Here are the materials in Barbre v. Whitten (E.D. Okla.):
Available on the Carpenter v. Murphy background page, but also here:
Tenth Circuit opinion:
Order Denying En Banc Petition [amended panel opinion]
Here are the merits briefs:
Cert stage briefs:
Tenth Circuit en banc stage materials:
Tenth Circuit panel stage materials:
Whether the 1866 territorial boundaries of the Creek Nation within the former Indian Territory of eastern Oklahoma constitute an “Indian reservation” today under 18 U.S.C. § 1151(a).
Lower court materials here.
Here are the primary briefs:
Here are additional briefs
Panel materials here.