Selected Appellate Cases

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• In State v. Ariaga (2024), Mr. Trebon successfully argued for the reversal and remand of a superior court's refusal to reinstate civil rights.
• In State v. Krause (2015), working with the Arizona Innocence Project, Mr. Trebon successfully argued that evidence in a manslaughter case was without scientific basis, obtaining review and relief for the client.
• In State v. Fish (2009), Mr. Trebon successfully obtained a reversal and remand of second-degree murder conviction in a self-defense shooting.
• In Duro v. Reina (1990), before the U.S. Supreme Court, Mr. Trebon argued successfully against Tribal jurisdiction over non-member Indians, and subsequently in Means v. Navajo Nation (2005) defended appellant Russell Means in a similar jurisdictional matter.
• In Arnett v. Ricketts (1986), Mr. Trebon successfully demonstrated civil-rights violations in a capital conviction case.
• In Vanes v. United States Parole Commission (1984), a matter involving loss of parole, Mr. Trebon successfully obtained the reversal of a court's revocation of "street time".

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• In Doe v. LDS et al. (2025), three survivors of childhood sexual abuse sought restitution from their church, two of whose bishops and their wives had failed to report the abuse. In Doe v. Warr (2025) the same three survivors sought restitution from a Sunday school teacher and babysitter who had failed to report the abuse (and from other defendants in other actions). The superior court found on behalf of the defendants in the first matter on the basis of clergy-penitent privilege, and in the second on the basis that the defendants had not had care of the children in a professional capacity specifically named by the statute. Representing the appellants, Mr. Trebon successfully obtained reversal of both judgments.

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• In Kirsten v. Arizona Department of Transportation (2024), Mr. Trebon successfully argued against the state's revocation of appellant's driver's license on the sole basis of cannabinoid metabolites in the blood, because the state had not shown impairment.

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• In Nelson v. Initiative Comm. to Reduce Navajo Nation Council (2011), Mr. Trebon served as counsel for the petitioner / appellant in a case whose outcome applies the traditional Navajo concepts of ideenágo and nályééh to the matter of payability of legal fees.
• In Arizona v. Zaman (1997, 1998), Mr. Trebon successfully argued against admission of improperly collected evidence and improper process service on Tribal lands. 
• In Duro v. Reina (1990), before the U.S. Supreme Court, Mr. Trebon argued successfully against Tribal jurisdiction over non-member Indians, and subsequently in Means v. Navajo Nation (2005) defended appellant Russell Means in a similar jurisdictional matter.

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• In Villasenor v. Evans (2016), Mr. Trebon successfully defended a public employee against a defamation suit on appeal. 
• The parents of a young person who died by suicide in a county jail sought summary tort judgment, and their claims were dismissed. On appeal in Simmons v. Navajo County (2009), Mr. Trebon obtained partial vacation of the dismissal, and remand for further proceedings.
• In Midling Construction v. Reilly (2008), Mr. Trebon represented an appellant in a home construction dispute, and obtained remand on the basis of prejudicially admitted evidence.
• An individual died in county jail without adequate medical attention. When their parents filed a wrongful death suit, defendants obtained summary judgment on technical grounds. Mr. Trebon represented the family on appeal in Calnimptewa v. Flagstaff Police Dept. (2001) and obtained remand for further proceedings.

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