Martha Gunnison, widow of Captain Gunnison, was one of those who maintained that the attack was planned and orchestrated by militant Mormons under the direction of Brigham Young. Gunnison's letters to his wife throughout the expedition left her with the impression that "the Mormons were the directors of my husband's murder." She wrote to Associate Justice W.W. Drummond, the 1855 federal appointee to the Supreme Court of the Territory of Utah. She received confirmation of this belief in his response to her letter. Drummond drew this conclusion from informant and witness testimonies in several trials after the murders. He cited numerous reports by whites and natives of white attackers dressed up as Indians during the massacre.