The Five Civilized Tribes each had their own governments, laws, courts, and police. The Cherokee had the Cherokee Lighthorse, a police force of their own. The Creek Nation had its own legal system. These governments held jurisdiction over tribal citizens — but not over non-citizens. A non-Indian who committed a crime against another non-Indian in the territory fell under federal jurisdiction, and that meant the courts at Fort Smith, Muskogee, or Paris — and the deputies who served warrants for those courts.
The Creek Freedmen — Black people who had been enslaved by Creek tribal members, then emancipated by the postwar treaties — occupied a particularly complicated legal position. Some were enrolled as tribal members; the terms and extent of their citizenship rights within the Creek Nation were disputed and contested throughout the period. Castella Brown, Benjamin Reeves’s wife and his murder victim, was a Creek Freedwoman who had received a 40-acre land allotment from the Creek Nation in 1899. Her legal identity and property rights were documented — a fact that would become relevant in the estate proceedings after her killing.
Bass Reeves policed this territory at a time when the United States government was actively working to dismantle the tribal governance structures that had been established there. The Dawes Act of 1887 began the allotment process — breaking up communally held tribal land into individual plots and opening surplus land to non-Indian settlement. By the 1890s, the allotment process was accelerating, the land runs were occurring, and the social fabric of Indian Territory was being deliberately reorganized around the interests of white settlers and federal land policy.