From March 1974 to November 1978 Arancibia was a part of the DINA, and acted as a liaison between DINA and the
Secretariat of Intelligence (SIDE). In 1978, shortly after Townley's extradition to the United States for the murder of diplomat
Orlando Letelier in Washington, D.C. in 1976,
Argentine intelligence officers arrested Arancibia for
espionage. In 2000, Arancibia was sentenced to life in prison for the 1974 assassination of General
Carlos Prats and
Sofía Cuthbert in Bueno Aires, Townley served 62 months of a 10-year sentence for his role in the assassination of Orlando Letelier. Townley's plea bargain for confessing to the Letelier assassination granted him
immunity from further prosecution, preventing his extradition to Argentina on charges related to Prats' assassination. In 2004, an Argentine court convicted Arancibia and sentenced him to 12 years for the kidnapping and torture of Laura Elgueta and Sonia Díaz, two Chilean woman who had been living in Argentina. Elgueta later served as the press chief for former
Minister of Defense Vivianne Blanlot. Although the Prats case remained open in Chile, Arancibia was released on
parole in July 2007 due to technical reasons after spending nearly 20 years in prison in Argentina. == Personal life and death ==