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.
Antonio is outside the supermarket with the other gang members packing up supplies into the vehicles when Nick and Reynaldo approach the hideout. A gang member rushes over to Antonio and alerts him of their presence. He raises his gun at them and brings them to Marco as requested. He watches as Marco explains to Nick and Reynaldo that he started an alliance with Ramiro and advises them to leave La Colonia if they want to live.
Antonio is among the gang members as they break into La Colonia, quickly moving through "the wall" and through the bus into the settlement. They find it abandoned and begin shooting their guns in celebration. However, they investigate "the wall" once they hear the bus starting and witness the zombies moving towards the town. They attempt to shoot as many zombies as possible before retreating towards the market. The zombie horde proves too much as Antonio and the rest of the gang are attacked and killed, with everyone reanimating.
Alejandro leads the herd towards Antonio by starting the bus, which kills him and his gang.