This article analyzes the massacre case of about 268 Mayan Achi people in Plan de Sanchez, Republic of Guatemala, in 1982, and the judgment of that State by the Inter-American Court of Human Rights in 2004. The Court unanimously held the State responsible, and ordered material reparations and established of a policy that respects the fundamental rights in the country. However, the punishment of those responsible, despite their efforts, fell short of the expectations, highlighting the sense of impunity of the perpetrators of this genocide. The research used the deductive-normative method, with historical technique.