Frank Gust killed four women in the Rhine-Ruhr region of western Germany between 1994 and 1998. The first was a young hitchhiker he picked up in Duisburg. Two were street sex workers. One was his own aunt by marriage, whose body has never been found. At the time he was a roofer in his twenties, married and a father, living what public broadcaster ZDF later described as an ordinary middle-class life.
The case is remembered in Germany for two reasons. Investigators in different cities and two countries failed for years to see that the killings were connected, even after a Dutch profiler said they were. And people close to Gust had heard him admit to killing long before the police did. He hinted to his mother in 1994 that he had committed a murder, but she told a friend only in 1999, and it was that friend who brought in the police. The Duisburg Regional Court convicted him of four murders in September 2000 and sentenced him to life imprisonment.
Gust was born in 1969 and grew up in Oberhausen, in the Ruhr. His parents divorced, and according to a 2026 account on the streaming service Joyn, he spent much of his childhood in children's homes, with his grandmother caring for him at times. Neighborhood children bullied and tormented him, and he had no stable person to rely on. A four-part documentary released in 2021 traced his life back to his first months in an infant home, according to its producer, ITV Studios Germany.
Childhood abuse is a recurring theme in the later accounts. The 2021 documentary series covered his claim that he had been abused as a child, and a review of the series by the German television self-regulation body FSF noted that it touched on sexual abuse in his relationship with his mother, without giving details. None of these accounts is a court finding, and they are recorded here as claims made in later interviews.
The cruelty began with animals. At the age of nine, WDR reported in its regional crime series Lokalzeit MordOrte in 2022, he killed his guinea pig with a concrete slab. The Joyn account says his grandmother had told him to get rid of the animal because his stepfather was allergic to it, and describes the killing as a formative moment for him. He went on to kill rabbits, dogs and other animals. At 24, WDR said, he killed a horse for the first time.
At 13 he broke into the mortuary of the Oberhausen cemetery. WDR, Joyn and the FSF review all describe him desecrating bodies there as a teenager. The FSF review, summarizing the 2021 documentary, put the sequence in three stages: cruelty to animals, then acts on the dead, and finally violence against women.
He trained as a roofer, the trade he still practiced when he was arrested. ZDF noted that he presented outwardly as unremarkable: a working man with a job, a wife and a child.
Very little about the four women has been published in sources that could be checked for this account. German media have generally identified them by first name and a shortened surname, and the outlets do not agree on the initials. They are named here by first name only, as most German sources do.
Katherine T. was a young woman traveling by hitchhiking when she met Gust in Duisburg in September 1994. Svenja was a woman working in street prostitution in Essen in 1996. Sandra worked on the same street in 1998. Gerlinde was the aunt of Gust's wife; the 2021 documentary described a close friendship between her and Gust before she disappeared. Beyond these facts, the sources opened do not describe their lives, families or work, and nothing further is added here.
On September 8, 1994, in Duisburg, Gust picked up a young hitchhiker and told her he would drive her home. Instead he drove into the Netherlands, about 100 kilometers from her home, ZDF reported. There he raped and shot her, then mutilated the body and left it by the roadside. Dutch investigators believed that the removal of parts of the body was meant to prevent her identification. German sources identify her as Katherine T., his first victim.
The Dutch police took the case to the German public. In 1995 Dutch detectives appealed for help on the ZDF program Aktenzeichen XY ... ungelöst, but no decisive tip came in, and the investigation stalled.
Gust talked about what he had done. In 1994 he hinted to his mother that he had committed a murder, WDR reported. The FSF review says he confided in his mother and in partners, none of whom made an official report. Joyn's account says he confessed to his mother and to his partner at the time and that for a long time nothing happened. The 2021 documentary described the first killing as one he told both his mother and a girlfriend about, and said neither reacted.
The FSF reviewer noted that the failure of family members to report what they had heard raises a legal question under section 138 of the German Criminal Code, which makes it an offense in certain cases not to report a planned serious crime, but that the documentary did not explore it. No source opened says anyone was prosecuted on that basis.
Gust's life continued. He found a new partner, married her and became a father, and he tried, the documentary said, to live a normal family life.
