In 1975, when the House Committee on Government Oversight investigated the F.B.I.'s illegal COINTELPRO program of spying on and harassment of Martin Luther King Jr. and others, Gandy was called to testify regarding the "Personal Files". "I tore them up, put them in boxes, and they were taken away to be shredded," she told the congressmen about the papers. The Bureau's Washington field office had F.B.I. drivers transport the material to Hoover's home, then once Gandy had gone through the material, the drivers transported it back to the field office in the Old Post Office Building on Pennsylvania Avenue, where it was shredded and burned.