Desc: Los Años de Fierro: Directed by Santiago Esteinou. With César Fierro, Sergio Fierro. The Years of Fierro tells the story of César Fierro, the oldest Mexican prisoner on death row in the United States. César has waited for an execution date for more than 30 years, always insisting that he is innocent. This documentary is a reflection on justice, imprisonment and brotherly love, through the eyes of César and his bother, Sergio. These two brothers still hope to meet again, no matter the time or the distance.