Here is the opinion in Cosentino v. Fuller:

Opinion

An excerpt:

For sovereign immunity to apply, the claims against tribal officials must be based on actions the officials took in their  official capacity and within the scope of their official authority. An official’s actions that exceed the scope of his or her authority are not protected. Although the parties do not dispute that as members of the tribe’s gaming commission Defendants had the authority to revoke a gaming license if they received reliable information the licensee no longer satisfied the requirements for obtaining a license or had engaged in conduct that reflected poorly upon the tribe or its gaming activities, the record lacks evidence showing Defendants received any such information about Cosentino or an explanation of why they revoked his gaming license. Cosentino, however, presented evidence supporting his claim Defendants exceeded the scope of their authority by revoking his license without cause and in retaliation against him. Sovereign immunity prevents us from inquiring into the reliability of information Defendants may have relied upon in revoking Cosentino’s license or any other errors they may have made, but it does not prevent inquiry into whether Defendants exceeded their authority by using their official position to intentionally harm Cosentino.

Materials in a related Ninth Circuit matter are here.