Here is the opinion in United States v. Gatewood (D. Ariz.):

DCT Order Denying Gatewood Motion to Dismiss

An excerpt:

Defendant argues that because the Tribe receives federal funding, regulatory oversight, and law enforcement assistance from the BIA, “it no longer makes sense to maintain the fiction that federal and tribal governments are so separate in their interests that the dual sovereignty doctrine is universally needed to protect one from the other.” (Doc. 137 at 7). Defendant further contends that this cooperation transforms the Tribe from a “dependant sovereign power” into a “political subdivision” of the federal government. Id. at 6.

Although the financial and regulatory relationship between tribal authorities and the federal government may be significant, this mutual cooperation does not create a “de facto divestiture of tribal sovereignty” or rise to the level of collusion necessary to meet the Bartkus exception.

And:

Defendant also claims that “Agent Hawkins assisted the White Mountain Apache Tribal Prosecutor John Major in securing information about the case,” citing activities by Agent Hawkins such as faxing Defendant’s criminal history to the White Mountain Apache Tribal Prosecutor’s Office and his presence at nearly all investigation and interviews after being notified of the allegations. (Doc. 137 at 2). Mere assistance and the sharing of records,  however, is insufficient proof of manipulation or undue coercion by federal authorities. Since Defendant has not provided the Court with specific allegations of coercion or collusion that would justify an evidentiary hearing, Defendant’s request for a hearing is denied.