On September 30, 1973, six residents of the Santiago Pino camp in the Pudahuel commune (formerly the Barrancas commune) were arrested:

Víctor BARRALES GONZALEZ, 25 years old, laborer, camp leader, Socialist militant;

Sergio Osvaldo DE LA BARRA DE LA BARRA, 26 years old, postal agent for Correos, president of the camp, Socialist militant;

Raúl Eliseo MOSCOSO QUIROZ, 24 years old, camp leader;

Mario SALAS RIQUELME, 24 years old, laborer, camp leader, Socialist militant;

José Eusebio VILLAVICENCIO MEDEL, 25 years old, laborer, vice president of the camp; and

Luis Sergio GUTIERREZ RIVAS, 29 years old, mine worker, Communist militant, former regional secretary in Lota.

According to accounts provided by witnesses, a raid was carried out at the camp, located behind the Casa de la Cultura de Barrancas, at approximately 05:00 hours. The operation was led by military personnel, who arrested six other people who were subsequently released.

The detainees were taken to the Casa de la Cultura, a site used as a detention center, where a group of soldiers belonging to the Escuela de Suboficiales de Santiago and personnel from the Regimiento Yungay de San Felipe were stationed.

All of the detainees died on that same day, September 30, and the place of death was recorded as the "public thoroughfare," with the cause of death listed as "multiple gunshot wounds." Only in the case of Víctor Barrales does the certificate indicate the Santiago Pino camp as the location of the incident. The bodies were transported by military personnel to the Instituto Médico Legal.

Luis Gutiérrez did not die as a result of the gunshot wounds he received, and from the Instituto Médico Legal, he was sent to the Hospital José Joaquín Aguirre; he was visited there by his spouse on October 2, 1973. That same day, she was informed that he had been transferred to the Hospital Militar, where there is no record of his admission, and his trail has been completely lost to this day.

The official version regarding the fate of these six individuals, as published in the newspapers on October 2, 1973, was that at the time of the raid, military forces had been attacked by a group of extremists who were then captured. The press report further stated that "All of them were executed in the camp itself."

The official version provided through the press is not credible, as there is no evidence to suggest the existence of an "attack by extremists"; because even if that had been the case, it would not have been necessary to kill the residents who had been arrested; because there is sufficient evidence to confirm the arrest of the camp residents and their subsequent transfer to the Casa de la Cultura; and because of the selective nature of the arrests and the political affiliations of the detainees.

All of the above led the Commission to the conviction that the extrajudicial executions of Víctor Barrales González, Sergio Osvaldo de la Barra de la Barra, Raúl Eliseo Moscoso Quiroz, Mario Salas Riquelme, and José Eusebio Villavicencio Medel, and the forced disappearance of Luis Sergio Gutiérrez Rivas, constituted a grave violation of human rights, attributable to the actions of State agents.