Animal Detective

Chapter 415 Panacea

After finding a clue amidst the chaos, the case progressed so quickly that Shen Xin couldn't believe it.

The airport's prohibited items registration record clearly documented this confiscation.

December 2014, 7.

It even included a specific time, 10:20 a.m. that day.

A bottle of "World No. 2" brand universal rat poison was found in the carry-on luggage of passenger Guo Jinhua, which included his ID number, and was confiscated in accordance with relevant laws and regulations.

There's even Guo Jinhua's handwritten signature on the back.

Although there are no photos or records of the specific manufacturer, having a brand name is enough.

Rat poison falls under the category of pesticides. To be marketed and sold, it needs to obtain a pesticide registration certificate, a production license, and a product standard number—all three certificates must be combined into one.

This information can be directly accessed on the relevant national websites.

However, after investigation, it was found that there is no rat poison with this product name in Qiongzhou or even nationwide.

Products with expired registration certificates or that have already been removed from sale are also unavailable.

In this situation, it's actually not difficult to find out.

This proves that the brand of rat poison Guo Jinhua purchased was produced by an illegal manufacturer.

If it has already been investigated and dealt with, there will be relevant records.

If not, then it helped the local police in Qiongzhou uncover a case of illegal manufacturing and sale of rat poison.

Upon investigation, it turned out to be the former.

It couldn't be found in Qiongzhou itself, but it could be found in Jiaozhou, which is just across the sea.

An investigation revealed that in February 2015, Dong'an City, Jiaozhou, cracked a case involving the illegal production and sale of pesticides.

The case file records that this workshop-style illegal factory produced a large number of counterfeit brand-name pesticides, as well as so-called self-developed pesticides.

One of them is a rat poison called "World No. 2".

The case has long been concluded, and the main perpetrators are now in prison.

Yang Zeran rushed to Dong'an City immediately, reviewed the relevant files, and confirmed with the female security inspector that the product confiscated in the mail was indeed this one.

The white medicine bottle wasn't very big, and it had a green label on the outside with the product name "World No. 2" printed in an extremely exaggerated font.

There were also propaganda slogans like "Three Steps to Death," "Smell to Death," and "Kill Everything" on the side.

With the cooperation of the local police, Yang Zeran interrogated the suspects. After being released from prison, he immediately called Shen Xin.

There's no video, but just by listening to his voice, you can feel how excited Yang Zeran was at that moment.

"Shen Xin, we've found it, and we have a good chance of getting the key evidence." Yang Zeran said excitedly.

When Shen Xin received the call, it was almost time to leave work, and he and Ding Yuwei were discussing the visit records.

Guo Meijing's visits are still ongoing.

Shen Xin put the phone on speakerphone and said, "Stop keeping me in suspense and tell me quickly."

Yang Zeran said, "First of all, their small workshop was reported in February 2015 and then investigated and shut down."

"They also said that they dare not sell their products outside the region because they have no distribution channels and only sell them in provinces near Jiaozhou."

"After the incident, the local police also tried their best to recall all the illegal pesticides by checking the sales records."

"That means that Guo Jinhua, who only started poisoning rats in June 2015, could not possibly have bought this brand of rat poison."

"So Shen Xin, do you understand? As long as we prove that Fu Lanting was poisoned with the world's number two rat poison, then the murderer is Guo Jinhua."

Guo Jinhua bought rat poison in July 2014 and then sent it back to Nanjiang by mail in March 2015.

At this point, Yang Zeran's tone became increasingly excited as he said, "And do you know what Guo Jinhua meant by 'high technology'? It's all nonsense."

“I asked them, and they claimed that this rat poison is a panacea.”

"It can kill not only rats, but also cockroaches, bedbugs, fleas, and all kinds of insects."

"That's why they chose the name 'World's Number Two,' claiming it's a product from abroad that utilizes high technology."

"But it's actually still just ordinary rat poison, mainly based on diluted bromadiolone stock solution."

The commonly used solvent for bromadiolone is ethanol, and the typical concentration is 0.5%.

In actual use, it needs to be further diluted to 0.005%.

The so-called mother liquor they produce actually contains only about 0.2% of the ingredients in order to reduce costs.

In addition, they added an ingredient to achieve the effect of killing cockroaches.

"It's the broad-spectrum insecticide fipronil. The country has restricted its use since 09, and now it's mainly used in the production of cockroach bait."

