Maya Springhawk Robnett / Arizona Science Desk; KAWC

Fifteen years ago, 14 undocumented migrants were found dead from exposure along the U.S./Mexico border near Yuma. In response, Yuma Sector Border Patrol developed emergency beacons for migrants in distress. But the deaths continue, leading a Tucson human rights organization to create a database to identify the dead.  Maya Springhawk Robnett of the Arizona Science Desk reports…