The husband hid in his study, setting up an old cell phone—the scene captured on the camera would stay with him forever: his wife first drank a sip of his water, then poured the liquid from the small bottle into it.
Late 2018, Sweden. Mr. Tang and Ms. Jin were both highly educated elites, graduates of prestigious universities. After immigrating to Sweden, they had three children, a house, a car, and all the children they needed—a model Chinese family envied by everyone.
The turning point came with a medical checkup. An abnormal enzyme level in Mr. Tang's blood, along with a CT scan, revealed small nodules simultaneously growing on his lungs, kidneys, and lymph nodes. Doctors ruled out genetic factors and diagnosed him with sarcoidosis, attributing it to an immune abnormality. Mr. Tang was under 40, loved fitness, ate healthily, and was physically strong—no one could understand why it was him.
Initially, the treatment was effective. A follow-up checkup in March 2019 showed that his levels had returned to normal. The doctor said he could stop medication in another six months.
However, the situation took a sharp turn for the worse a few months later. He began experiencing fatigue, a dry cough, frequent urination, and sluggish muscle responses; he couldn't even finish a 20-minute video conference. Colleagues noticed him dozing off at his desk early in the morning. The doctor attributed it to psychological stress and medication side effects, and besides continuing the medication, no further tests were conducted.
Mr. Tang began documenting his illness online—test results, medication types and dosages—simply to keep a record in case he changed doctors later. He never imagined that this diary would become the most complete victim record in court seven years later, and that while he was writing it, his partner had already quietly laid a trap.
At a food festival in September 1999, Mr. Tang bought his favorite spicy beef. One bite, and it tasted bitter. He asked his wife to try it, but Ms. Jin didn't eat a bite, only advising him not to argue with the restaurant over such a small matter.
A week later, at his follow-up appointment, the doctor recommended a full blood test. The results shocked everyone: his glomerular filtration rate was less than half the normal value, indicating chronic kidney disease; his blood calcium level was a staggering 3.97 mmol/L—above 3.5 mmol/L is considered severe hypercalcemia, enough to cause arrhythmia, acute kidney injury, or even sudden death.
That night in the hospital, the heart rate monitor's alarm never stopped; at its lowest, his heart rate was less than 30 beats per minute. The night shift nurse had to check on him every few minutes. Mr. Tang later said that he owed his survival not only to luck but also to his naturally good health.
Further tests revealed that his vitamin D3 levels were nine times higher than normal, and his vitamin D2 levels were twelve times higher than normal. This was highly unusual—most commercially available calcium supplements use vitamin D3, while vitamin D2 is usually only found in prescription supplements, and a thorough review of his medical records showed that his doctor had never prescribed such medication.
Before this question could be answered, Mr. Tang was hospitalized again due to severe arrhythmia—a grade III atrioventricular block, where his atria and ventricles beat independently, posing a constant risk of sudden death without a permanent pacemaker. Less than a year ago, he could run marathons, and suddenly he was tied to a pacemaker for life. Unwilling to accept this, he traveled to several Nordic countries for consultations, even sending his medical records back to Beijing, Shanghai, and Chengdu for consultations. The conclusion was consistent: a pacemaker was strongly recommended, but recovery was possible if his blood calcium levels could be lowered.
After more than a month of hospitalization, his indicators finally returned to normal, and his arrhythmia subsided. The doctor agreed to postpone pacemaker implantation for six months of observation. However, more than a month after discharge, two follow-up examinations showed that his vitamin D3 levels were slowly rising again.
In April 2020, the same symptoms returned, with his blood calcium level soaring to 4.11, even higher than before. This time, the examination revealed that he had only 40% of his kidney function remaining, meaning one kidney was already damaged beyond repair, and the other was also in critical condition. His heart condition worsened, causing him to faint multiple times due to bradycardia, requiring injections of large doses of adrenaline to stimulate his heartbeat.
A week after being discharged, he stewed beef to nourish his body. Halfway through the meal, he returned from the restroom to find the beef bitter, and even the accompanying cola was unpalatable. His heart sank, and he put down his chopsticks. That afternoon, he experienced excruciating pain and weakness, feeling as if he had been run over by a truck. At his follow-up appointment the next day, his blood calcium levels were again dangerously high, requiring another hospitalization.
