Napoleon Bonaparte was murdered by arsenic poisoning and did not die naturally of a stomach cancer, according to a new toxicological study which attempts to end long running historical controversy. "The latest analysis suggests a criminal intent," said Dr Pascal Kintz, a toxicologist who regularly gives expert evidence in court cases, and who conducted a new study on Napoleon's hair. For International Napoleonic Society (INS) spokesman Jean-Claude Damamme the new study by Dr Kintz has produced "the definitive proof of the criminal poisoning of Napoleon". Napoleon died aged 51 in 1821, on the island of St Helena in the south Atlantic, where he had been banished after his military defeat by British and Prussian forces at Waterloo. The toxic form of arsenic, used for centuries as rat poison, was found in Napoleon's hair samples at 37 to 42 times above the normal level in the new study.