The experts — attached to the Inter-American Commission on Human Rights — say confessions of detainees with credible complaints of torture underpin key parts of the official version of what happened to the 43 students.
After disputing the Mexican government's version of events, a group of experts is claiming that the government is behind a smear campaign intended to destroy their reputations.
The UN's High Commissioner for Human Rights slammed Mexico's record on abuses, torture, and illegal executions, saying 'I wish everyone could meet' victims of state violence in the country.
Mexican defense secretary Salvador Cienfuegos said emphatically on Tuesday that soldiers in Guerrero did not participate in the attacks that left 43 young men missing.
Despite the damning report by an independent panel, a government official defended the original investigation this week. President Enrique Peña Nieto said he would meet parents of the missing as the one-year mark approaches.