DINA civil agent Enrique Arancibia Clavel, who was prosecuted in Argentina for crimes against humanity in 2004, was sentenced to life imprisonment for his part in the murder of General Prats. It has been claimed that suspected Italian terrorist Stefano Delle Chiaie was involved in the murder as well. He and fellow extremist Vincenzo Vinciguerra testified in Rome in December 1995 before federal judge María Servini de Cubría that DINA agents Clavel and Michael Townley were directly involved in this assassination. In 2003, Judge Servini de Cubría requested that Mariana Callejas (Michael Townley's wife) and Cristoph Willikie, a retired colonel from the Chilean army, be extradited, as they were accused of also being involved in the murder. Chilean appeals court judge Nibaldo Segura refused extradition in July 2005 on the grounds that they had already been prosecuted in Chile.