MEXICO. Baja California. Wednesday, May 5, 2021. Collectives with names like Searching Mothers and Warrior Searchers have emerged nationwide to undertake the work they claim their government has neglected: locating and identifying their relatives, and laying them to rest. In the sparsely populated state of Sonora, 4,400 people are missing. These signs adorned the exterior wall of a police station in Caborca, Sonora.