For several months, his blood calcium levels fluctuated wildly—strangely, they were controlled during each hospitalization, only to spike again upon returning home. Doctors initially suspected it was due to poor diet and insufficient water intake at home. Mr. Tang felt wronged: he drank nearly seven liters of water daily, and his legs were practically worn out from going to the toilet so often.
As of August 2020, he had been hospitalized more than ten times, leaving him physically and mentally exhausted. Repeated intravenous infusions caused swelling in his hands and feet, and his arms were covered in needle marks and bruises. Doctors had to implant a PICC line in his large vein, connecting directly to his heart, for easier medication administration, but this made even bathing difficult.
The treatment consistently failed to meet expectations, and the home treatment plan was extended from one or two months to a year, but his blood calcium levels never truly stabilized. He contacted experts at a top-tier hospital in Taiwan through online consultations. One doctor raised a crucial question: such high-dose, long-term intake must be exogenous—are there any abnormally high levels of Vitamin D in the food you eat, the supplements you use, or even the water you drink?
Two other endocrinologists took over and asked a question no one had ever asked before: are your wife and children's blood calcium levels high?
This question stunned Mr. Tang. His family lived and ate together; why was only his level so high?
He remembered the strange allergic reaction he had experienced a few months earlier. One evening in January 2021, as prescribed, he received a calcium-removing injection via a catheter. Afterwards, his wife, as usual, helped him flush the catheter with saline solution—a procedure they had performed many times without incident. But this time, the moment the saline solution was injected, he instantly felt a scorching hot wire piercing his heart; his skin burned, his whole body ached, and his heart raced. He told his wife to stop and call for help, but when he looked up, he saw Ms. Jin standing motionless, saying she didn't have the doctor's phone number. Too painful to speak, he handed his phone to his wife, asking her to call the emergency number at the nurses' station—the line went on for a long time, and Ms. Jin said no one answered. He then asked her to call ambulance, but Ms. Jin said she didn't know the number.
Finally, he struggled to dial Sweden's 112 emergency number himself. When the paramedics arrived, his symptoms came and went quickly; by the time he reached the hospital, he was perfectly fine. The doctor diagnosed an acute drug allergy and sent him home that night.
A few days later, the nurse visited as usual. After hearing his story, she was surprised, saying that in all her years of medical practice, she had never heard of anyone being allergic to saline solution. The nurse later specifically advised that he should flush the tubing himself and not delegate it to someone else—as she said this, her expression was strange, hesitant, and she also took away the remaining unopened bags of saline solution from the house.
Mr. Tang initially didn't think much of it, until the doctor's words later made him realize, recalling how his wife had hesitated to call an ambulance that night, that his calcium and vitamin D levels might really be related to his wife.
From then on, he became very careful about his food and water intake. Since becoming ill, his wife had already arranged for them to sleep in separate rooms and eat separately, citing differences in taste and schedules, which ironically made it easier for him to handle his own meals.
One afternoon in July 2021, he was in a hurry to use the restroom and carelessly left his half-empty water bottle on the table. When he returned, he found the cap wasn't tightened properly—unusual for a meticulous person like him. He looked around. His two children were playing games and watching cartoons in the living room, their heads barely looking up. His eldest daughter had already gone out to play with her classmates. The only one who could have touched the bottle of water was his wife.
From that day on, after finishing his water and tightening the cap, he would use a small knife to carve an inconspicuous mark on the cap and the bottle. After a few times, the line indeed became misaligned, and the water level in the bottle was always slightly higher—almost unnoticeable unless you looked closely.
He found an old cell phone, hid it in the study, pointed the camera at the water bottle on the table, and then casually went downstairs to play with his children. Not long after, another phone beeped: moving object detected, automatic recording initiated.
He witnessed a scene he would never forget: Ms. Jin, dressed in casual clothes, took a small brown bottle from her pocket, opened his water bottle, took a sip herself, poured the entire liquid from the small bottle into it, and screwed the cap back on. Then she picked up a larger bottle of water, poured in another small bottle of unidentified liquid, and shook both bottles upside down—the whole process was practiced and fluid, as natural as tasting the saltiness of a dish. She even took a sip of the cola lying nearby.
Later, Mr. Tang realized that his wife had taken a sip before adding the drug because the bottle was already half-empty; adding the drug directly would change the taste and arouse suspicion.
