9 50. On September 3 and 4, 2002, the Court, at a public hearing on merits and possible reparations, heard the statements of the witnesses and the report of the expert witness proposed by the Commission and by the representatives of the alleged victims and their next of kin, respectively. The Court also heard the final oral arguments of the parties. There appeared before the Court: for the Inter-American Commission on Human Rights: Marta Altolaguirre, delegate; and Ignacio Álvarez, adviser. for the alleged victims and their next of kin: María Clara Galvis Patiño, lawyer, CEJIL; and Javier Mujica Petit, representative, CEDAL. for the State of Peru: Fernando Elías Mantero, agent; and Mario Pasco Cosmópolis, deputy agent. Witnesses proposed by the Inter-American Commission on Human Rights: Carlos Torres Benvenuto; and Guillermo Álvarez Hernández. Expert witness proposed by the representatives of the alleged victims and their next of kin: Máximo Jesús Atauje Montes. 51. At the public hearing on merits and possible reparations, the President granted the parties 30 days to present their final written arguments. 52. On September 3, 2002, during the public hearing on merits and possible reparations, Máximo Jesús Atauje Montes also presented his written expert report. 53. On September 4, 2002, during the presentation of the final arguments of the parties to the public hearing on merits and possible reparations, the representatives of the alleged victims and their next of kin presented a document entitled “La seguridad social y los sistemas de pensiones en el Perú”[Social security and pension systems in Peru]. 54. On September 5, 2002, the representatives of the alleged victims and their next of kin forwarded several documents they had offered during the public hearing on merits and possible reparations. 55. On October 2, 2002, the representatives of the alleged victims and their next of kin requested a 30-day extension for the presentation of their final written arguments. The same day, the Secretariat, on the instructions of the President, informed the parties that a non-extendible period to October 30, 2002, had been