Warning: This article contains spoilers for The Breakthrough.The Breakthroughbegins with the double murder of Adnan Abbas and Gunilla Persson, but ultimately ends with their killer being caught. Based on the book by Anna Bodin and genealogist Peter Sjölund of the name,The Breakthroughwas inspired by a true crime.The Netflix miniseriesis a fictional account of the second-largest murder investigation that took place in 2004 in Linköping, Sweden.
Directed by Lisa Siwe withThe Breakthrough’s castled by Peter Eggers as Detective John Sundin, the show delves into the shocking double homicide of Adnan Abbas and Gunilla Persson. Throughout its four episodes, the Netflix series sees the police struggle to find the person who was behind the murder. However, that changes when the lead detective decides to seek the help of Per Skogkvist, a genealogist who solves the crime by creating a family tree using the killer’s DNA.

Who Killed Adnan Abbas And Gunilla Persson In The Breakthrough
David Nilsson Was The One Who Was Behind The Gruesome Murders Of Adnas And Gunilla
While on his way to school, Adnan, a seven-year-old boy, was brutally murdered in broad daylight.Gunilla Persson witnessed the crime and tried to intervene, but the killer stabbed her, and she died at the hospital. The police were confident that they would be able to find the perpetrator because it seemed like a clear-cut crime, more so because there was a witness who saw everything unfold and got a good look at the murderer. Unfortunately, it took 16 years for Adnan and Gunilla’s killer to be put behind bars.
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There wasn’t much to find at the crime scene where the murders occurred, but fortunately, the weapon used to kill Adnan and Gunilla was left behind. The police recovered blood from the knife, but they couldn’t match the killer’s DNA with anyone else in their database. While the police did their best to catch the killer, it took the help of a genealogist to help them figure out that it wasDavid Nilsson, a young and troubled man, who had brutally murdered Adnan and Gunilla.

How The Police Managed To Catch The Killer At The End Of The Breakthrough
The Police Finally Caught The Killer 16 Years After Gunilla And Adnan Were Murdered
When the police started investigating Gunilla and Adnan’s murder, it seemed like it would be easy to catch the killer. They had the murder weapon and a witness who had seen the killer’s face. All they had to do was fit all the pieces of the puzzle together and the case would be solved. However, that was easier said than done. They hit a roadblock when they couldn’t find a match for the DNA on the knife they had recovered, despite swabbing thousands of young men who had been living in the area at the time of the murder.
Despite having a psychological profile of the killer, who was described as a male aged between 15 and 30 with violent tendencies, they had a difficult time finding him.Karin, the woman who had witnessed the crime, couldn’t remember the killer’s facedue to the trauma that came as a result of seeing something so terrifying and gruesome. Karin did eventually remember the murderer’s face and the police drew a sketch of him, but no one knew who he was.

Episode 4
“A Lonely Person”
Before Detective John knew it, 16 years had passed without a real lead. One day, the detective was reading something on the internet when he came across a website about genealogy. He contactedPer Skogkvist, a genealogy professor, who was confident he could locate the killer by creating a family tree using his DNA. While Per made some progress, his job was made more difficult because none of the DNA samples they had could be linked to the killer. A breakthrough came when Stina Eriksson was swabbed and Per discovered that she was Nilsson’s cousin.
Why David Nilsson Killed Adnan And Gunilla In The Breakthrough
After Per managed to pin down David as the person who murdered Adnan and Gunilla, he was brought in for questioning at the police station, and they took his DNA, which was the perfect match with the one found on the murder weapon. When he was asked why he killed Adnan and Gunilla, he explained that the only way to quiet his mind and have peace was by killing two people. The opening scene ofthe Netflix true crime seriesdepictsDavid typing on his computer that he “must kill”. So, when he found Adnan and Gunilla, he murdered them in cold blood.
He was a lonely man who had little contact with the outside world except for the few times he corresponded with his brother.

David’s explanation for why he only killed Gunilla and Adnan makes sense because he knew that Karin had seen him murder them, yet he ran away and let her walk free. He was a lonely man who had little contact with the outside world except for the few times he corresponded with his brother. SinceDavid admitted to being the one behind the murder, he was ultimately convicted of the crime.
What Happens To Detective John Sundin In The Breakthrough
Detective John Stundin Decided To Get To Know His Son Better
At the time of Adnan and Gunilla’s murder, Detective Sundin’s wife was pregnant. Because he was the lead investigator, he put his family aside so he could focus on finding the killer. Seeing as he had promised Adnan’s parents and Gunilla’s husband that he would find the perpetrator, the detective dedicated his life to that purpose. So, when he ultimately found the murderer, he felt at a loss about what the rest of his life would be like.
Given that his personal relationships had taken a backseat to his career, he decided that he would spend his remaining days reconnecting with his son, Henry, who he didn’t have much of a close relationship with.

The Breakthroughseason finale also sees John visit Adnan and Gunilla’s families to tell them that he had fulfilled his promise to them. Given that his personal relationships had taken a backseat to his career, he decided that he would spend his remaining days reconnecting with his son, Henry, who he didn’t have much of a close relationship with. John and Henry didn’t really have a lot in common, but they settled on going diving together so they could get to know each other better.
What The Breakthrough’s Ending Really Means
Justice Ultimately Prevailed
The Breakthroughdepicts a really tragic story of the murder of a young boy and an innocent woman, so it’s satisfying that the person who killed them was put behind bars. Although it took years for the culprit to be caught, Adnan and Gunilla’s family finally found peace even though they will never get over having the people they love being taken away from them in such a gruesome way. InThe Breakthrough’s finale,Detective John was able to have a life outside of work because he had achieved his goal of arresting the person he had spent years fixating on.
The Breakthrough
Cast
The Breakthrough is a crime drama that follows a detective joining forces with a genealogist to solve a 16-year-old double homicide before it becomes a cold case, piecing together the mystery in a race against time.