CONCURRING OPINION OF JUDGE A.A. CANÇADO-TRINDADE 1. I have voted in favor of the adoption of the Judgment rendered in the Case of Almonacid-Arellano et al. v. Chile by the Inter-American Court of Human Rights. Given the importance of the issues considered in this Judgment by the Court, I feel obliged to append this Opinion, containing my personal reflections, as the basis of my position on the matters addressed by the Court. I shall focus on three main points, as follows: a) the lack of legal validity of self-amnesties; b) self-amnesties and the obstruction and denial of justice: extension of the material scope of jus cogens prohibitions; and c) the conceptualization of crimes against humanity at the confluence of International Human Rights Law and International Criminal Law. I. Lack of legal validity of Self-amnesties 2. This Judgment rendered by the Inter-American Court in the Case of Almonacid-Arellano et al. v. Chile follows the line of reasoning first introduced in its historic Judgment (of March 14, 2001) in the Case of Barrios Altos v. Peru, in which the Court stated that: “This Court considers that all amnesty provisions, provisions on prescription and the establishment of measures designed to eliminate responsibility are inadmissible, because they are intended to prevent the investigation and punishment of those responsible for serious human rights violations such as torture, extra-legal, summary or arbitrary execution and forced disappearance, all of them prohibited because they violate non-derogable rights recognized by International Human Rights Law” (para. 41). The Judgment rendered by the Court in the Case of Barrios Altos, -in which there was acquiescence on the part of the Peruvian State-, has become well-known and renowned within international legal circles throughout the world as it was the first time an international court held that a self-amnesty law had no legal effects. In its Judgment in the Case of Barrios Altos, the Court found, for the first time in history and categorically, that: “Owing to the manifest incompatibility of self-amnesty laws and the American Convention on Human Rights, the said laws lack legal effect and may not continue to obstruct the investigation of the grounds (…) or the identification and punishment of those responsible (…)” (para. 44). 3. Even though in the Case of Almonacid-Arellano et al. v. Chile the State did not acquiesce to the claim, it has adopted a positive and constructive approach to the proceedings before the Court (as evidenced by this Judgment) insofar as it has not disputed that (self-amnesty) Decree Law No. 2.191 of April 18, 1978 violates the American Convention (para. 90) and, moreover, the State itself has admitted that “in principle, amnesty or self-amnesty laws are contrary to the rules of International Human Rights Law” (para. 112). In this Judgment, the Court has rightly characterized Decree Law No. 2.191 as a self-amnesty law, enacted by the “military regime in order to shield its own crimes,” perpetrated during the curfew imposed between September 11, 1973 and March 10, 1978, “from the hands of justice” (paras. 119 and 81(10)).

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