In accordance with anti-terrorism legislation enacted during a state of emergency declared by the authoritarian government of President Alberto Fujimori, Berenson was tried in a closed courtroom by a military tribunal on a charge of treason against the fatherland for leadership of a terrorist organization. This charge did not require Peruvian citizenship as an element. The proceedings were conducted by a hooded military judge who spoke through a voice distortion apparatus (judges often concealed their identities to protect themselves from assassination). On January 11, 1996, six weeks after her arrest and three days after her presentation to the media, Berenson was convicted of all charges and sentenced to life in prison without parole. An appeal lodged against the conviction was dismissed on January 30. Due to the nature of the closed military court, human rights campaigners protested her conviction and disputed the fairness of the proceedings. In February 1999, after three years of fact-finding, the U.N. Working Group on Arbitrary Detention found that Ms. Berenson had been arbitrarily deprived of her liberty in violation of various articles of the Universal Declaration of Human Rights, of which Peru is a signatory. According to the Carter Center among the violations of international legal standards and due process, "Ms. Berenson's trial was in a secret military court, where her lawyer was not allowed to cross-examine witnesses or challenge evidence," and former president Carter stated directly that he was "deeply concerned that Lori Berenson has not been afforded her rights of due process by law."