could potentially be indicted for crimes against the laws and customs of war, the crime of torture, and/or crimes against humanity. Criminal proceedings to this end have begun in Spain: in a move that could have led to an extradition request, Judge Baltasar Garzón in March 2009 referred a case against Yoo to the chief prosecutor. The Spanish Attorney General recommended against pursuing the case. On November 14, 2006, invoking the principle of command responsibility, the German attorney Wolfgang Kaleck filed a complaint with the Attorney General of Germany (Generalbundesanwalt) against Yoo, along with 13 others, for his alleged complicity in torture and other crimes against humanity at Abu Ghraib in Iraq and Guantánamo Bay. Kaleck acted on behalf of 11 alleged victims of torture and other human rights abuses, as well as about 30 human rights activists and organizations. The co-plaintiffs to the war crimes prosecution included Adolfo Pérez Esquivel, Martín Almada, Theo van Boven, Sister Dianna Ortiz, and Veterans for Peace. Responding to the so-called "torture memoranda," Scott Horton noted the possibility that the authors of these memoranda counseled the use of lethal and unlawful techniques, and therefore face criminal culpability themselves. That, after all, is the teaching of United States v. Altstötter, the Nuremberg case brought against German Justice Department lawyers whose memoranda crafted the basis for implementation of the infamous 'Night and Fog Decree'. Legal scholars speculated shortly thereafter that the case has little chance of successfully making it through the German court system. Jordan Paust of the University of Houston Law Center concurred with supporters of prosecution and in early 2008 criticized the US Attorney General Michael Mukasey's refusal to investigate and/or prosecute anyone who relied on these legal opinions: [I]t is legally and morally impossible for any member of the executive branch to be acting lawfully or within the scope of his or her authority while following OLC opinions that are manifestly inconsistent with or violative of the law. General Mukasey, just following orders is no defense! In 2009, the Spanish Judge Baltasar Garzón Real launched an investigation of Yoo and five others (known as the Bush Six) for war crimes. On April 13, 2013, the Russian Federation banned Yoo and several others from entering the country because of alleged human rights violations. The list was a direct response to the so-called Magnitsky list revealed by the United States the day before. Russia stated