Mystery surrounding Napoleon's Death

I watched this historic documentary about Napoleon's last days on the Island of Saint Helena in 1821. This is a French documentary so Napoleon is portrayed as a lonely man, who died in questionable circumstances in the hand of the British. In fact, there French historians have always suspected Napoleon's premature death on Saint Helena, far from France. After his defeat in Waterloo (1815), Napoleon accepted the condition of his exile. However, in 1814, he was exiled also but he was able to come back to power just after 100 days. Napoleon was thinking about doing the same this time too, except that the British took all the necessary precautions to not let him come back to power, as he was a threat to the peace in Europe. Napoleon was only allowed to have few people of his entourage with his during the exile.
In 1969 for the bicentennial celebration of Napoleon's death, a historian named George Retil de la Bretonne wrote a book accusing the British of keeping Napoleon's real body. He believes the body resting in the Invalides in Paris is someone else's body. Since then, this hypothesis has been supported by many French historians. Their main argument is that the British poised Napoleon, replaced his body with another to be sent to France in 1840. Napoleon died in 1821 but his body was only returned 19 years later (1840) beyond recognition. The British supposedly hide the real body because it contains the poison used to kill him. The documentary just illustrates another viewpoint about the mystery surrounding Napoleon's death. Even today, some historians continue to defend the poison hypothesis about Napoleon's Death.

Source: L'hombre d'un Doute
http://www.youtube.com/watch?v=fOyqPkP50Kw