Jurek Walter: The killer who did not kill his enemies, but everyone they loved

One winter night, in the middle of a snowstorm, a young man walks across a railway bridge on the outskirts of Stockholm. He is skeletal, frozen and sick with Legionnaires’ disease. His name is Mikael Kohler-Frost and, according to the records, he is dead: he vanished thirteen years earlier with his younger sister, Felicia, and both were listed among the last victims of Jurek Walter, the worst serial killer in Swedish history. So begins The Sandman (Sandmannen, 2012; in English, 2018, translated by Neil Smith), the fourth novel about Detective Superintendent Joona Linna, written by Lars Kepler, the pen name of the Swedish married couple Alexander and Alexandra Ahndoril. Mikael insists that Felicia is still alive, shut in a dark room by someone he knows only as the Sandman. It cannot be Jurek: he has spent thirteen years in an isolation cell, in a bunker beneath the forensic psychiatric unit of Löwenströmska Hospital, with no contact with the outside world. Joona, who arrested him, always suspected he had an accomplice. To make Jurek talk, the police place an undercover officer in the unit as a patient: Inspector Saga Bauer, of the Security Police. On October 30, 2026, Apple TV premieres Nocturne, a ten-episode series that adapts The Sandman and Lazarus and moves the story to a small town in Western Pennsylvania. Stephen Graham is Jurek; Liev Schreiber plays Jonah Lynn, the series’ version of Joona, and Zazie Beetz plays Saga Bauer, now an FBI agent. As the series has not yet premiered, this file reads the Jurek of the novels.

// The theoryThe mask of sanity

In 1941, the American psychiatrist Hervey Cleckley published The Mask of Sanity, a portrait of patients who seemed normal, even charming, and who behind that mask lacked guilt, fear and attachment. Among his sixteen traits he included one that matters here: the absence of delusions and other signs of irrational thinking. Cleckley’s psychopath is not mad; he knows exactly what he is doing. Half a century later, Robert Hare turned that description into an instrument, the PCL-R (1991), a twenty-item scale scored by a trained clinician from an interview and the case file. Its items fall into an interpersonal and affective factor (superficial charm, grandiosity, lying, manipulation, lack of remorse and empathy, shallow affect) and a lifestyle and antisocial factor (impulsivity, irresponsibility, need for stimulation, early delinquency). In 2002, Michael Woodworth and Stephen Porter studied 125 incarcerated homicide offenders in Canada and found that more than 90 % of the homicides committed by psychopaths were instrumental, planned to achieve a goal, compared with fewer than half among the rest.

// The subjectThe man in the bunker

The novel reconstructs the arrest thirteen years earlier. Joona and his partner Samuel Mendel, who had spotted an anomaly in the missing-persons statistics, reach a clearing in the Lill-Jansskogen woods, in Stockholm, and find Jurek beside an open grave, pushing an emaciated woman back into the coffin as she tries to climb out. During the interrogations they realize he gets inside the head of anyone who talks to him, and Joona goes as far as lying at the trial so that he will not walk free. Years later, at the hospital, chief physician Roland Brolin warns a newly arrived colleague, Anders Rönn, about the rule no one may break: Jurek must never be left alone with any member of staff and no one goes into his cell, because he will talk calmly and reasonably and convince whoever listens to do something they will regret. Before leaving the courtroom, Jurek had turned to Joona and whispered:

Lumi is Joona’s daughter, and Summa his wife. Jurek does not threaten: he announces, as if describing something that has already happened. Samuel’s family disappears, and Joona makes his own family pass for dead and hides them to keep them alive. That ability to read people is what makes Saga’s mission so dangerous. Spoiler: the accomplice Joona suspected does exist. In Lazarus (2018), when he is already presumed dead, the clues in a new series of crimes point to him again.

// The crackA psychopath diagnosed with schizophrenia

The series of novels contradicts itself. According to Kepler’s website, Jurek’s official diagnosis is unspecified schizophrenia, with chaotic thinking and acute psychotic episodes. But everything he does in the novels belies it: he waits thirteen years, plans every step and talks with a disarming calm. That is precisely the absence of irrational thinking that Cleckley set as a condition. Psychopathy is not psychosis, and the novel’s label seems to answer a need of the plot, which wants him locked in a hospital rather than a prison. Nor does he fit Hare’s second factor: Jurek is the opposite of impulsive or irresponsible.

Moreover, psychopathy explains how Jurek kills, without empathy, without remorse and with cold calculation, but not whom or why. His motive is revenge with a biography behind it. His father, a Soviet astrophysicist, fled to Sweden with his two sons and ended up working in a gravel pit. Social services took the boys away, and Jurek was deported. When he came back with his brother, their father had hanged himself. In 2010, Jennifer Skeem and David Cooke warned against the circular reasoning of confusing the trait with the behavior, as if someone killed because he is a psychopath and were a psychopath because he kills. Explaining is not excusing.