On October 2, 1968, he was taken by the authorities at the Plaza of the Three Cultures during the Tlatelolco massacre, and was imprisoned until 1971.
2 Ekim 1968'de Tlatelolco Katliamı'nda Plaza de las Tres Culturas'da yetkililer tarafından gözaltına alındı ve 1971 yılına kadar hapsedildi.