The Nauvoo Expositor was a newspaper in Nauvoo, Illinois, that published only one issue, on June 7, 1844. Its publication set off a chain of events that led to the death of Latter Day Saint prophet Joseph Smith.The Expositor was founded by several seceders from the Church of Jesus Christ of Latter Day Saints and some non-Mormons in the Nauvoo area. The single edition of the newspaper was critical of Smith and other church leaders.