Tarttalo

Tarttalo is the bestial creature invoked to explain the ritual logic behind Berasategui’s crimes, not a being whose existence the investigation independently establishes. Berasategui takes the creature’s name, and the arms he removes from his victims are understood as offerings to it. The name therefore connects calculated human violence to a monstrous figure, while leaving open whether Tarttalo has any reality beyond the belief and actions organized around it.

Name and Ritual Meaning

Berasategui’s choice of the name Tarttalo gives his crimes a symbolic frame. He does not merely arrange for other men to kill; he treats their murders as performances and himself as their director. The men who kill their wives are, in his account, actors in a work whose true author is Berasategui. Their violence is only the first stage: afterward, he takes an arm from each woman as a trophy. The distinction between the killers’ acts and Berasategui’s own role matters because it reveals a second, ritualized purpose behind the murders. The arm is not simply evidence of brutality or a keepsake; Amaia eventually understands it as an offering to the creature whose name Berasategui has adopted.

That interpretation also sharpens the contrast between method and object. Berasategui is described as a meticulous killer, yet the trophy he chooses is crude and difficult to preserve. Amaia’s explanation turns this apparent mismatch into a clue: the arms make sense when considered not only as trophies, but in relation to the cave where they are collected and the creature to whom they are offered. Tarttalo thus names the imagined recipient that links the mutilations to a specific place and gives the violence a ritual destination.

The Victims and the Pattern

Amaia’s analysis changes the central question from how Berasategui selected the men who carried out the killings to why he selected the women who died. His psychiatric work gave him access to people with behavioral disorders whom he could manipulate, helping explain how he recruited and directed his intermediaries. But that account explains the means of the crimes, not the choice of victims. Amaia insists on that distinction: Berasategui selected the women, even when other men physically killed them.

The victims share a connection to Baztán. Most no longer lived in the valley, and some died far from it, but their origins formed a pattern Amaia regards as unmistakable. Their distance from Baztán does not erase that connection; it makes the eventual return of their remains, in the form of offerings placed in a cave there, more significant. The crimes reach beyond the valley’s borders, yet the ritual draws them back toward it. Amaia compares these women to adolescent victims who also ended up as offerings in the river, extending her inquiry from a series of apparently separate deaths toward a broader pattern of victims and ritual destinations.

The Cave and the Investigative Turn

The cave is where the meaning of the severed arms becomes legible to Amaia. Until she recognizes the relationship between the trophies, their collection place, and Tarttalo, the choice of arms seems at odds with Berasategui’s otherwise controlled methods. The cave changes the object’s significance: it places the arms within an offering practice rather than leaving them as isolated signs of personal gratification. In this reading, Tarttalo is bound to a geography of violence as well as to a name. The valley is not merely where the trophies are stored; it is the place toward which the victims’ Baztán origins and the offerings converge.

The investigation’s reach across the French border reinforces the scale of the pattern without proving that Tarttalo exists as a supernatural agent. Amaia fears that Marcel Tremond may have taken his children to the same place where Valentín Esparza intended to take his daughter’s body, and wonders whether her own mother took her sister’s body there as well. She seeks permission to investigate the children’s tombs through French police channels, while her colleague advises presenting the case as a limited suspicion and keeping her family history out of the request. The possibility that a crime remotely connected to Tarttalo crossed the border makes the inquiry compelling to French authorities. These concerns broaden the case’s stakes, but they remain investigative suspicions, distinct from Amaia’s more specific conclusion about Berasategui’s offerings.

Narrative Significance and Uncertainty

Tarttalo functions as an interpretive key, not a confirmed explanation that resolves every mystery. The investigation links Berasategui, selected victims, severed arms, a cave, and the valley through material actions and recurring patterns. It does not establish that a creature received the offerings or that supernatural forces caused the murders. By distinguishing the observable structure of the crimes from the belief used to frame them, the narrative preserves uncertainty while showing the practical power of that belief: Berasategui’s appropriation of Tarttalo gives his violence a ritual form, and Amaia’s attention to the victims exposes a pattern that a focus on the male perpetrators alone would miss.

The creature’s importance therefore lies in what its name allows the investigation to see. It joins the trophy to the cave, the cave to Baztán, and the victims’ origins to the geography of their deaths. Amaia’s shift in emphasis—from the men Berasategui manipulated to the women he chose—also prevents the ritual from eclipsing the people harmed by it. Tarttalo is the shadow cast over the case; the evidence that gives that shadow shape remains human selection, human violence, and the deliberate placement of offerings.