"Socorro Rivera tried to organize the workers against the latifundio. He was killed at the paraje of Las Varitas by the Guardia Blancas five years ago "

Not much is known about Socorro Rivera before his arrival in the Babícora area in 1938. A native of San Luis Potosí, it was rumoured that he was a former soldier who had come with the full support of President Lázaro Cárdenas in organising the peasants in the expropriation of lands from the Babícora estate.

Rivera was murdered by Hearst’s Guardia Blanca mercenaries on the 14th April 1939.