Born and raised in the dangerous neighborhoods of East Angellos, Angel Sinise learned about urban warfare early on. His mixed heritage was a contention that left him with few friends growing up. As such, he developed an extremely close bond with his older brother, Miguel. One day while returning home from the park, Angel and Miguel ran into members of the 13th Street Mob, a local street gang. They demanded money and when the brothers could not produce any, they brandished a knife. Sinise chose the USCM.