"[1] Castro's son, Jesús Peña, a member and militant of the Workers' Revolutionary Party (PRT), a Marxist political party, was kidnapped in La Plata, Argentina, on June 26, 1978.
[1] Her younger son, Isidoro, disappeared in Buenos Aires on July 10, 1978, just days after his older brother.
[1] The disappearance of her sons led Zulema Castro de Peña to campaign for answers for decades.
[1] Forensic anthropologists determined that both of her sons had been killed in an investigation finally conducted in 1997.
[1] Zulema Castro de Peña, a longtime resident of La Plata, died in the city on January 22, 2013, at the age of 92.