A US trained and armed unit of Mexico's special forces were seen patrolling the streets of Nuevo Laredo, Mexico when people began disappearing. It was deployed to pacify the stronghold of the Zetas cartel but operated indiscriminately and with impunity. Eighteen-year-old and US-born Jorge Dominguez was among 49 reported missing during the six-week operation. "Spring of the Vanishing" tracks Jorge's mother's desperate search for her son and for justice and accountability from both the U.S. and Mexico.