Young, Brigham (1801-1877), led the Mormons from Illinois to what is now Utah, and established their church there. Young was the second president of the Mormon church, which is officially called the Church of Jesus Christ of Latter-day Saints. He became the Mormon leader in 1844, after Joseph Smith, the church founder, was shot to death. Young was a tireless worker. A strong will, engaging personality, and deep convictions made him an outstanding leader.