Héctor Aldo Fagetti Gallego was an Argentine

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

 activist who disappeared

Forced disappearance

In international human rights law, a forced disappearance occurs when a person is secretly abducted or imprisoned by a state or political organization or by a third party with the authorization, support, or acquiescence of a state or political organization, followed by a refusal to acknowledge the...

 in 1975 during the Presidency of Isabel Perón

Isabel Martínez de Perón

María Estela Martínez Cartas de Perón , better known as Isabel Martínez de Perón or Isabel Perón, is a former President of Argentina. She was also the third wife of another former President, Juan Perón...

, who was President of Argentina

President of Argentina

The President of the Argentine Nation , usually known as the President of Argentina, is the head of state of Argentina. Under the national Constitution, the President is also the chief executive of the federal government and Commander-in-Chief of the armed forces.Through Argentine history, the...

 from July 1, 1974 to March 24, 1976. In January 2007 an Argentine federal judge, Raul Costa, ordered the arrest of former President Isabel Perón over Gallego's disappearance. Isabel Perón was placed under house arrest

House arrest

In justice and law, house arrest is a measure by which a person is confined by the authorities to his or her residence. Travel is usually restricted, if allowed at all...

 in Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 and shortly after it was determined by Spanish courts that she would not be extradited

Extradition

Extradition is the official process whereby one nation or state surrenders a suspected or convicted criminal to another nation or state. Between nation states, extradition is regulated by treaties...

to Argentina to stand trial.