A 31-year-old Alton man is heading back to prison after violating the conditions of his supervised release. Sidney Dunton pleaded guilty to violating those conditions, and was sentenced today to 10 months in prison. Dunton is facing charges in state court for stealing more than $600 from an elderly blind woman.He was out on bail for that theft charge when he left Maine and headed to Minnesota without permission from his federal probation officer. He was arrested and brought back to Maine in May. Since then he’s been held without bail.Dunton has a long criminal history, dating back to 1998. In 2000, when he crashed his car into a Penobscot County Sheriff’s Department cruiser, the deputy thought he had a gun and Dunton was shot several times.