A former caregiver for an elderly Vermont couple has been accused of defrauding them by using their credit card and withdrawing from their investment account. Jamie Gene Thompson pleaded not guilty in federal court in Brattleboro Thursday. He was indicted by a grand jury in February. Thompson became a live-in care provider for a couple in Charlotte in 2010. He provided medical and physical assistance and transportation. He also handled some of the couple’s finances. The indictment said that between September and October 2012, Thompson defrauded the couple by using their credit card to make about $9,000 in unauthorized purchases.