The investigation into the Bangor School District’s assistant superintendent has cost the city nearly $58,000, so far, in wages and legal fees.Robert Lucy has resigned from the job. Superintendent Betsy Webb made the announcement Wednesday night and says Lucy’s last day is March 29th.He was put on administrative leave at the end of September after a Department of Education investigation report that stated, while Principal at Orono Middle School, Lucy asked teachers to let some students “re-visit” their state exams.According to the report, some students did look at their tests again, and re-worked answers, which is not allowed. The Superintendent says the district’s investigation is complete but the results are confidential and will not be publicly released. She says Lucy went on medical leave last month to take care of a family member and by the time he leaves the district, he’ll have been paid $50,865. Webb says the most recent price tag for the cost of the investigation is about $6,700, but that’s not a final bill.