charge of the investigation into those responsible and the institution to which the latter belonged,342 particularly in the case of State agents. 267. This Court assesses positively the measures taken by the State from 1993 to 2002, to recover the remains of the people who were executed, some of whom were buried in communal graves or clandestine cemeteries. Despite these efforts, approximately 30 years after the grave acts of the Río Negro massacres were perpetrated, the State has not taken further measures to search for, individualize and identify other victims who died or disappeared during the massacres, and has not identified several skeletons that have already been found. In addition, as already mentioned in this Judgment, the exhumations were performed, above all, based on the requests and criminal complaints made by the surviving victims of the massacres rather than at the State’s initiative (supra para. 219). 268. Consequently, the Court considers that the State, in addition to the investigations and criminal proceedings that are currently underway, must immediately prepare a meticulous plan to search for the members of the Río Negro community who were forcibly disappeared, as well as to find, exhume and identify the persons who were presumably executed, and to determine the cause of death and possible prior injuries. In this plan, the State must include the maximum use of its human, scientific and technical resources that are appropriate for these purposes. In this regard, the State must: a) Present to the Court, within six months of notification of this Judgment, a timetable with specific short and medium-term goals, including an estimate of the required administrative and budgetary resources, and indicating the State authorities or instances that will intervene in the search, exhumation and identification of those who disappeared and those presumably executed, as appropriate, the competence of each of them, and which authorities or instances will coordinate activities; b) Employ or use the required relevant national and/or international scientific and technical standards;343 c) Ensure that the State officials and any other persons who intervene in or supports the work of searching, exhumation and identification, as applicable, have due guarantees of safety, and initiate the necessary investigations should any threats to or violence against these persons arise; d) Incorporate, ex officio, the determination of the causes of death and injuries, as appropriate, into the investigations that are underway or those that are opened into the massacres in this case, for the pertinent effects; e) Inform the representatives of the victims, in writing, about the progress of the search, location, identification, and determination of the cause of death and prior injuries, of the persons disappeared and presumably executed and, as appropriate, return the remains of the said persons to their next of kin (infra para. 270). The copies of the said communications and the responses of the 342 Cf. Case of the Dos Erres Massacre v. Guatemala, supra, para. 245. 343 For example, those established in the United Nations Manual on the Effective Prevention and Investigation of Extra-legal, Arbitrary and Summary Executions and its model autopsy protocol. This protocol proposes guidelines and procedures for: (1) Scene investigation; (2) Laboratory analysis of skeletal remains; (3) Final Report, and (4) Repository for evidence. Cf. Case of the Mapiripán Massacre v. Colombia, supra, para. 305, and Case of Gelman v. Uruguay, supra, para. 259. 92