At the time of the Fanchers' arrival, the Utah Territory was organized as a theocratic democracy under the lead of Brigham Young, who had established colonies along the California Trail and Old Spanish Trail. President James Buchanan had recently issued an order to send troops to Utah. Rumors spread in the territory about the motives for the federal troop movement. Young issued various orders, urging the local population to prepare for the arrival of the troops. Eventually Young issued a declaration of martial law.[4]

The Baker–Fancher party were refused stocks in Salt Lake City and chose to leave there and take the Old Spanish Trail, which passed through southern Utah. In August 1857, the Mormon apostle George A. Smith, of Parowan, traveled throughout southern Utah, instructing the settlers to stockpile grain. While on his return trip to Salt Lake City, Smith camped near the Baker–Fancher party on August 25 at Corn Creek, (near present-day Kanosh) 70 miles (110 km) north of Parowan. They had traveled the 165 miles (266 km) south from Salt Lake City, and Jacob Hamblin suggested that the wagon train continue on the trail and rest their cattle at Mountain Meadows, which had good pasture and was adjacent to his homestead.

 

Christopher Kit Fancher (survivor of the Mountain Meadows massacre)

While many witnesses said that the Fanchers were in general a peaceful party whose members behaved well along the trail, rumors spread about aggressive and threatening behavior and other misdeeds. Brevet Major James Henry Carleton led the first federal investigation of the murders, published in 1859. He recorded Hamblin's account that the train was alleged to have poisoned a spring near Corn Creek; this resulted in the deaths of 18 head of cattle and two or three people who ate the contaminated meat. Carleton interviewed the father of a child who allegedly died from this poisoned spring, and accepted the sincerity of the grieving father. But, he also included a statement from an investigator who did not believe the Fancher party was capable of poisoning the spring, given its size. Carleton invited readers to consider a potential explanation for the rumors of misdeeds, noting the general atmosphere of distrust among Mormons for strangers at the time, and that some locals appeared jealous of the Fancher party's wealth.[5]