 In 1839, to escape persecution—including a literal extermination order given by Missouri governor Lilburn Boggs—the Latter-day Saints drained swamplands on the eastern banks of the Mississippi River and established the city of Nauvoo.Joseph Smith was killed on June 27, 1844 by an angry mob that stormed Carthage Jail in Carthage, Illinois where Smith was being held.In 2004, Illinois's lieutenant governor, Pat Quinn, presented church leaders a copy of House Resolution 793, which expressed "official regret" for the violence that caused the Mormons to leave in 1846.