George T. M. Davis relates Joseph shot and wounded 3 of the mob including John Wills ("Mr Wills").
George T. M. Davis, An Authentic Account of the Massacre of Joseph Smith, the Mormon Prophet, and Hyram Smith, his brother, together with a Brief History of the Rise and Progress of Mormonism, and all the circumstances which led to their death (St. Louis, MO: Chambers and Knapp, 1844), 23-24
Joseph Smith, the Prophet, fired his six barrel revolving pistol three times, and one of the balls took effect in the wrist of a man by the name of Wills, and who was among the assailants, as is generally acknowledged. The Prophet, immediately after discharging his pistol at those within the jail, related to the window and sprung upon the sill . . . It is admitted by the Mormons themselves, that Joe had discharged but three of the barrels of his pistol, as was discovered upon examination after his death. Hyrum's was found upon his person, the barrels all loaded, and of course unused by him . . . This Mr. Wills had formerly been a Mormon preacher, was a seceder from Joe and his impositions, and felt no very friendly disposition towards the sect, much less to those charged with treason and confined to the jail. That there was no doubt of his having been wounded by the discharge of a pistol, fired by the Prophet, he gave me the most unqualified assurance. Two other of the citizens of Hancock, were wounded in the conflict, by the firing form the prisoners, as they maintain, but neither of them dangerously.