The one who poisoned him was his own wife, with whom he shared a bed. Mr. Tang felt like the sky had fallen, but thinking of his two young children, he couldn't bring himself to call the police. He endured until the next day when the nurse made her routine check-up. But right under the nurse's nose, Ms. Jin brazenly continued to add the drug—this scene was also captured on a hidden camera.
Unable to tolerate it any longer, Mr. Tang arranged to meet the doctor through the nurse, played the secretly filmed video in person, and brought the drugged water with him. Test results showed the water contained high levels of Vitamin D, a situation neither of the two attending physicians had encountered before, and they advised him to immediately call the police.
After taking over the case, the police, fearing Ms. Jin might discover the problem and flee back to China, instructed Mr. Tang to pretend nothing was wrong and return home to wait. Late that night, after two days of intense anxiety, he collapsed into a deep sleep, fully clothed. In a daze, he heard someone push open the bedroom door—his heart skipped a beat, thinking his wife was about to attack again, but when he looked up, he saw a policeman standing in the doorway: Ms. Jin had been arrested.
Ten days after her arrest, Ms. Jin was released because the case was still under investigation and she had not yet been convicted. That evening, she and Mr. Tang had a conversation, which Mr. Tang recorded. In the conversation, Ms. Jin admitted to drugging her husband, but claimed it wasn't Vitamin D, but rather a "potassium supplement"—because the doctor had said Mr. Tang's potassium was low and suggested eating bananas to supplement it, she felt bananas weren't enough, so she secretly added water-soluble potassium chloride and potassium citrate to the water online, saying, "I was doing it for your own good."
Mr. Tang immediately retorted: "Then why did the doctor and police both test positive for Vitamin D?" Ms. Jin couldn't answer, and instead accused him of being stubborn and giving her attitude, finally declaring: "My lawyer said, don't just hand over your things to others."
The real motive behind the case was later attributed in court to money and sex. Ms. Jin was simultaneously involved with at least three men, all middle-aged men in the Swedish Chinese community. None of them testified at crucial moments in the trial; only explicit, ambiguous text messages were presented in court.
As for the money, it involved the five-bedroom apartment worth 11 million Swedish kronor—the mortgage payments had been made from Mr. Tang's account. During the investigation, Swedish mortgage rates skyrocketed, with monthly payments soaring from over 10,000 kronor to 40,000 kronor. Mr. Tang's business income was unstable, making the mortgage burden immense for him alone. He suggested his wife move back in to help with the mortgage payments, or only pay the interest, or even sell the apartment and split the profits. Ms. Jin refused all of these suggestions, only proposing a property division agreement through her lawyer—each keeping their savings separately. Mr. Tang's income, aside from mortgage payments, was almost entirely handed over to household expenses. If this agreement were followed, his money would remain his wife's, and her money would remain hers.
What chilled him even more was that this agreement had been drafted in June 2021—precisely during the time he was being poisoned and suffering greatly. The agreement also stated that "in the event of death of one party, the property shall belong to the other party." Ms. Jin's lawyer even possessed an IOU claiming Mr. Tang borrowed 750,000 kronor, but the signature was clearly forged.
Mr. Tang resolutely refused to sign, gritting his teeth and shouldering the mortgage payments. Upon learning that Ms. Jin had applied to Google for a transfer to the US, he completely snapped, posting the entire incident on an overseas Chinese forum, warning fellow Silicon Valley residents to be wary of a "Swedish Pan Jinlian." The post caused a huge uproar. Netizens revealed that Ms. Jin was already active in several large Silicon Valley Chinese groups, frequently posting meticulously edited photos; her LinkedIn profile was also exposed as carefully crafted, suggesting her actual work was more akin to customer service and sales. Public opinion seemed to have an effect—Ms. Jin ultimately failed to transfer to the United States.
Ms. Jin was no pushover either. She sued Mr. Tang in Sweden for defamation, forcing him to delete his posts, while simultaneously launching a media counterattack, exposing Mr. Tang's marital infidelity, preference for sons over daughters, and emotional abuse, even accusing him of swindling money from her family. Online public opinion quickly split into two camps.
In the first half of 2024, the couple completed divorce proceedings, sold their apartment, and each received approximately $300,000. Just as they were catching their breath, Mr. Tang received more bad news: the prosecutor decided not to file charges. The blow of three years of waiting in vain caused him, who already had heart problems, to be hospitalized again. Ms. Jin, seizing the opportunity, countersued Mr. Tang for domestic violence and sought full custody of their two children.
