The Widgery Tribunal was instigated to investigate the events of 'Bloody Sunday', 30 January 1972 in Derry where troops from the Parachute Regiment had killed 13 civil rights marchers, (a 14th person died shortly after Baron Widgery's appointment). Widgery was faced with testimony from the soldiers, who claimed they had been shot at, while the marchers insisted that no-one from the march was armed. Widgery's final took the army's side. This film was used as evidence in the House of Commons Committee headed by Lord Widgery (HC 220 1972) which investigated the events surrounding Bloody Sunday.