....While the Gulf Cartel is a diminished force, it retains control of a number of significant border regions, most notably Reynosa and Matamoros, and continues to battle it out with the Zetas in other cities around the region, such as Monterrey and Tampico. Indeed, while its territory has been reduced, the Gulf's level of control in the areas that remain under its dominion seems to have hardened, despite the ongoing battle with the Zetas.
According to Proceso, this is due to the links between Costilla Sanchez and high-level elements in the military. The anonymous source whose account was the basis for the story says that, in exchange for millions of dollars, army and marine commanders essentially give Costilla Sanchez free rein to operate in Mexico’s northeastern region, and attack his enemies as needed." read more