Mario Sandoval was an Argentinian police officer and academic who is considered to be one of the most brutal torturers during the Argentine dictatorship of 1976-1983.
[1] In the late 1990s and early 2000s, he was an advisor to the United Self-Defense Forces of Colombia (AUC), a far-right paramilitary group responsible for numerous massacres.
According to Salvatore Mancuso, Mario Sandoval was even involved in drafting the document signed by the elected representatives and the paramilitaries.
[4] The news of his extradition from France to Argentina was welcomed by Argentine human rights activists and relatives of victims of the dictatorship.
[4] Sandoval was nicknamed Churrasco (Barbecue), due to his preferred method of torture being to electrocute people on metal bed frames.