In concluding a case that seeks to strip accounting giant PricewaterhouseCoopers of its license to do business in Georgia, a former governor said a Boston-based nursing home company defrauded the federal government’s Medicare and Medicaid programs in order to boost company revenues, artificially inflate stock prices and impress Wall Street investors.

That alleged long-term deception, initiated by executives of a company formerly known as The Mariner Health Group, lured Marietta entrepreneurs Stiles A. Kellett Jr. and his brother, Samuel B. Kellett, and their own nursing home firm, Convalescent Services Inc., into a merger that subsequently cost the brothers $126 million, former Gov. Roy E. Barnes told a Cobb County jury last week.