Miguel was born in the slums of Tijuana and was raised by their mother and drug addicted father. Growing up he quickly got into his father's cartel. Working for his father Miguel would learn how to do business, take care of money, shoot, sell and everything else that comes with gang banging and smuggling. He was a born psychopath.
Miguels father would later die from a shoot out where a rival gang member shot him. Upon his fathers death Miguel was away in the United States on business and his cousin Emilio Santiago assumed leadership. When Miguel later arrived home he accepted Emilios leadership and swore to God and Jesus that he would remain loyal.
After following Emilios leadership for a few years he was tasked with establishing connections with Russia to increase their stake in the global drug trade. Miguel was sent to Chernarus to meet up with a few Russians to set the whole deal up. After spending a few weeks in Chernarus Emilio himself showed up since the deal was much bigger than what was expected to begin with. The deal was never made.
The apocalypse hit and Miguel was nearly killed in the initial outbreak but him and Emilio stuck together and survived. They survived through it all by helping each other.
After spending their time surviving around Chernarus Miguel decided it was best to move north in hopes of finding a boat to navigate back to Mexico. They got to South Zagoria and that was the place where Emilio died. Saddened by his cousin passing Miguel could not keep control of the Cartel and it eventually disbanded completely after a month. After 2 years of surviving the Apocalypse the Santiago Cartel was no more.
Miguel was offered a place in a group that called themselves Anarchy since a few of his former cartel members had gone there as well. He accepted the offer and is currently in Anarchy.