Speer's crimes included using and organising slave labour in death camps and prolonging the war by his fanatical work to develop the Nazi war machine. He was hunted by two groups. The UN War Crimes Commission, but first he was wanted by the US Strategic Bombing Survey. This strange group of people included the economist JK Galbraith and the veteran arms negotiator Paul Nitze. These were hardly hardened prosecutors and they had authorisation from the highest level to keep Speer out of the hands of the Criminal Investigators from the UN. They tracked Speer down and spirited him away to a country house after the war, where he was extensively questioned, giving the Americans detailed information about the effectiveness of US bombing. This was critical intelligence and would eventually shape much of US strategy during the Cold War. When this story leaked out it caused huge controversy as the hint has always been that the Americans agreed to go easy on Speer at his trial in exchange for his co-operation.