This event, long foreseen, was doubtless hastened by the disclosure of the plot formed by Moreau, Pichegru, and Georges Cadoudal against the first consul. There was no proof of Moreau's complicity in designs on Napoleon's life, and the mysterious death of Pichegru in prison left the extent of his complicity among the insoluble problems of history, but there can be no doubt that Cadoudal was justly executed for plotting assassination. Unfortunately some of the under-secretaries in the Addington administration had not only shared the plans of the conspirators so far as they aimed at a rising in France, but had procured for them material assistance. They appear, however, to have been innocent of any attempt on Napoleon's life. Drake, the British envoy at Munich, was, however, deeper in the plot. The evidence of British complicity naturally received the very worst construction in Paris.[26] Napoleon himself certainly believed in an Anglo-Bourbon conspiracy, organised by the Count of Artois and other French royalists, when he caused the Duke of Enghien to be kidnapped in Baden territory and hurried off to the castle of Vincennes. He was, however, already aware of his prisoner's innocence when on March 21 he had him shot there by torch-light after a mock trial before a military commission. All Europe was shocked by this atrocious assassination, and though Napoleon sometimes attempted to shift the guilt of it upon Talleyrand, he justified it at other times as a measure of self-defence, and left on record his deliberate approval of it, for the consideration of posterity. Two months later he became Emperor of the French.