded guilty in Sudbury court to assault by choking and assault. Despite the discharge, he will be on a short leash thanks to a three-year probation order that includes a condition that he takes treatment for alcohol abuse, domestic violence, grief/bereavement, and anger management.
  Knoll will not have a