A Boston jury rendered a guilty verdict in the Clark Rockefeller trial, convicting the German-born man of kidnapping his daughter during a supervised visit last summer. His ex-wife, Sandra Boss, a Harvard-educated executive at the management consulting firm McKinsey & Co., testified that she believed her husband's stories about his past for much of their 12-year marriage. It was only when she hired a private investigator during their 2007 divorce that she realized he "was not the person he'd said he was," she said.