United States Indian Police

The United States Indian Police (USIP) were organized in 1880 by John Q. Tufts the Indian Commissioner in Muskogee, Indian Territory, to police the Five Civilized Tribes. The USIP recruited many of their police officers from the ranks of the existing Indian Lighthorsemen. Unlike the Lighthorse who were under the direction of the individual tribe, the USIP was under the direction of the Indian agent assigned to the Union Agency. Many of the US Indian police officers were given Deputy U.S. Marshal commissions that allowed them to cross jurisdictional boundaries and also to arrest non-Indians.

In 1886 two Indians killed Sam Sixkiller who was the popular Captain of the US Indian Police and a Deputy U.S. Marshal commissioned by the Judicial District of Western Arkansas. After the killers escaped indictment by the tribes, Congress passed a law (24 Stat., 463.) giving the United States district courts jurisdiction over any Indian who committed a crime against a federally appointed Indian police officer or United States Deputy Marshal.