Karabineros Raúl Ávila, Carlos Alarcón, Braulio Valenzuela and Patricio Sepulveda they were formalized in the Catrillanca case, which are currently in pre-trial detention.
According to the information provided by the Office of the Prosecutor, Carlos Alarcon will be the author of the strike which ended Camilo's life on November 14 last year.
It is true in the latest testimony that the former sergeant Alarkon gave the key points to the investigation.
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On November 17, Alarcón suggested, complementing his previous testimony: "After we transferred the third obstacle, I had to run about 15 meters when I find myself face to face with a blue tractor, driven by one object and was accompanied by another.
"The driver saw his face and confessed that he had a mustache, a companion head was covered with something. I found him in front of him, at a distance of not more than 10 or 12 meters, and (…) The first thing I did was to intimidate him to stand up, referring to the vehicle with my official weapon ".
Alarkon added that he had done this because, as they progressed, they received information from a helicopter that flew over the surface that "three subjects occupied stolen vehicles and boarded a tractor."
"They ignored me and continued the march (…) When we met, you said phrases like "stop, carabiner, stand there". However, the maneuvering of the tractor was short and advanced immediately, leaving me close to the curve.
"Then I decided to bring, I do not remember exactly whether four or five, tractor-directed shots. I am sure that I pointed to the lower surface of the tractor, without it being possible to determine whether the right or left zone, but the back part, which was like a metal shovel.
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"My idea was to get them to stop. The area where I fired was a safe shooting area"Says the testimony, according to La Tercera.
After this, the tractor stopped on the side of the road. According to Alarkon, the teenager has gone down, identified as MAPP, with her hands, simultaneously with he could see Camilo with a wound on his head.
While stressing that during this intervention they were "targeted at various locations," neither Cathrilanka nor the adolescents who accompanied him were armed.
"The people who were on the tractor did not shoot at us"He assured.
Raúl Ávila, another of those formalized from the crimes of simple murder and attempted murder, was one who later reduced MAPC.
The four formalized are currently in pre-trial detention, at least for the duration of the investigation.