Here is the complaint in Lumley v. United States Customs and Border Protection (D. Or.):
Yakama Citizen Sues Government over Tariffs Citing 1855 Treaty
1855 Yakama Treaty
Cougar Den Prevails in Administrative Proceeding Initiated by Washington State’s Continued Effort to Impose Motor Fuel Tax Despite Losing at SCOTUS
Here are the materials in In re Cougar Den Inc. (Wash. O.A.H.):
Cougar Den Motion for Summary J
Initial Order on Summary Judgment Motions
Split SCOTUS Affirms Cougar Den (5-4, no majority opinion)
High Country News Profile of Cougar Den Case
Here.
Oral Argument Transcript in Cougar Den Case
Background Materials in Washington State Department of Licensing v. Cougar Den, Inc.
Supreme Court
–Merits Stage
Sacred Ground Legal Services Amicus Brief
–Cert Stage
supplemental brief for respondent in response to brief of us solicitor general
Washington Supreme Court
Here is the opinion in Cougar Den Inc. v. Washington State Dept. of Licensing.
Briefs:
92289-6 Appellant’s Opening Brief
Ninth Circuit Briefs in Vera v. Bureau of Indian Affairs (FTCA Claim)
Ninth Circuit Briefs in United States v. King Mountain Tobacco Co. (No. 16-35956)
Cert Petition in Washington State Dept. of Licensing v. Cougar Den Inc.
Here:
Questions presented:
Whether the Yakama Treaty of 1855 creates a right for tribal members to avoid state taxes on off-reservation commercial activities that make use of public highways.
Lower court materials here.
UPDATE (8/23/17):
UPDATE (9/6/17):
Turtle Talk 
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