I looked at these things and had already guessed what this animal plant was used for. It was indeed a kind of knowledge that wasn't very complex, and I often heard people in prison talk about using this method to kill. Yet, when faced with the reality of this technique, I found myself momentarily at a loss.
Because I had only heard about it before, but had never actually seen it.
I spoke up, "This administrator is quite good; this is indeed something that can be ingested. But this isn't some folk remedy; it's something that can take a life. If you grind these into fine powder and put them in a cup of water, especially mixed with tea leaves, the toxicity of this Moth isn't very strong. Whether touched by hand or ingested, it generally doesn't pose much of a problem."
I glanced at the two individuals, who were both intently watching me.
I pointed to the white powder on the Moth's wings and continued, "Many Moths have this kind of substance on their wings, but its toxicity is actually low. If ingested without caution, at most it would just cause diarrhea. However, there is one situation: if there are wounds in the gastrointestinal tract and this white powder from the Moth's wings is consumed, then it could indeed be dangerous."
I looked at the Moth and slowly said, "This white powder is a combination of phospholipids and proteins, primarily serving to retain moisture and assist in predation. For humans, the toxicity is minimal. However, there is a species called Long-Winged Butterfly that has significant toxicity; its poisonous powder can be lethal."
Zhao Mingkun examined the Moths and said, "It seems there isn't much here; even if ingested, could it kill someone?"
I shook my head and replied, "Not really. If there are no wounds in the stomach, the most likely outcome would be diarrhea. Of course, those who are allergic to such substances are another matter. But we all know the symptoms of allergies; Wang Yikai doesn’t seem to exhibit any signs of an allergic reaction."
"At this point, this substance becomes useful," I pointed at the thorns on the plant's branches and said, "These thorns are quite dense; if you don't look closely, you wouldn't notice them at all. However, the inside of a person's body is much more fragile than their exterior. Once these things enter the stomach, they become sharp weapons."
Zhao Mingkun understood now and said to me, "So you're saying that when Wang Yikai drinks this mixed liquid, the thorns will first cut through his gastrointestinal tract, allowing the toxicity of the Moths to penetrate his body?"
I snapped my fingers and confirmed, "Exactly. No matter how it's done, as long as the Murderer can get Wang Yikai to drink this cup of water, he basically has no chance of survival. And this method will cause Wang Yikai to die slowly. Most of these thorns will be expelled with feces; however, as long as some thorns embed themselves in his intestines, it will lead to internal bleeding."
"And this bleeding occurs slowly; the toxicity seeps in gradually. If they happen to pierce through his stomach lining, then the danger increases significantly. Because this process is slow, initially these thorns entering his stomach with water won't have an immediate effect. But as his intestines contract and move, these barbs will start to take effect."
"You see, these thorns have curved tips; if they embed themselves in the intestines backward, they are unlikely to come out easily. The thorns gradually penetrate deeper until Wang Yikai feels pain in his body. But he won’t realize what’s happening inside him; he might think he just has an upset stomach. In reality, he’s already on the brink of death."
"Because his intestines are cut open, he starts experiencing rectal bleeding and abdominal pain. Yet with his hemorrhoids condition, he brushes it off as just a hemorrhoid issue. It's like boiling a frog in warm water; without realizing it and while we repeatedly ignore the danger, eventually quantitative changes lead to qualitative changes—Wang Yikai dies right before us."
The administrator looked at me and shook his head saying, "Although I don't understand what just happened here, it sounds impressive. But why not just throw away these things after using them? They smell bad; they seem like they've been here for quite some time."
"Exactly!" I turned my attention back to the administrator.
The administrator, startled by my sudden turn of head, took a step back. "You scared me to death."
As he stepped back, he accidentally knocked a stack of documents off the table, quickly rushing to pick them up.
His words held a certain truth; even someone unfamiliar with the case could understand this point. But why didn’t the Murderer dispose of everything? It wouldn’t have been difficult at all. If she had simply thrown the items into the trash can, all problems would have been resolved. If she had destroyed the chemicals, we wouldn’t have been able to identify these issues so easily. Yet, in reality, the Murderer did not take such actions.
