Guillermo García Gómez was originally introduced as the head of the Mexican gang who was doing business with U-Turn. In the end of season three, Nancy promised him half of her MILF money for full protection from blackmailers and rival dealers. After he burned down Agrestic, while trying to help Nancy, he offered her cash in return for sex. She later learned that he was actually part of a much larger organization, run by Esteban Reyes. The organization controls the border from 324 to 666 (hence the "Tres Seis" name of the organization). Tres Seis exports cocaine and prostitutes to the United States, and imports weapons to Mexico. Guillermo was ratted out by Nancy, and then busted by the D.E.A.