Jon Krakauer claims that Porter Rockwell tried to assassinate William Boggs.
Jon Krakauer, Under the Banner of Heaven (New York: Anchor), 110-111
As it turned out, the reports of Bogg’s death were premature. Somehow he recovered from his severe brain injuries. The papers were right about the would-be killer, though: Rockwell was almost certainly the would-be assassin, and he was a Mormon. Afraid of nothing, and fiercely devoted to the prophet, Rockwell was already becoming legendary for his willingness to spill the blood of those who had wronged the church, thereby giving them an opportunity to atone for their sins— a career that would become his life’s work and inspire admiring Mormons to christen him the “Destroying Angel” and the “Mormon Samson.”