The Nauvoo City Council records Joseph Smith as a martyr in January of 1845.
Nauvoo City Council, "Ordinance, 11 January 1845–A," 228, The Joseph Smith Papers, accessed February 5, 2022
An Ordinance in relation to a ferry across the Mississippi River
Section 1 Be it ordained by the City Council of the City of Nauvoo, that Brigham Young is authorized and licenced to keep a ferry across the Mississippi River at the City of Nauvoo in place of Joseph Smith martyr’d under the same privileges and restrictions and regulations specified in an Ordinance entitled an Ordinance to establish a ferry across the Mississippi River at the City of Nauvoo passed June 1st. 1843
Section 2 This Ordinance to be in force from and after its passage.
Passed January 11. 1845
Daniel Spencer Mayor
Willard Richards— Recorder—