Eugenio Berríos  Eugenio Berríos Sagredo (November 14, 1947 – 1992) was a Chilean biochemist who worked for the DINA intelligence agency. Berríos was charged with carrying out "Proyecto Andrea" in which Pinochet ordered the production of sarin gas, a chemical weapon used by the DINA. Sarin gas leaves no trace and victims' deaths closely mimic heart attacks. Other biochemical weapons produced by Berríos included anthrax and botulism. Berríos also allegedly produced cocaine for Pinochet, who then sold it to Europe and the United States. In the late 1970s, at the height of the Beagle Crisis between Chile and Argentina, Berríos is reported to have worked on a plan to poison the water supply of Buenos Aires. Wanted by the Chilean authorities for involvement in the Letelier case, he escaped to Uruguay in 1991, at the beginning of the Chilean transition to democracy, and what has been identified as his corpse was found in 1995 near Montevideo. Known in the DINA under his alias "Hermes", for which he began to work in 1974, Berríos was connected to the creation of the explosive used for Orlando Letelier's car-bombing assassination in Washington, D.C. in 1976. In April 1976, Berríos synthesized sarin. He was also suspected, along with DINA agent Michael Townley, of the torture and assassination of the Spanish citizen Carmelo Soria. In 1978, Townley, in a sworn but confidential declaration, stated that sarin gas was produced by the DINA under Berríos' direction. He added that it was used to assassinate the real state archives custodian Renato León Zenteno and the Chilean Army Corporal Manuel Leyton. Former head of DINA Manuel Contreras declared to Chilean justice officials in 2005 that the CNI, successor of DINA, handed out monthly payments between 1978 and 1990 to the persons who had worked with Townley in Chile, all members of the far-right group "Patria y Libertad": Mariana Callejas (Townley's wife), Francisco Oyarzún, Gustavo Etchepare and Berríos. According to "La Nación", Berríos also worked with drug traffickers and Drug Enforcement Administration agents. Questioned in March 2005 by Judge Alejandro Madrid about ex-Chilean Christian Democrat President Eduardo Frei Montalva's death, DINA agent Michael Townley acknowledged links between Colonia Dignidad, led by ex-Nazi Paul Schäfer, and DINA on one hand, and the Laboratorio de Guerra Bacteriológica del Ejército (Army Biological Warfare Laboratory) on the other hand.