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Netflix's new four-part true crime docuseries, titled The Breakthrough, is a fictional narration of the 2004 double homicide that took place in Linköping, Sweden. After 16 years, the double murder of Mohammed Ammouri and Anna-Lena Svensson was finally solved with the help of commercial genealogy.
This case remains the first one in Sweden that was cracked with the help of ancestorial DNA, as per a May 2021 report by Linköping University in Sweden.
The double murders in Linköping to date remain the second largest investigation in Swedish history, as also showcased on The Breakthrough. The names of the victims, the murderer, and other case-related characters have been changed in the docuseries, but the plot remains the same.
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The four-part miniseries, The Breakthrough, premiered worldwide on January 7, 2025.
5 key details about Mohammed Ammouri and Anna-Lena Svensson's murder as Netflix drops The Breakthrough
1) The unknown assassin cut Mohammed Ammouri's throat
As reported by The Local Sweden, dated October 20, 2004, Mohammed Ammouri and Anna-Lena Svensson were stabbed to death by an unknown attacker on the morning of October 19, 2004. The double homicide took place in Linköping, Sweden.
Ammouri, just eight years old, was on his way to school when he was gutted, as also showcased on The Breakthrough. He died on the spot. Svensson, who was going to work, was also stabbed by the unknown assassin several times. The Local Sweden reported that she was discovered by a bush, with stabs on the stomach.
The eight-year-old was lying 15 meters away from Svensson with a cut-throat. Svensson was taken to the clinic and died while the surgeons were operating on her.
2) The murderer did not flee the scene and used a butterfly knife
The Local Sweden reported that the killer used a butterfly knife to kill his victims, as also demonstrated in The Breakthrough on Netflix. The witnesses who were at the scene told the authorities that the killer "did not run but strolled away from the murder scene."
According to the witnesses, the murderer was in his twenties, around 180 cm tall, and dressed in a knee-length jacket and black woolen cap.
3) The case took more than 15 years to crack
As per The Guardian, Daniel Nyqvist was arrested in 2020 for the murders of Mohammed Ammouri and Anna-Lena Svensson. The police "matched his DNA on a popular genealogy website," after which the authorities finally concluded that the killer was Daniel Nyqvist.
The same news outlet reported that Nyqvist confessed to the crimes and stated that there were voices inside his head that made him do the killing. He also mentioned to the authorities that after committing the double murder, he was horrified. He stated:
“I remember that I didn’t brush my teeth because I was just going to die or get caught that day. But I had to do it. I did it mostly on automatic."
4) There was no connection between the murderer and his victims
As per The Local Sweden, when the investigations started, it was discovered that the victims were strangers. The police speculated that the murderer had no relationship with the victims and was mentally sick, attacking random people, as also revealed on The Breakthrough on Netflix.
Concerning the same, Inspector Tommy Håkansson told the local media:
"It's probably someone mentally sick or someone who thinks they have another reason for the killings."
The locals were also asked to stay indoors by police press officer Pia Thevselius, who stated:
"We have a man out in town who has murdered two people. To some extent you have to make your own decisions about safety and whether you will stay indoors until we arrest the attacker."
5) Daniel Nyqvist was sentenced to psychiatric care for an indefinite time
Although Daniel Nyqvist admitted to the murders of Mohammed Ammouri and Anna-Lena Svensson, the police found no motive behind them, and nor did the jury. He was, hence, sentenced to psychiatric care for an indefinite period.
As per The Guardian, Johan Ritzer (Daniel Nyqvist's lawyer) revealed to the court in September 2020:
"Daniel was suffering from a serious psychiatric disorder at the time of the murder. It caused obsessive thoughts about killing two people and he acted on these thoughts. He had limited ability to control his actions."
All four episodes of The Breakthrough are now streaming on Netflix.
