AUGUSTA — A grand jury on Friday indicted 19-year-old Andrew Balcer on murder charges related to the brutal killings of his parents and a family dog during the early morning of Halloween 2016. The indictment comes less than two months after a judge decided that Balcer – who was a month shy of turning 18 years old when the killings occurred in the family home in Winthrop – would be treated as an adult in the criminal justice system. This was the first grand jury to sit in Kennebec County after that decision was made.