Tijuana, Baja California
Nothing is known about Antonio's life before the outbreak, except that he lived in Tijuana, Baja California with a gang he joined after leaving his brother Hector and aunt Elena.
Antonio is with Marco searching the streets of Tijuana for the location of La Colonia when they stumble upon Francisco and his family. They capture the family and bring them back to their supermarket. Later, he is greeted by Elena and Madison as they propose a trade of fish and ice for medicine. Antonio agrees to the trade and goes to retrieve their medicine. However, when Madison barges into Marco's office, Antonio is called to take the women away by an angry Marco. Antonio escorts the women away and tell them not to come back, as they won't be staying at the supermarket much longer.