 The control of the Matamoros, Tamaulipas corridor—then becoming the Gulf Cartel—would be left undisturbed to its founder Juan García Ábrego, who was not a party to the 1989 pact.Félix Gallardo still planned to oversee national operations, as he maintained important connections, but he would no longer control all details of the business.When he was transferred to a high-security prison in 1993, he lost any remaining control over the other drug lords.