Santiago was born in Tijuana, Mexico by his single mother. He lived with his brother, Emilio. He did almost everything with his brother, slept in the same room, ate with him, went outside with him. When he was younger he loved playing with Emilio and running around the streets causing trouble. When he got older the trouble he was getting into started getting more extreme. He did things like sell drugs, drive by shootings, muggings and robberies. After some internal discrepancies within the cartel, his brother Emilio became the Jefe in the cartel. After a while of dealing narcotics in Tijuana, he went on a plane to assist his brothers with business in Chernarus.