How Did Henri Charrière Die?

Henri Charrière was a French writer who was convicted of murder in 1931 by the French courts and pardoned in 1970. He wrote the 1969 novel Papillon, a memoir of his incarceration in and escape from a penal colony in French Guiana. While Charrière claimed that Papillon was largely true, modern researchers believe that much of the book's material came from other inmates, rather than Charrière himself.