The Dirección Federal de Seguridad (Federal Security Directorate, DFS) was a Mexican intelligence agency. Created in 1947, at the eve of the Cold War, under Mexican president Miguel Alemán Valdés, with the assistance of U.S. intelligence agencies (namely the CIA) as part of the Truman Doctrine of Soviet Containment, with the duty of "preserving the internal stability of Mexico against all forms subversion and terrorist threats". It was merged into the Centro de Investigación y Seguridad Nacional (CISEN) in 1985.
During the period from 1968 to the late 1970s (a period called The Mexican Dirty War), the DFS was accused of illegal detentions, torture, assassinations and forced disappearances. At least 347 complaints were received by the United Nations related to Mexican State crimes from 1960 to 1980.
The agency was highly successful in thwarting and deterring any attempt by anti-government or pro-soviet organizations to destabilize the country, however being a notoriously controversial government entity, it was finally disbanded under the presindecy of Miguel de la Madrid by the hand of his secretary of the interior Manuel Bartlett Díaz in the year 1985, a decision finally taken given the suspected (and later confirmed) links between many of it's agents, including top members like Nazar-Haro and Arturo Durazo Moreno, with criminal exploits like a million dollar US-Mexico car theft ring, collaborating in drug traffick oppertains with the Guadalajara Cartel (including the protection of the infamous "Colonia Bufalo" marijuana crops), training the Nicaraguan contras in drug trafficker owned ranches, the murder of journalist Manuel Buendia, for investigating ties between the DFS, the CIA and Drug traffickers, and for having some degree of participation in, and providing cover to, the kidnapping and subsequent death of DEA agent Enrique Camarena Salazar.