Tijuana, Baja California
Nothing is known about Oliviero's life before the outbreak, except that he lived in Tijuana, Baja California.
Oliviero is outside the infirmary with other sick and elderly residents being cared for by Vieja when Nick and Alejandro stop by. Oliviero tells Alejandro that he knows he is dying and suggests the medicine be saved for other people, to which Alejandro smiles and tells Oliviero not to worry about that.
Ultimately, Oliviero is sacrificed to "the wall" due to the lack of medicine and his rapidly declining health.
Due to his health rapidly declining, he sacrifices himself to "the wall" and gets devoured by the infected inside it.
- This character is credited as Dying Old Man in "Los Muertos".