The most notable "graduate" of Hamilton University was former U.S. government official Laura Callahan, a key figure in the "Project X" email scandal involving the disappearance of thousands of White House emails which had been subpoenaed by Congress. Callahan's diplomas from HU had enabled her to get a high position in the United States Department of Homeland Security. A probe of her claims evolved into an investigation by the Government Accountability Office of Federal employees who had paid diploma mills with taxpayer funds.