Tucson Samaritans volunteer Alvaro Enciso, center, shows a hat he found to Guatemalan Bishop Armando Guerra during an introductory walk along a migrant trail near Arivaca.

Tucson Samaritans volunteer Alvaro Enciso, center, shows a hat he found on the trail to Guatemalan Bishop Armando Guerra, right, during an introductory walk along a migrant trail south of Arivaca, AZ. The trail is one of hundreds of unmarked routes across southern Arizona that migrants use in their trips north. The Tucson Samaritans have hiked more than 2,000 mile worth of trails leaving water and trying to prevent people from dying in the desert.