Izaskun López

Izaskun López was a woman from Baztán murdered by her husband in Logroño. Her case became a crucial link in the Tarttalo investigation: an apparently domestic killing concealed a repeated pattern of postmortem mutilation, a missing arm, and a killer’s suicide.

Identity and Discovery

Izaskun was originally from Baztán but had been raised outside the valley. Nearly three years before Amaia Salazar reconstructed the series, her husband killed her in Logroño and later died by suicide in his cell. The case initially appeared to belong to the familiar pattern of a woman killed by her partner, but the circumstances of her death connected it to murders elsewhere: her forearm had been severed from the elbow after death, and the limb was never found. Her remains were among the clean, flesh-stripped bones discovered in Arri Zahar Cave, giving investigators a physical link between killings that had not previously been treated as one case.

A Signature Hidden in a Domestic Crime

Izaskun’s murder acquired a different meaning when investigators compared it with other killings. Across the cases, women were killed by husbands or partners who then died by suicide, while the victims’ forearms had been removed after death and never recovered. The killings otherwise bore the familiar marks of domestic violence; the repeated, precisely executed amputation was the element that did not fit, pointing beyond the individual perpetrators to someone directing the pattern.

The clue was not only physical. The Logroño killer left the same identifying message found in other cases, in handwriting whose spelling was unusual enough to strengthen the suspicion of a single author behind the crimes. For investigators, Izaskun’s death was therefore both a murder and part of a larger signature: a hidden connection between apparently separate domestic killings.

The Investigation’s Wider Pattern

The cases shared a geographical thread as well as a method. Izaskun and other victims were born in Baztán but had lived elsewhere; when Amaia Salazar reviewed the series, she identified killings in Bilbao, Burgos, and Logroño among those linked by the missing forearm and the perpetrators’ suicides. Johana Márquez differed from this pattern: she had not been born in the valley and was living there when she died. That contrast helped investigators distinguish the recurring selection pattern from the details that made individual cases appear unrelated.

The connections had remained obscured in part because the cases were handled separately. Some perpetrators confessed to the killings while denying or obscuring the amputation, and the crimes were closed quickly when the offenders died. Fragmented police jurisdictions also impeded the comparison of records. Izaskun’s case thus became legible as part of the series only when investigators set its details beside evidence from other victims—an act of comparison that transformed a seemingly isolated domestic murder into evidence of a concealed, recurring crime.

Place in the Series

The chronology made Izaskun’s case one marker in a campaign that had unfolded over years: Zuriñe Zabaleta was killed in Bilbao four years earlier, Izaskun nearly three years earlier, María Abásolo two and a half years earlier, Johana Márquez just over a year earlier, and Lucía Aguirre roughly six months before Amaia Salazar reconstructed the sequence. The dates gave the pattern duration and order; the perpetrators’ suicides and the repeated removal of an arm after death linked killings that had otherwise been treated as separate crimes.

That repetition also suggested a division between the visible killers and the person shaping the series. In the broader set of cases, the husbands or partners carried out the murders, but the amputation was performed with a precision unlike the violence in their other actions, and the missing limbs were never recovered. Izaskun’s place in the chronology therefore helped investigators see the killings not merely as similar tragedies, but as a sustained pattern whose distinctive act pointed beyond the individual domestic crimes.

Forensic Limits and Uneven Proof

The link between Izaskun López and the wider series rested on accumulated similarities rather than a confirmed DNA identification from the cave: the investigators obtained a match between the remains and Johana Márquez, but could not make the same comparison for the other victims. Spain’s DNA register was still too limited to support broad matching, so a pattern that had become compelling through repeated details remained unevenly provable case by case. Izaskun’s place in the investigation consequently depended on the convergence of the evidence around her murder, not on a single forensic result conclusively identifying her among the cave remains.