The test results were astonishing. Dong Zhenhua, whom everyone expected to be poisoned, showed no signs of it, while Xu Xinyi, the one who administered the poison, exhibited mild thallium poisoning.
"Could it be that this was her first attempt, and I escaped because I had to leave for a business trip?" Xiao Wenqiang expressed a sense of relief as if she had narrowly escaped a disaster.
"It's possible, but not being poisoned also shows you usually conduct yourself properly and have good luck!" Officer Xiao Wu, who had been assisting Dong Zhenhua with the case since he arrived, made a rare joke.
"Haha, I do have good luck!" Xiao Wenqiang knew it had nothing to do with luck but then feigned confusion and asked, "But why would Xu Xinyi be poisoned instead?"
"This thallium poison is extremely dangerous. Perhaps there was a leak when she was administering it, and she got some on herself!" Officer Xiao Wu could only speculate. "The most important thing now is to interrogate Xu Xinyi about where she obtained this thallium poison, as such a potent toxin cannot be bought on the market."
Officer Zhang handed the lab report to Xu Xinyi. "The results are in. You have mild thallium poisoning. Have you had any uncomfortable symptoms recently?"
Xu Xinyi took the lab report, muttering, "How is this possible! I wore a mask and gloves. I was very careful..."
"The facts prove otherwise, and Dong Zhenhua is not poisoned. Xu Xinyi, this is a case of ill-gotten gains leading to one's own downfall. Even heaven can't stand it!"
Initially, Xu Xinyi intended to remain silent. However, she soon realized the police had more evidence than she anticipated. Moreover, upon learning that Dong Zhenhua was unharmed while she herself was poisoned, she found the situation absurd.
As she laughed, tears began to stream down her face. She mocked herself, "Is this truly retribution? Even heaven can't stand it? Hahahaha... Sun Liang gave me this poison... Hahahaha, and I'm the one who ended up poisoned... Hahahaha... Officers, my... my stomach hurts so much..."
Xu Xinyi's interrogation was paused due to her abdominal pain, and the police took her to the designated hospital for treatment.
Meanwhile, Sun Liang initially presented himself as a filial son dedicated to his mother's health and a good friend devoted to his friends' happiness. He repeatedly claimed his innocence, stating he was forced into his actions.
However, under mounting evidence and Xu Xinyi's confession, Sun Liang eventually broke down and confessed.
He claimed to have bought the thallium poison from someone on the street, who told him it could cause slow death without detection, but he didn't know its exact nature.
"Sun Liang is definitely lying. Thallium isn't something you can casually buy on the street," Officer Zhou stated with disgust after the interrogation. "This man still refuses to confess; is he covering for someone?"
The police were well aware that thallium, a toxic heavy metal, was not readily available on the market and was under state control. Xu Xinyi was unemployed, and Sun Liang was an ordinary office worker with no access to thallium.
So, where did Sun Liang obtain the poison? And why was he protecting the supplier?
Following this lead, the police investigation eventually traced back to Sun Liang's mother, Sun Guihua.
Sun Guihua had previously worked as a workshop employee in a factory that manufactured thermometers. Thallium was an indispensable component in low-temperature thermometers. Sun Guihua had a greater opportunity to obtain "thallium" than Sun Liang or Xu Xinyi.
When the police summoned Sun Guihua and began investigating her network of contacts, they uncovered something even more incredible. It turned out that Sun Guihua was Dong Zhenhua's first wife, and the biological mother of Dong Bin.
It was now two nights later, and Xiao Wenqiang had already returned to her villa. She received a call from Officer Xiao Wu informing her of Sun Liang's mother's true identity and asking Dong Zhenhua to return to the police station to assist with further investigations when he had the time.
This time, Xiao Wenqiang was also stunned. She frantically asked the system in her mind, "86365, what's going on? Sun Liang's mother is Dong Zhenhua's ex-wife, which means Dong Bin is her son too. How could she poison her own son?"
"I don't know either, Wenqiang! This story is really too complicated. The original host, Dong Zhenhua, died too early, and the subsequent plot was never written!" System 86365 admitted it felt overwhelmed.
Xiao Wenqiang, however, went to the police station the next morning as agreed, eager to understand what had truly happened.
After prolonged interrogation by the police, Sun Guihua's psychological defenses finally crumbled, and she revealed a truth that no one had anticipated.
Sun Guihua met Dong Zhenhua when she was twenty-one, in the prime of her youth.
She was very beautiful then, full of youthful spirit, with two thick, long braids. Sun Guihua, a young woman with little education, had come from a small rural village to the big city of Yuncheng to work, finding employment washing dishes and serving food in small restaurants.
At that time, Dong Zhenhua was not the real estate tycoon he was now but a laborer toiling on construction sites.
Dong Zhenhua's construction site was close to the restaurant where Sun Guihua worked. He would sometimes eat at the small restaurant with his fellow workers after finishing his day. This led to them becoming acquainted.
As mentioned, Sun Guihua was very beautiful, and several male workers at the construction site fancied her. However, Sun Guihua only had eyes for Dong Zhenhua because she noticed that this man was not only hardworking but also very ambitious. While others just thought of earning a living through manual labor, he was already consciously learning new skills.
How did Sun Guihua discover this? She noticed that Dong Zhenhua often offered his generous portions of meat to the cement workers. As the saying goes, "He who eats from your hand is bound by your will," and the cement workers subsequently began teaching Dong Zhenhua their trade.
Thus, Dong Zhenhua continued his manual labor while learning new techniques. He gradually advanced from a laborer to a cement worker and, within two years, became a foreman. His relationship with Sun Guihua also blossomed, and they married at the end of the following year.
On their wedding night, Dong Zhenhua discovered that his wife, Sun Guihua, was not a virgin. However, upon her explanation that she had fallen and sustained the injury, Dong Zhenhua chose to believe her.
Their love was at its peak then, and they welcomed their son, Dong Bin, a year after their marriage.
Their relationship was initially good. However, when Dong Bin was four years old, something happened. This event ultimately led to Dong Zhenhua and Sun Guihua's divorce.
It was something that Dong Zhenhua would later refuse to speak about...