Alvaro Acuña Torres died that day at 7:00 hours, at the Bulnes bridge over the Mapocho river, due to thoracic and abdomino-thoracic gunshot wounds with projectile exit, as recorded in the Medical Death Certificate from the Legal Medical Institute.

Guillermo Arriagada Saldías died that day at 4:00 hours, at the Bulnes bridge over the Mapocho river, due to two gunshot wounds, one abdominal and the other cranioencephalic, as recorded in the Medical Death Certificate from the Legal Medical Institute.

Domingo Gutiérrez Aravena died that day at 9:00 hours, at the Bulnes bridge over the Mapocho river, due to a thoracic gunshot wound with projectile exit, as recorded in the Medical Death Certificate signed by a forensic physician.

According to eyewitnesses, the three victims were detained on September 23, 1973, at their respective homes located in the Nueva Matucana neighborhood, by members of the Ejército and Carabineros who carried out an operation in the sector.

On that occasion, all the men were lined up along the side of the railway tracks, and approximately 15 residents, including the victims, were selected from the group and taken to an unknown destination. The following day, their bodies were found at the Bulnes bridge.

Based on the evidence gathered and the investigation conducted by this Corporation, the Superior Council reached the conviction that Alvaro Javier Acuña Torres, Guillermo Arriagada Saldías, and Domingo Gutiérrez Aravena were detained and executed by State agents outside of any legal process. For this reason, it declared them victims of human rights violations.