Supreme Court Merits Briefs:
Merits Stage Amicus Briefs Supporting Petitioner:
Oklahoma DAs and Sheriffs Amicus Brief
States Amicus Brief Supporting Oklahoma
Merits Stage Amicus Briefs Supporting Respondent:
Peace Commission Treaty Tribes Amicus Brief
Cert stage materials in Oklahoma v. Castro-Huerta:
Oklahoma DAs Association Amicus Brief.pdf
Oklahoma Environmental Federation Amicus.PDF
Cherokee Nation Amicus Brief.pdf
Chickasaw and Choctaw Amicus.pdf
Lower court materials:
Castro-Huerta Brief on Reservation Disestablishment.pdf
State Brief on Concurrent Jurisdiction.pdf
Castro-Huerta Response Brief on Concurrent Jurisdiction.pdf
Oklahoma District Court Opinion.pdf
Castro-Huerta Petition in Error
Castro-Huerta Motion to Issue Mandate
Also, the plea agreement in United States v. Castro-Huerta (N.D. Okla.):
Turtle Talk 