"It's not easy to do," Seeing Brother Song take back his mobile phone, Qi Yuan hesitated for a while, but still said: "Now it seems that it is really difficult to find an organization or individual who tracks down the illegal production and sale of rat poison ......."

"It's easy to find, but the hard thing is to try to lock them down without startling them." Brother Song shook his head and said: "There must be buying and selling in the market, that is, there must be sellers if there are buyers, and for this kind of small-cost goods, there can be only one buyer if there is a seller."

As a last resort, as long as we issue a bounty order and the bounty is higher, someone will always report these channels to us. It's just that as soon as the reward order was issued, I thought that the disclosure of part of the case also meant that the murderer and the dealer could receive the news, and there might be trouble at that time. ”

"But ......" Qi Yuan hesitated a little: "Buying and using poisonous rats is also a crime, and reporting it means 'throwing yourself into the net', and someone will ...... for that bounty."

"In this world, there is no shortage of legal blindness." Brother Song interrupted him and said softly: "What's more, who said that if you know and know the existence of this 'buyer', you must buy their poisonous rats?" ”

"It seems to be the same thing...... Qi Yuan thought thoughtfully.

Brother Song smiled: "So don't worry, the suspect can't escape, we just want to try not to startle the snake now, so we are more cautious, and the investigation method is mainly indirect investigation and peripheral investigation, so the difficulty is naturally relatively large."

But as the investigation deepens, the clues gradually increase, and the direction becomes clearer, it will definitely become easier and easier, and in the later stage, it will even only need to pay mechanical manual labor.

You've also been apprenticed for half a year, and if you think about the cases you've solved in the past, are most of them like this? ”

"Understood." Qi Yuan bowed his head, indicating that he understood, and then asked, "So, what should we do next?" ”

"What do you think?" Brother Song didn't answer, but asked for his opinion.

He rolled his eyes twice, thought for a few seconds, and proposed, "Why don't we go to the farmers' market and the flower and bird market?" ”

Brother Song asked, "Why?" ”

"Farmers' markets, flower and bird markets, and pesticides are also sold, especially cockroach poison and rat poison." Qi Yuan replied: "Flies, mosquitoes, cockroaches, and rats, these four pests, whether in urban or rural areas, are deeply troubled.

If pesticides such as herbicides and insecticides only have a relatively large market in rural areas, and there is no personal demand in cities unless they are families who raise flowers and grasses, then the tools and pesticides to deal with these four pests are widely needed wherever they are.

The high-rise residents of the community may be better, as long as the sanitation work is relatively good, they will basically not be troubled by this aspect, but the low-rise residents of the old community and the urban villages are very troubled by this, and doing a good job of sanitation can only alleviate but not eradicate the troubles, not to mention the shantytowns, which are ......

There should still be a market for these products in the city, and there must be a market for these products in and around the farmers' markets, especially the mobile stalls in and around the farmers' markets.

As long as we find two or three people and inquire about the situation, maybe we can gain something. ”

After a pause, Qi Yuan continued: "Compared with the surrounding suburbs, in fact, I am more inclined to think that the poisonous rat in the hands of the murderer was purchased in the urban area.

Let's start with the motive analysis, whether it is a less likely personal reason, or a relatively large revenge hospital, its purpose is nothing more than killing people or creating a stain, creating **, poisoning is only a means rather than an end, and what kind of poison is even more irrelevant.

When choosing a drug, I think the murderer will consider nothing more than two factors: the degree of toxicity and the ease of getting his hands on it.

The toxicity is too small to achieve the purpose; If it's too difficult to get your hands on, it's too cumbersome, and the harder it is, the more special it is, and the more special it is, the easier it is to be found and the greater the risk.

In my opinion, if the rat poison really needs to go to the suburbs to get it, the murderer will most likely give up this method of crime and change to other methods.

Therefore, if you want to get the poisonous rat strong, there are only two ways to buy it directly in the surrounding area; Either they went out for a trip or went back to their hometown, and they bought it and brought it back.

If it is the latter, it means that the planning period is quite long, but if the fundamental purpose of the murderer is to deal with the hospital, the long planning period is understandable, and it cannot be ruled out, and it will be too troublesome to take us to investigate.

Therefore, I personally recommend that we start with the farmers' market and mobile stalls near the hospital and the suspect's residence. ”

"Wonderful," Brother Song's mouth raised a few points higher, nodded again and again, and affirmed: "Yes, it's really good, it's reasonable to think about, and there is not much of a problem in terms of logic, although it is still a little subjective."

But if you want to completely abandon subjectivity, it is also embarrassing, all in all, the possibility of the suspect buying rat poison in the vicinity is indeed not small, Xun team said that the urban market is small, of course, I also think so, maybe it is indeed not considered, after all, he is also a person, it is difficult to be perfect. ”

After a pause, he said, "You drive, let's go back to the district hospital first, visit the neighborhood to investigate, and I'll call the Xun team to tell him your opinion." ”

"Okay." Qi Yuan was very happy and immediately responded, after all, being affirmed was always very useful.

The two got out of the car and switched positions, Qi Yuan ignited the fire to start the vehicle, and Brother Song took out his mobile phone and made a call.

After chatting for a few words, he hung up, and Brother Song said: "Yes, Team Xun also recognizes your judgment, claiming that he has lived in the community for a long time and is a little unruly, let me admit my mistake to you for him." ”

"Uh......" Qi Yuan opened his mouth, he didn't know how to answer this.

Brother Song smiled again: "Anyway, your thinking is correct. However, the suburban county market cannot be abandoned, after all, the possibility cannot be completely ruled out.

The Xun team considered it this way, first focusing on investigating the major farmers' markets, and at the same time sending people to continue to follow up on Xiong Yunqi and her sister's line, as for the surrounding districts and counties, they first asked colleagues from the local criminal investigation brigade to help them understand the situation roughly, what do you think? ”

Different from the previous examination school, this time, Brother Song was sincerely asking for his opinion.

Qi Yuan hurriedly said: "Of course, this is the safest, and it couldn't be better." However, after all, we are still short of manpower, otherwise ask for assistance from colleagues at the police station?

They have always dealt with the grassroots level, and they know relatively more people in this area, so asking them to help may be much more efficient than doing it ourselves. ”

"Not a bad idea." Brother Song nodded again: "That's right, Team Xun also thinks so." ”