 The alleged death squad leader was charged specifically with the murders of Argentine Congressman Rodolfo Ortega Peña; former Buenos Aires Provincial Police assistant chief Julio Troxler; university professor Silvio Frondizi (brother of Arturo Frondizi, former Argentine President); and Professor Frondizi's son-in-law, Luis Ángel Mendiburu.Almirón was the principal figure of Triple A to be tried by Argentina.Juan Perón, López Rega and Morales had died.