Sitting Bull did not agree to the treaty. He told the Jesuit missionary, Pierre Jean De Smet, who sought him out on behalf of the government: "I wish all to know that I do not propose to sell any part of my country." He continued his hit-and-run attacks on forts in the upper Missouri area throughout the late 1860s and early 1870s. The events of 1866–1868 mark a historically debated period of Sitting Bull's life. According to historian Stanley Vestal, who conducted interviews with surviving Hunkpapa in 1930, Sitting Bull was made "Supreme Chief of the whole Sioux Nation" at this time.
Indian agency police Cherokee, had well-developed systems of tribal laws and tribal courts; the agency police also enforced these laws, and testified and maintained order in the tribal courts. Since the agency police were federal officers, crimes against them had to be tried in a United States district court. Several Indian agency police were responsible for the death of the Lakota leader Sitting Bull. Indian agency police Indian agency police were policemen hired by United States Indian agents during the late 19th and early 20th centuries and assigned to a Native American tribe. It was the duty of Indian agency police to enforce