In 1993, the Department of Justice and the Department of the Interior entered into a memorandum of understanding (MOU) that established guidelines regarding the respective jurisdictions of the Bureau of Indian Affairs (BIA) and the Federal Bureau of Investigation (FBI). Part IV of the MOU requires each United States Attorney whose criminal jurisdiction includes Indian country to develop local written guidelines outlining the responsibilities of the BIA, FBI, and the Tribal Criminal Investigators, if applicable.

[updated January 2020]