About two years after the first killing, Gust, then 27, was working in Essen. There, ZDF reported, he picked up a woman from street prostitution, shot her and mutilated her body. The killing drew wide media attention. Several dozen police officers spent months canvassing the street for witnesses. They found a sex worker who recognized the victim, but the investigation went no further. The FSF review names this second victim as Svenja.
The third woman to die was Gerlinde, his wife's aunt. The 2021 documentary described a deep friendship between the two before she vanished without a trace. Her body has never been found, ZDF and Joyn report. The court convicted Gust of her murder along with the three others. The sources read for this account do not give the date of her death beyond placing it within the 1994 to 1998 series, or the court's findings about how and why she died.
On June 20, 1998, two years after the Essen killing, Gust picked up another woman on the same street. ZDF reported that he tortured her for hours before he killed her. The 2021 documentary described it as the first time he tortured a victim while she was still alive. The Duisburg criminal police (Kripo Duisburg) took the case and investigated for months without finding a trace of the killer.
Gust had left the bodies of his victims in places where they would be found quickly, Joyn reported. The resemblance the press saw to the Jack the Ripper killings gave him his nickname.
The four investigations ran separately. The officers working each case saw no connection to the others, ZDF said. Gust chose victims in different places, left almost no evidence and changed his method from one killing to the next.
A Dutch profiler took a different view. He connected the bodies found in the Netherlands, in Mönchengladbach and in Duisburg and concluded that a single offender was responsible for all three. At the time, offender profiling was known mainly from the United States, and the German form of it, operational case analysis (Operative Fallanalyse), was still in its early days. German investigators rejected the idea of a serial offender because the methods seemed too different.
The case later became a reference point in German police literature on exactly this problem. In 2004 the Düsseldorf detective Stephan Harbort, writing in the police journal Die Kriminalpolizei, cited the investigators' own account of the Gust case among German publications on the difficulty of linking serial killings, a failure known in the field as linkage blindness. That account, by K. Engler and H. Ensink in the journal Der Kriminalist in 2000, described 17 months of investigation leading to Gust's conviction.
The break came from inside his family. In the summer of 1999, ZDF reported, a young woman went to the police with an unusual account. Her father's new wife had told her that her son had confessed to having killed a hitchhiker "by accident." The son was Frank Gust. WDR's account of the same chain of events is that his mother, who had heard the hint in 1994, told a friend in 1999, and the friend brought in the police.
Within a few weeks, investigators had connected the killings to Gust. He was arrested in 1999 in Bottrop, near Oberhausen, at the age of 30, according to the TV magazine prisma. Confronted with the allegations, he confessed step by step, ZDF reported.
Gust was tried in Duisburg in 2000. Parts of the proceedings were filmed by television cameras, the FSF review noted, and he was very willing to talk, which helped make him a media figure after the trial.
On September 21, 2000, after eleven days of trial, the Duisburg Regional Court convicted him of four murders, one of them combined with rape, and sentenced him to life imprisonment. ZDF reported that he said he was satisfied with the verdict and was quoted as saying that it was good that he would never get out again.
The published accounts disagree about what else the court ordered. A dpa photo caption in the Stuttgarter Zeitung in 2020 and a 2016 prisma article both say he was sentenced to life with subsequent preventive detention (Sicherungsverwahrung). The FSF review in 2021 and ITV Studios Germany, the producer of the 2021 documentary, both say no preventive detention was ordered, and ITV Studios adds that this is why his release is possible. None of the sources that could be read for this account says that the court also ordered his committal to a psychiatric hospital. The judgment itself was not available.
Gust has served his sentence at Werl prison (JVA Werl) in Westphalia. While there he married; the criminologist Petra Klages, who worked extensively with him, attended the small ceremony in the prison's visiting room, according to her publisher. She has said that Gust and his wife wanted her interview book to correct false reports and rumors about him.
Gust once said he wanted to stay in prison until he died because he saw himself as a danger to others. He has since changed his mind, Joyn reported in 2026, and is campaigning to be released. He has had accompanied day release since 2020. The 2021 documentary said that his lawyer was already preparing for a release in a few years. The FSF reviewer wrote that the series' speculation about a possible release was a strong source of fear.
