" LOS ANGELES (Reuters) - He was a man for whom the term muckraker was coined, a crusading journalist and novelist who never hesitated to expose scandal at the highest levels of government and business."

"But now the integrity of Pulitzer Prize-winning writer Upton Sinclair is being questioned 38 years after his death because of the discovery of a letter he wrote in 1929."

"Quotes from the letter in recent news reports make it seem that the man who exposed the horrors of the meat-packing industry in the 1906 book "The Jungle" covered up a confession from a defense lawyer that famous anarchists Nicola Sacco and Bartolomeo Vanzetti were guilty of the murders for which they were executed. Many people thought the two were innocent and prosecuted for political reasons. "

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