Question: What is the name of this former commander, intelligence officer, marine and naval commando who served in the Argentine Navy that the father of  Dagmar Hagelin sought to bring to justice?
Sentence (from "Alfredo Astiz"): He was known as "El Ángel Rubio de la Muerte" (the "Blond Angel of Death"), and had a reputation as a notorious torturer.
Relevant evidence: No