This behavior did not align with the Murderer's intelligence and character. From the various methods of killing observed, it was clear that the Murderer was a clever and cautious individual who would not make such a grave mistake. There was something wrong! Deng Xuemei's sudden departure must have some hidden agenda behind it.
Moreover, where could Deng Xuemei have gone? Had she truly left the city?
Setting that aside for now, the methods of murder employed by the Murderer had already been unraveled, leaving only one mystery unsolved. Hu Pei and Luo Ding were both frightened to death. These two individuals were timid by nature and felt guilty towards Lu Zhiqiu. Luo Ding believed Wang Yikai had killed Lu Zhiqiu, while Hu Pei had witnessed Lu Zhiqiu being dismembered by Liang Mei from hiding.
Under the dual pressure of guilt and fear, both believed that Lu Zhiqiu's ghost had returned for revenge, leading to their deaths orchestrated by the Murderer.
As for Hu Xiaoxue, Liu Ruijie, Wang Qianduo, and even Zhang Xue, Zhao Pingjuan, and Zhou Moli—those who were not directly connected—they were all killed using corrosive substances in a similar manner. Although the processes varied slightly, the method of murder remained consistent. These individuals had gouged out their own eyeballs and died in immense agony.
In contrast, Zhang Yi, Cheng Lu, and Sun Shouwang met their end in a much "easier" way; after ingesting a certain substance, they quickly succumbed to death without even a sound.
Yang Licheng and Wang Xin were poisoned by gas generated from Calomel and died right before our eyes.
The Murderer meticulously utilized her knowledge of chemistry and biology with simple yet clever techniques to kill all these people. And now, it seemed that there was no one left for her to kill.
As for Liang Mei, she was killed by the Murderer herself. To this day, we still do not know where Liang Mei was murdered or what method was used. However, upon seeing the Murderer, Liang Mei appeared shocked—indicating that she must have known this individual. Strangely enough, these people did not seem to recognize Deng Xuemei.
Yet I had also mentioned earlier that there was one more question that remained unanswered: the enormous face that flashed through Luo Ding's mind. I still could not solve this issue. However, we now knew that the Murderer relied on chemical and biological knowledge; thus, Zhang Yi’s fleeting vision of a face likely wasn’t a supernatural phenomenon.
Although I couldn't find an answer to this puzzle at present, I believed it wouldn't be long before it was resolved.
Just then, the administrator called out again: "Hey! What do you think this is?"
I furrowed my brow in exasperation at this administrator; he truly was overly dramatic.
“What’s wrong?” I asked.
At that moment, the administrator pulled out a piece of paper from the stack of documents and said, “Look here, there’s a medical record and a letter. I just glanced at it, and it seems to be about Deng Xuemei. It mentions some kind of terrible illness…”
I reached for the medical record, and indeed, it was Deng Xuemei's. The record was filled with various technical terms—transaminases, internal proteins—things I couldn’t understand. However, I could clearly see what was written at the end: terminal stage.
With such a note, we understood the severity of the situation. From the medical record, it appeared that her illness was identical to her father’s. Could it be hereditary? I wasn’t a doctor, so I didn’t know for sure, but judging by the record, it seemed quite serious; the doctor estimated she had about two years left to live.
I frowned and handed the medical record to Zhao Mingkun.
After reading it, Zhao Mingkun asked with some confusion, “If Deng Xuemei doesn’t have long to live, then her actions in her thirties—killing so many people—make sense. Even if she were sentenced to death, there would still be a lengthy review process to prevent wrongful convictions.”
I nodded and replied, “I’m more familiar with this than you are. If she has such a serious illness, then the review process would take even longer. Whether or not Deng Xuemei gets caught becomes irrelevant. Is that why she refused to destroy anything? Is that why she indulged herself in whatever she wanted to eat or buy before fleeing? Is that why she separated from her superior?”
Zhao Mingkun responded, “I’m not sure, but this could explain why Deng Xuemei killed so many people. After all, killing one is breaking even; killing two means profit.”
I furrowed my brow and said, “But there’s also a letter.”
With that, I picked up the letter. I opened it and saw that it began with:
“I would rather die than be tormented by illness and pain. Rather than die alone in solitude, I would prefer to kill those indifferent, those who speak insincerely, those hypocritical people. Having them accompany me would make my descent more interesting…”
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