Alfonso del Tránsito Vega Cisterna died that day at 12:30 hours, in his home, due to a gunshot wound in the cervical region, as recorded in the Medical Death Certificate from the Legal Medical Institute.

According to statements made by family members, on September 13, 1973, Alfonso Vega was with his family at his home located in the vicinity of an industrial plant, on Calle Bernardo Morales in the Población Germán Riesco, in the commune of San Joaquín.

One of his brothers noted that heavy gunfire could be heard near the industrial plant. Under these circumstances, a bullet entered the home and struck the minor, who died at the scene. His father went out to request help from the military, but they forced him to return to his home. Subsequently, they raided the house and removed the projectile that had remained embedded in one of the walls.

Considering the background information gathered and the investigation conducted, the Superior Council of this Corporation, taking into account the time period and the cause of death, declared Alfonso del Tránsito Vega Cisterna a victim of the prevailing political violence.