During the late 1960s and early 1970s, Brazil's dictatorship arrested, tortured, and interrogated many people it suspected of subversion; hundreds of those arrested were killed in prison. In May 1970, Marcos P. S. Arruda, a young political activist, was seized in SAo Paulo, imprisoned, and tortured. "A Mother's Cry" is the harrowing story of Marcos's incarceration and his family's efforts to locate him and obtain his release. Marcos's mother, Lina Penna Sattamini, was living in the United States and working for the U.S. State Department when her son was captured. After learning of his arrest,...