A turning point came at the end of 2024. The original prosecutor retired, and the new prosecutor, Anna, took over the case. While organizing the materials, she discovered a large amount of evidence obtained during the 2021 incident, which had been sealed untouched in the files—especially a large number of Chinese conversation records, which hadn't even been translated. Anna unlocked Ms. Jin's phone, reconstructed her chat history with multiple lovers, and obtained the forged will and IOU from their lawyers. With this evidence, she decided to reopen the case.
In March 2026, Ms. Jin was arrested for the second time, this time directly detained pending trial on charges of attempted murder. Before the murder trial, Ms. Jin's defamation lawsuit against Mr. Tang was decided—she won. The reasoning was that even if the post didn't name names, as long as the outside world could infer the identity of the person and it caused an impact, it constituted defamation.
This victory gave Ms. Jin's side confidence, believing that the murder case could be handled similarly. They didn't expect that the prosecution was well-prepared this time, releasing the secretly filmed poisoning videos at the start of the trial. Ms. Jin maintained that she had administered potassium supplements, claiming she wanted to help her husband recover before bringing up divorce while he was ill, fearing it would seem heartless—a logic that even her lawyer seemed hesitant to use.
The prosecution called two attending physicians to testify: Ms. Jin not only administered large doses of Vitamin D to her husband but also supplemented him with large amounts of calcium, simultaneously promoting absorption and increasing intake—a two-pronged approach that doubled the effect. Two seemingly harmless, ordinary supplements were combined into a deadly weapon; the two doctors, with decades of experience, had never seen such a method. The doctors also pointed out that Mr. Tang's Vitamin D and calcium levels were not stable but fluctuated, indicating that the poisoner likely adjusted the dosage and type of poison based on each treatment plan to achieve maximum effect—the meticulousness and ruthlessness of the method were evident.
The prosecution then presented Ms. Jin's online shopping records, showing that she purchased large quantities of Vitamin D and liquid calcium using different aliases and addresses, and also bought Vitamin D2 through the black market. She claimed the vitamins were to be brought back to China as gifts for relatives and friends, and the calcium was a folk remedy for athlete's foot—completely failing to explain why she used an alias to purchase them. Her lawyer also attempted to shift blame to her mother-in-law, claiming that she was responsible for cooking during their cohabitation in 2019. The prosecution's investigation found that the seasonings her mother-in-law brought did contain excessive additives, but these were completely unrelated to vitamin D and calcium. Furthermore, Mr. Tang's blood calcium levels continued to rise after his mother-in-law left Sweden, sufficient to clear her of suspicion.
In her WeChat conversations with friends, Ms. Jin repeatedly mentioned her fear of not being able to get back the down payment for the house after a divorce, even saying, "If my husband died, there wouldn't be so much trouble"—this statement solidified her motive. The prosecution's most compelling evidence was that during a search after the incident, police found a small brown bottle with a white cap in the pocket of a pair of shorts identical to those in the hidden camera video. The residual liquid contained a staggering 79,000 milligrams of calcium per liter—irrefutable evidence.
Having run out of options, Ms. Jin turned to emphasizing her high level of education and career success in court, to the point that even the judge couldn't bear it and ordered her to stop talking about matters irrelevant to the case.
Most Ultimately, the judge found her guilty of attempted murder. Since the poisoning began in 2019, under old Swedish law, the minimum sentence is ten years and the maximum is eighteen years. The judge considered the "meticulous planning and long-term intentional harm" as an aggravating circumstance, sentencing her to 12 years in prison and ordering her to pay Mr. Tang $31,000 in compensation. The judgment also mentioned that Ms. Jin received a suspended sentence in November 2025 for another accounting crime, details of which were not disclosed.
Looking back at this case, what's most chilling isn't the sophistication of the poisoning method, but the clear timeline: her husband repeatedly teetered on the brink of death, doctors were helpless, and the person who did all this was simultaneously calculating her property, will, and lover's affairs. Even on the night her husband was on the verge of death, her mind wasn't on saving him, but on preventing the situation from escalating.
Two years of silent poisoning relied not on any sophisticated poison, but on the most basic trust—when your partner helps you pour water or flush the pipes, you never imagine that those hands could also be deadly.
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