Days before the murder, Hans Pozo spent the night with four men at a shelter at Paradero 30 on Santa Rosa Avenue. When they were separately interviewed by the Homicide Squad, all mentioned the surname "Martínez".
Forensic entomology carried out by the Carabineros' Criminalistics Laboratory determined that the killer had refrigerated the remains before dumping them in various areas around the city. The fly larvae present in Pozo's remains had the same level of development. Furthermore, due to the size of the victim's body, it was deduced that it could not have been kept in a domestic refrigerator, but an industrial one. This led the investigators to 41-year-old Jorge Iván Martínez Arévalo, an official from
La Pintana and owner of an
ice cream parlor located next to his home, also at Paradero 30 in Santa Rosa. When the authorities went to Martínez's house to question him, he was not there, so he was summoned to testify. This version was refuted by Martínez's relatives, particularly his brother and colleague, Robinson, who claimed that the Carabineros entered the house and shot Jorge twice. After Martínez's death, his wife found a twenty-page suicide note at his home, in which he explained the relationship he had with Hans Pozo. In the note, Martínez claimed that Pozo was extorting him, threatening to reveal that Pozo was Martínez's biological son to his family. Martínez regularly gave Pozo money, believing that Hans was his son. In 1984, he had had a brief relationship with a blonde woman. However, after his death, a
DNA paternity test was performed and ruled out any relation between the two men. What inspired him to write the note was an alleged extortion by the hired killers, who were demanding more money from him for their work. On May 3, 2006, the OS9 group collected biological samples from Martínez's ice cream parlor. There, using
luminol, a blood stain that had been washed off was detected. The stain corresponded to Pozo, and by its shape, it was deduced that the corpse had lain there after having been shot. Later, Martínez's brothers, when questioned by prosecutor Sabaj, assured the press that they had been wounded at one point and that the blood was theirs. They also denounced the Carabineros, claiming that they tried to implicate them in Pozo's death, which they flatly denied. More blood samples were found in Martínez's van, specifically in the passenger seat and the back seat, == Funeral ==