made their way to the new Mormon settlement in Hancock County, Illinois, where Joseph Smith was killed in 1844. In Doniphan's honor, Joseph and Emma Hale Smith named a son Alexander Hale Smith. In 1843, Porter Rockwell, a controversial Mormon figure later known as "the destroying angel of Mormondom", was arrested in St. Louis and accused of carrying out a failed assassination attempt on (now former) governor Boggs. After nine months of being imprisoned in poor conditions, he was able to hire Doniphan to defend him; Doniphan managed to have the main charge of attempted murder dismissed for lack of evidence, and arranged for Rockwell to serve a five-minute sentence (for a jailbreak attempt during his imprisonment) in the county jail before being released. Rockwell made his way to Illinois, then later to Utah, where he achieved fame as a lawman and Wild West figure. Forty years after the events of 1838, an aged Doniphan visited Salt Lake City, Utah Territory, which had become the nucleus for the largest body of Mormons following the death of Joseph Smith. He received a hero's welcome, and was feted and thanked by the Latter-day Saints for his role in saving the life of their prophet. Mexican–American War In 1846, at the beginning of the Mexican–American War Doniphan was commissioned as Colonel of the 1st Regiment of Missouri Mounted Volunteers, and served in several campaigns, including General Stephen W. Kearny's capture of Santa Fe and an invasion of northern Mexico (present day northern New Mexico). After Santa Fe was secure, Kearny left Doniphan in charge in New Mexico, and departed towards California on September 25, 1846. Doniphan's orders were to wait until General Sterling Price arrived with the Second Missouri Mounted Volunteers, who were coming from Fort Leavenworth, Kansas; after they arrived he was to lead them to Chihuahua via Ciudad Juarez, then known as Paso del Norte. They were to link up with Brigadier General John E. Wool, who was moving southwest from San Antonio, Texas toward Guerrero and Monclova, Coahuila, to attack Monterrey, Nuevo León from the west. Kearny had known that the Navajo people were going on the war path. With the Spanish gone, the Navajos wanted to test these new American soldiers; hence, as Doniphan waited for Price, the Navajos mounted a raid and kidnapped 20 Mexican families. Doniphan was eager to start south, but he first had to wait