"This is absolutely not allowed to be added in legal and compliant rat poison production. But these small workshops, in pursuit of so-called effects, don't care about this at all."

"They said they added 0.1 percent fipronil to the pesticide, specifically for killing insects." At this point, Yang Zeran couldn't help but leave Shen Xin in suspense, asking if he understood.

Shen Xin wasn't stupid; he understood immediately.

These guys added fipronil to achieve a kill-all effect.

It kills both rats and cockroaches.

This addition is clearly a regional addition specific to the South.

Everyone knows that cockroaches in the South are not only numerous, but also as big as a fist.

That's why there's a demand for cockroach killers.

However, there is no such demand for rat poison sold in Nanjiang, or rather, in Nanjiang.

Therefore, this kind of rat poison should not be available in the market in Nanjiang.

More importantly, because of this special additive, as long as fipronil is detected in Fu Lanting's body, Guo Jinhua can be identified.

Because other people can't even buy the corresponding rat poison.

After sharing his analysis, Shen Xin thought of something else and said, "So, the reason Guo Jinhua took more than two months to poison the poisoner wasn't because he was being careful."

"It's because this rat poison was made with substandard ingredients and lacked sufficient active ingredients, so he couldn't control the precise dosage."

Guo Jinhua may have intended to poison Fu Lanting slowly over a long period of time.

Who knew she bought counterfeit medicine with insufficient ingredients? So, at the end of June, Fu Lanting developed symptoms, but they were very mild.

Guo Jinhua then continuously adjusted the dosage, which gradually achieved the effect he wanted.

That's why it takes so long.

Yang Zeran's tone brightened, and he hurriedly said, "That's right, that's exactly the point. Guo Jinhua couldn't accurately determine the composition, which is why it took him so long."

He thought to himself that Shen Xin reacted quickly, and then said, "Shen Xin, you should go and ask Lao Lü to see if it is still possible to detect fipronil in the samples that were preserved back then after almost three years."

Lao Lü is the director of the physical and chemical laboratory of the criminal investigation institute in the bureau.

The case left behind a lot of physical evidence, including samples taken from the home and the noodle shop kitchen.

At the same time, after the autopsy, Fu Lanting deliberately left behind a large number of human tissue samples, such as liver, in case the examination was not accurate enough and would need to be tested again when the case was reopened.

These tissue samples are now sealed in the cold storage of the Institute of Criminal Science.

Whether it can still be found out or not, we'll have to ask them.

Shen Xin glanced at his watch and said, "Okay, I'll come over in a bit and ask. You need to secure the relevant evidence. This case is unsolved, and so much time has passed, so there can't be any flaws in the evidence."

A single word of advice suffices. Yang Zeran has spent years sitting in an office, mostly guiding case handling; he knows exactly how to ensure a case is handled thoroughly.

After hanging up the phone, Ding Yuwei, who was standing next to her, got up and walked out without saying a word.

Zhao Tianxing went out to investigate, but he wasn't there.

The Criminal Investigation Department is not located in the Municipal Public Security Bureau; it has its own separate office.

Because they also undertake civil injury assessments for the entire city.

Throughout the journey, knowing the importance of not opening champagne halfway through, the two remained silent and did not speak.

Ding Yuwei couldn't help but break the deadlock first, asking, "Shen Xin, if it was poisoning, why would Guo Jinhua poison himself?"

"Is it the kind of despair that makes one want to die along with others, or is it simply a case of the thief crying 'stop thief,' an act of concealing one's own role as the murderer?"

"If it's the latter, then isn't he being too harsh on himself?"

To cover up that he was the murderer, he poisoned himself.

When police investigate poisoning cases like this, they usually start by checking the person's spouse.

It's very difficult for outsiders to poison someone.

Moreover, in more than half of these cases, the other half poisoned the other person.

The reason Guo Jinhua wasn't investigated back then was because he had also been poisoned, and almost died from it.

They were finally saved, but they were left with such serious aftereffects.

Even a thief crying "stop thief!" doesn't need to go to this extreme.

Ding Yuwei was worried that there might be other hidden stories behind this.

"I understand your idea."

Shen Xin had already considered this issue, and his conclusion was to ignore everything else for now and confirm that Guo Jinhua was the murderer first.

Even if he has many hidden reasons or is unwilling, as long as he poisons someone and commits a crime, that's unacceptable.

(End of this chapter)