A former mailman was sentenced to one day in prison in connection with stealing packages and prescription medication from customers on his postal route.Michael Vernon, a 53-year-old Somerville resident, was arrested in September 2025 and pleaded guilty in December to one count of theft of mail by a postal officer. On Friday, a judge sentenced him to time served, which was one day, and a year of supervised release, according to the U.S. Attorney’…