Luis Aurelio Gálvez Fuentes, Dide Jenning Jélvez Morales, Mauricio Andrés Muñoz Ulloa, Arnoldo Antonio Parra Gutiérrez, Roberto de Jesús Rojas, and Juan Carlos Yáñez Martínez died that day, between 17:00 and 23:30 hours, due to gunshot wounds, as recorded in the respective Medical Death Certificates from the Legal Medical Institute. All of them died inside the former Santiago Penitentiary.

According to records from the respective judicial proceeding, their deaths occurred as a consequence of an attempted escape by a group of common prisoners and prisoners for political reasons; in the events, two other people were killed and 25 suffered injuries from bullets and pellets of varying severity.

One of the prisoners who planned the escape declared that on that day they used improvised firearms, which they had allegedly built themselves. The escape attempt began when they took the gendarme Arnoldo Parra hostage in order to successfully pass through the various access doors of the penal facility.

During the attempt, they were discovered by other gendarmes, leading to a shootout. The gunfire subsequently spread to other streets and galleries of the penal facility, where there were inmates who were not related to the escape attempt.

These shots were fired by some of the mutineers, by officials of the Gendarmerie, of Carabineros, of the Central Nacional de Informaciones (CNI), and by military personnel guarding the Ejército (Army) Fábricas de Maestranza (FAMAE) facility, which is adjacent to the prison grounds.

Dide Jélvez, who participated in the escape attempt, according to witness statements, took refuge in a pit after the shootout began with other prisoners who, like him, were unarmed and avoiding being wounded. When they were leaving the hiding place a while later, with their hands held high, he was struck by shots fired by Gendarmerie officials.

Arnoldo Parra died as a result of the same shootout in which Dide Jélvez was killed. According to witnesses, after having taken cover from the gunfire, he had also left the hiding place with his hands held high, shouting his name and identifying himself as a gendarme.

Luis Gálvez, Roberto Rojas, and Juan Carlos Yáñez died in different sectors of the prison facility that, according to multiple witness statements, were distant from the place where the escape attempt occurred.

The official version from the Gendarmerie asserted that the three "were active and direct protagonists in the disturbances and disorder carried out inside the establishment, resulting in a generalized mutiny." This version was refuted by witnesses who asserted that they were not participating in the escape and that their deaths were the consequence of an uncontrolled and indiscriminate reaction by Gendarmerie personnel.

Consistent with this, the judicial proceeding records that all three were unarmed at the moment they were shot.

Mauricio Muñoz, according to the version of several eyewitnesses, died from a shot fired by a Gendarmerie official, who approached him and shot him at close range from the front, striking him in the upper part of the right eye.

The witnesses asserted that he was not participating in the escape, limiting himself to observing the events from a sector far from where they were occurring. The Autopsy Report recorded that the cause of his death is consistent with a homicidal action.

At the time these cases were examined, the judicial investigation was still in progress.

Considering the background information gathered and the investigation carried out by this Corporation, the Superior Council, given the political nature of the events in which their deaths occurred, declared Luis Aurelio Gálvez Fuentes, Dide Jenning Jélvez Morales, Arnoldo Antonio Parra Gutiérrez, Roberto de Jesús Rojas, and Juan Carlos Yáñez Martínez to be victims of the prevailing political violence.

Furthermore, the Superior Council, bearing in mind that the death of Mauricio Andrés Muñoz Ulloa occurred as a consequence of the irrational use of force by an agent of the State, declared him a victim of human rights violations.