Guardia Civil

The Guardia Civil is one of the law-enforcement bodies whose separate responsibilities shape the investigation into Johana Márquez’s murder. Its authority over that case and the transfer of her killer, Jasón Medina, coexists with other agencies’ jurisdiction over related crimes, creating barriers to recognizing connections that cross institutional boundaries.

Jurisdiction and Investigative Role

The Guardia Civil is responsible for the case of Johana Márquez, whose stepfather, Jasón Medina, confessed to killing her. When Medina was brought to court for the start of his trial, he was transported from prison under escort; he then entered a bathroom and cut his throat with a blade. Teniente Padua later explained that the Guardia Civil’s remit included both Johana’s case and the transfer of prisoners, distinguishing its responsibilities from those of the officers handling other parts of the investigation.

That division became consequential when Teniente Padua privately brought Amaia Salazar information suggesting that Medina’s crime might be linked to other murders. Although he had made discoveries based on a prison officer’s account, the official case was closed after Medina’s suicide, and his superiors considered the evidence insufficient to open a new investigation. Amaia recognized the jurisdictional obstacle: Johana’s case belonged to the Guardia Civil, while a separate murder case belonged to the Policía Nacional. The same division of responsibility that assigned cases to agencies also made it difficult to compare them.

The Guardia Civil had also searched the Arri Zahar cave, where officers found human remains belonging to at least twelve people. When Amaia sought samples for comparison with DNA from victims in apparently similar cases, Teniente Padua warned that access depended on judicial authorization and that the samples would lack evidentiary standing if they had not been collected by a criminalistics laboratory. Amaia’s immediate aim, however, was to establish a possible connection between the remains and the victims, not to present the samples as court-ready evidence. After she obtained an order from the judge, the Guardia Civil agreed to provide samples for analysis.

Case Patterns and Institutional Blind Spots

The Guardia Civil’s investigation into Johana Márquez became significant beyond the individual murder because the physical details aligned with cases being handled elsewhere. Johana had been raped and strangled by her stepfather, Jasón Medina, who confessed; her forearm, however, had been severed at the elbow, as had the forearm of Lucía Aguirre. The killer in the Logroño case had also died by suicide, and the same unusual message appeared in the cases, including with the distinctive spelling Tarttalo. Across the incidents, the same arm was amputated after death and was missing from the scene, except that Johana’s arm was later found among remains in the Arri Zahar cave. These correspondences suggested a shared signature rather than a detail explained by the separate killers’ confessions.

The pattern was not a perfect fit, and Amaia Salazar treated the mismatch as an investigative clue rather than a reason to discard the connection. In the other cases she had reviewed, the women had been born in Baztán but were living elsewhere; Johana was the only one living in the valley when she died, and she had not been born there. The other men fit a familiar profile of prolonged abuse, violence or contained aggression, often alongside alcohol or drug use. Medina did not: he had no known history of violence, and his sexual abuse of Johana distinguished his crime from the pattern, even though it did not make the shared post-mortem mutilation less striking. This exception sharpened the question of whether an outside actor had linked otherwise different domestic murders.

The Guardia Civil’s case also sat within a broader failure to join information across agencies. Two more women born in the valley had died at the hands of partners, one in Bilbao and one in Burgos; notices of their deaths appeared in funeral homes in the valley, but the available information did not establish whether either had been mutilated. Amaia argued that such cases could remain disconnected because the killings were confessed, the perpetrators sometimes disclaimed the amputations, and the cases were rapidly closed—especially when the confessed killer then died by suicide. Separate police jurisdictions further obstructed comparison, while the shame borne by victims’ families could deepen the silence around the crimes. The Guardia Civil’s remit over Johana’s murder was therefore both necessary and limiting: it made the case an official responsibility, but could not by itself resolve a pattern dispersed across closed files and multiple forces.

Access to Evidence and the Threshold for Action

The exchange over the cave remains exposed a procedural divide between a lead worth pursuing and evidence ready for court. Amaia Salazar told Lieutenant Padua that she had obtained DNA samples from victims in cases resembling those of Johana Márquez, Lucía Aguirre, and the Logroño victim. She wanted to compare them with the bones from the Arri Zahar Cave: a match could establish a series and give her grounds to seek an exhumation order. Until then, the husbands were still treated as responsible for the amputations, leaving the possible connection between the victims and the cave remains unproven.

Lieutenant Padua warned that samples not collected by a criminalistics laboratory would have no judicial value, and that without a court order the Guardia Civil could not release the bones. Amaia distinguished investigative comparison from courtroom proof: she did not yet need admissible evidence, but a result strong enough to justify the next legal step. Once she secured the judge’s order, the Guardia Civil agreed to provide the samples. Its cooperation enabled the comparison, while the conditions attached to access made judicial authorization the hinge between a suspected pattern and an investigable series.

Interagency Follow-Up

The Guardia Civil’s role in the inquiry also extended through Teniente Padua’s continuing exchanges with Amaia Salazar as she tested whether the murders might share an organizer. At her request, he used his contacts with the Policía Nacional to check whether the Logroño killer had received psychiatric care in prison and whether Jasón Medina and Ramón Quiralte had undergone therapy. The replies pointed to treatment in all three cases: a psychiatrist had spoken with the Logroño prisoner, though the report gave no name, while Medina and Quiralte had attended therapy overseen by the University Clinic of Navarra. These inquiries did not themselves establish a connection between the murders, but they opened a new line of investigation across prison and police records.

That line led to reports in which Padre Sarasola’s signature appeared without a named psychiatrist assigned to the prisoners. Amaia described them as ghost reports, and the judge noted that prison authorities had overlooked the irregularity because they were signed by a head of psychiatry. Padua’s assistance thus carried the investigation beyond the Guardia Civil’s original case file: his contacts helped expose how routine records and divided institutional responsibilities might obscure a connection that no single agency had been positioned to see.