Orrin Porter Rockwell (June 28, 1813 or June 25, 1815 – June 9, 1878) was a figure of the Wild West period of American history. A lawman in the Utah Territory, he was nicknamed Old Port and The Destroying Angel of Mormondom. Rockwell served as a bodyguard, and was a personal friend, of Latter Day Saint movement founder Joseph Smith. After Smith's death in 1844, Rockwell became a bodyguard of his successor, Brigham Young, and traveled with him and members of the Church of Jesus Christ of Latter-day Saints (LDS Church) to the Salt Lake Valley in the present-day U.S. state of Utah.