Here is the opinion in Loya v. Gutierrez.
An excerpt:
Given New Mexico’s highways that traverse both state and tribal lands, it is not uncommon that a tribal police officer patrolling those highways may be commissioned as a deputy county sheriff to arrest non-Indians and prosecute them in state court when they commit state traffic offenses on tribal land. In light of those recurring facts, we determine a county’s legal obligation when a non-Indian, arrested by a tribal officer and prosecuted in state court for state traffic offenses, sues the arresting tribal officer for federal civil rights violations. More particularly, we decide when the county has an obligation under the New Mexico Tort Claims Act, NMSA 1978, §§ 41–4–1 to –29 (1976, as amended through 2009) (NMTCA), to provide that tribal police officer with a legal defense in the federal civil rights action. The district court as well as our Court of Appeals found no such legal duty, in part because it concluded that the tribal officer was not a state public employee as defined in the NMTCA. We hold to the contrary, finding clear evidence in the text and purpose of the NMTCA requiring the county to defend the tribal officer, duly commissioned to act as a deputy county sheriff, under these circumstances endemic to the New Mexico experience.
We now have the briefs (5/21/15):
Gutierrez Response to NMAC Brief
Turtle Talk 