Gust has been the subject of many television programs. The FSF review lists a ZDF 37 Grad documentary titled Die Hölle in mir in 2001, a long Der Spiegel article in 2005, a VOX documentary called Das Böse nebenan in 2010, and a special of Aktenzeichen XY in 2018 with the criminal psychologist Lydia Benecke. ZDF returned to the case on Aktenzeichen XY ... gelöst on November 28, 2018, under the title "Auf der Spur des Serienkillers." His mother, Dagmar Eichhorn, spoke about him on the talk shows of Markus Lanz in 2010 and Sandra Maischberger in 2012, and in the RTL II documentary Autopsie: Das Böse unter uns in 2016.
On May 13, 2021, the streaming service TVNOW (now RTL+) released Der Rhein-Ruhr-Ripper Frank Gust: Das Leben eines Serienmörders, four episodes produced by ITV Studios Germany. It used exclusive interviews and audio recordings of Gust, along with his mother, a former girlfriend, Klages, the criminal psychologist Thomas Müller, and investigators. The FSF, which reviews programs for age ratings, rated it unsuitable for viewers under 18. Its panel found the series socially disorienting and likely to desensitize younger viewers, and the reviewer, Uwe Breitenborn, criticized how much time it gave to the killer's own recordings and how much graphic detail it included.
WDR covered the case in two episodes of Lokalzeit MordOrte in September 2022, again with Benecke, discussing why he left the bodies in public places, his hopes of release and the love letters he received in prison. In May 2026 ZDF included the case in the first season of XY Spuren des Verbrechens, a new series built on cases from the Aktenzeichen XY archive.
Klages has published two books from her contact with him through Verlag Kirchschlager: a book on her correspondence with him, "Brieffreundschaft" mit einem Serienmörder, and Der Rhein-Ruhr-Ripper Frank Gust: Interviews, published in 2017.
As of May 2026, Gust remained in prison serving his life sentence, with accompanied day release since 2020, and Joyn reported that his release was not foreseeable. No court decision on release was found in any source checked in October 2026.
Proven by final conviction: four murders, one combined with rape, decided by the Duisburg Regional Court on September 21, 2000.
Preventive detention: reported as ordered by a 2016 prisma article and a 2020 dpa caption in the Stuttgarter Zeitung; reported as not ordered by the FSF in 2021 and by ITV Studios Germany. Psychiatric committal: not confirmed in any source read for this account.
The date of the first killing: ZDF gives September 8, 1994; an episode description of the 2021 documentary places the first murder in 1995.
The profiler: ZDF describes a Dutch profiler who linked the cases; a later Joyn episode description refers to an American profiler.
How the case reached the police: ZDF says a young woman reported what her father's new wife (Gust's mother) had told her; WDR says his mother told a friend, who alerted the police. The two accounts may describe the same chain of events.
Further victims: the 2021 documentary said it followed leads to previously unknown victims. No source opened records any further charge or confirmed killing.
1969: Frank Gust is born; he grows up in Oberhausen.
Age nine: kills his guinea pig; cruelty to animals follows.
Age 13: breaks into the mortuary of the Oberhausen cemetery.
Age 24: kills a horse for the first time.
September 8, 1994: picks up Katherine T. in Duisburg and kills her in the Netherlands.
1994: hints to his mother that he has killed someone.
1995: Dutch detectives appeal on Aktenzeichen XY; no decisive tip.
1996: kills Svenja, a sex worker picked up in Essen.
1994 to 1998: kills his wife's aunt, Gerlinde; her body is never found.
June 20, 1998: kills Sandra, picked up on the same street.
Summer 1999: a relative goes to the police; investigators link the cases within weeks.
1999: arrested in Bottrop; confesses step by step.
September 21, 2000: convicted of four murders by the Duisburg Regional Court after eleven trial days; life imprisonment.
2004: the case is cited in Die Kriminalpolizei as an example of linkage blindness.
2017: Petra Klages publishes Der Rhein-Ruhr-Ripper Frank Gust: Interviews.
November 28, 2018: ZDF revisits the case on Aktenzeichen XY ... gelöst.
2020: accompanied day release begins.
May 13, 2021: four-part documentary released on TVNOW; the FSF rates it 18+.
September 2022: WDR Lokalzeit MordOrte covers the case in two parts.
May 20, 2026: ZDF's XY Spuren des Verbrechens includes the case.
May 2026: still in prison and seeking release; release described as not foreseeable.