Rodolfo Almirón, arrested in Spain in 2006, was alleged to be his chief operating officer of the group, and was officially head of López Rega's and Isabel Perón's personal security.

The Triple A was believed to have been organized in 1973 by José López Rega and Alberto Villar, deputy chief of the Argentine federal police, during the brief interim presidency of Raúl Lastiri in 1973.

The Spanish Judge Baltazar Garzón's investigations, directed at human rights abuses internationally, revealed that Italian neofascist Stefano Delle Chiaie had also worked with the Triple A, and was present at Ezeiza.

[citation needed] The group first came to national attention on 21 November 1973 in its attempt to murder Argentine Senator Hipólito Solari Yrigoyen by a car bomb.

The 1986 study by Ignacio Jansen González is often cited; he estimates the group committed 220 terrorist attacks from July to September 1974, which killed 60 and severely wounded 44; as well as 20 kidnappings.

[22] Federal judge Norberto Oyarbide, who signed the extradition order against former leader of the AAA Rodolfo Almirón, ruled in December 2006 that Triple A's crimes qualified as human rights violations and the "beginning of the systematic process directed by the state apparatus" during the dictatorship.

Others implicated in the event were Italian neofascist Stefano Delle Chiaie and Jean-Pierre Cherid, former member of the French OAS and at the time part of the GAL death squad in Spain.