: Operational name: Sergio Medina Martínez, alias “el Bolchevique” (the Bolshevik). He joined the Army in 1975 but was discharged in 1981 for marrying without authorization. While he was in the process of seeking reinstatement, he was offered a position as a civilian employee with the CNI at the end of 1984.

He was a guard at República and was assigned to the green unit at Borgoño in 1985. In 1988, he joined the Apache or reaction unit. His team consisted of Pamires and Chepo. His office was in the guard unit of the Borgoño Barracks.

His unit moved in 1989 to the barracks at Grajales and República. In July of that year, he participated in the surveillance of Jécar Neghme, at the request of Sanhueza Ros. In 1991, he requested his voluntary discharge.

Source: Book: "La Trampa" (Ed Lom), 2018

Case No. 1.643; qualified homicide case of Tucapel Jiménez Alfaro hhh) Statement of Jaime Segundo Silva Ratz from page 954, in which he states that he was part of the Reaction Unit known as “Apache” and that in 1989, after the entire unit had moved to Grajales and República, more or less in July, after having taken medical leave and while his team members were outside of Santiago, he remained on standby at the barracks.

He was then requested by an officer named Ramiro –Sanhueza Ros– who was the interim chief of the Green and Blue Brigades investigating the MIR and the FMR, to accompany them, along with the driver known as “Vitoco,” heading toward the Plaza de Maipú, a place where they remained for more or less an hour.

Meanwhile, over the radio frequency, the surveillance of a person could be heard, distinguishing the voice of an agent nicknamed “Cordillera” who was addressing “Telele,” and the latter mentioned to him that he was near “Olafo.” He says that they then moved to the Templo Votivo de Maipú, specifically to Calle Olimpo.

There, Ramiro instructed him to get out of the vehicle, telling him to follow a person who was walking along a street about 150 meters away and whom he only saw from behind. He says that Ramiro ordered him not to lose sight of him until the subject entered one of the alleys in the neighborhood; he ran so as not to lose him, and when he turned into the alley where the person had walked, he encountered the vehicle in which he was traveling, and Ramiro ordered him to get in immediately.

He notes that he was dropped off at his home, with the warning that it was likely he would be requested again the following day, an event that indeed occurred, heading to the Plaza de Maipú along with Vitoco, where they stayed for approximately an hour, later hearing that the person was in downtown Santiago, so they returned to the barracks.

He states that one or two weeks later, through the press, he learned of an alleged confrontation between a MIR leader, Jécar Neghme, and security forces, which had culminated in the latter's death. He says that based on the information provided, he associated him with the person for whom he had been asked to provide surveillance support.

He adds that this leader carried out his work in the public eye and, for that reason, did not constitute a figure of much political relevance to anyone.

Source: Judiciary, August 5, 2002