Franz Halder
Over the following weeks, Himmler's Gestapo, driven by a furious Hitler, rounded up nearly everyone who had the remotest connection with the plot. The discovery of letters and diaries in the homes and offices of those arrested revealed the plots of 1938, 1939, and 1943, and this led to further rounds of arrests, including that of colonel general Franz Halder, who finished the war in a concentration camp. Under Himmler's new (blood guilt) laws, many relatives of the principal plotters were also arrested in the immediate aftermath of the failed plot.