phenomena of forced disappearance, by which they are entitled to have the facts investigated and the responsible prosecuted and punished.118 The Court has recognized that the right to the truth of the relatives of victims of serious human rights violations is framed within the right to access to justice.119 155. In that same connection see, the Inter-American Court has stated that: the right to know the truth represents a necessary effect for it is important that a society knows the truth about the facts of serious human rights violations. This is also a fair expectation that the State is required to satisfy, on the one hand, by means of the obligation to investigative human rights violations and, on the other hand, by the public dissemination of the results of the criminal and investigative procedures. The right to know the truth requires from the State the procedural determination of the patterns of joint action and of all those who participated in various ways in said violations and their corresponding responsibilities. Moreover, in compliance with the obligation to guarantee the right to know the truth, States may establish Truth Commissions, which can contribute to build and safeguard historical memory, to clarify the events and to determine institutional, social and political responsibilities in certain periods of time of a society.120 156. In first place, the Commission considers that in cases such as this it is incumbent upon the State to show that its officials proceeded diligently with their inquiries after being informed that a person was missing. According to information from the State, the commandant of Puerto Naré Police Station reported that "they were informed of the incident around 2:20 a.m. by Mr. Evelio Rúa, who, noticed something amiss as he was passing the jail because the gate was open…”121 In spite of that, the State has not provided information about any specific steps immediately taken to establish Mr. Isaza Uribe’s whereabouts and protect his life and well-being, especially given that he had disappeared while in State custody. 157. In second place, although the Commission does not have the records of the domestic proceedings available to it, it notes from information supplied by the parties that the criminal proceeding was beset with unwarranted delays. The regular courts opened an investigation on November 19, 1987, which was suspended 10 years later in August 1997, after making no progress in clarifying the facts. Thereafter, the investigation remained closed for 13 years until 2010, when it was ordered reopened. 158. The Commission observes that as of the date of adoption of this report, 27 years after the incident occurred, the facts have still not been clarified and the criminal investigation remains at the preliminary inquiry stage. The State has not provided an explanation justifying those protracted delays and lack of initiative. The State argued that the case was a complex one; however, the Commission finds that it has not explained what specific bearing that supposed complexity had on the fact, for example, that the investigation was suspended for 13 years. In that regard, the Commission considers that the State has allowed excessive delays in the investigations and that those delays are not based on the complexity of the matter but on lack of initiative and diligence on the State's part. 159. Third, the information available indicates that arrest warrants were only issued for four persons in September 1995, two of whom, according to the petitioners, were named as members of the MAS paramilitary group. That month, the Medellin Regional Prosecutor's Office refrained from ordering pretrial detention on the ground that there was no compelling circumstantial evidence of responsibility. Since then no one else has been included in the criminal investigation proceedings, nor have investigations being conducted 118 I/A Court H.R., Case of Blake. Guatemala. Merits, Judgment of January 24, 1998. Series C, No. 36, par. 97. I/A Court H.R., Case of Anzualdo Castro v. Peru. Preliminary Objection, Merits, Reparations and Costs. Judgment of September 22, 2009, Series C No. 202, par. 118. 119 120 I/A Court H.R., Case of Anzualdo Castro v. Peru. Preliminary Objection, Merits, Reparations and Costs. Judgment of September 22, 2009, Series C No. 202, par. 119. 121 Annex. State’s communication of April 22, 2013.