Miguel Osvaldo Etchecolatz (born 1 May 1929) is a former senior Argentine police officer, who worked in the Buenos Aires Provincial Police during the first years of the military dictatorship of the 1970s. Etchecolatz was deeply involved in the "anti-subversion operation" known as the National Reorganization Process ("El proceso"). He was first convicted in 1986 of crimes committed during this period, but passage that year of the "Ley de Punto Final," which created amnesty for security officers, meant that he was released without a sentence. In 2003 Congress repealed the law, and the government re-opened prosecution of crimes during the Dirty War.