They work for the federal government — and also to protect sacred lands of the Tohono O’odham Nation along the border with Mexico.

Kevin Carlos hates how the drug runners tramp through the ancient cemeteries and holy places he holds dear.

That peak up there, he says, speeding toward the reservation’s border with Mexico. That’s where the creator lives. His name is I’itoi, the elder brother. He created the tribe out of wet clay after a summer rain. Tribe members still bring him offerings — shell bracelets, beargrass baskets and family photos — and leave them in his cave scooped out of the peak.
But the drug smugglers don’t know that. On their way to supply America’s drug markets, they use these sacred hilltops as lookouts, water holes as toilets and the desert as a trash can.

So Carlos hunts them.