Most fibers are flammable, but there are a small number of fibers that are non-flammable or not burning at all, such as fiberglass.

Chlorine fiber is also one of them, chlorine fiber is the abbreviation of polyvinyl chloride fiber, which is commonly used to make flame retardant materials.

Because this fiber is warm, heat-resistant, and lightweight, it is suitable for use in wet environments and field workers' work clothes.

However, this fiber cannot withstand ironing, does not absorb moisture, has poor electrostatic effect, and industrial dyeing is also difficult, so it has been rarely used in the textile field in recent years.

Therefore, except for some special work clothing, few people wear clothes produced by chlorine fiber.

Wang Zihan was missing and killed, in terms of probability, the probability of several people in the surrounding natural tun committing crimes is relatively large.

Because there are very few outsiders in the vineyards in the western suburbs, the police of the western suburbs police station have ruled out the possibility of abduction and trafficking of outsiders when they searched for Wang Zihan's disappearance in the early stage.

If the scene discovered by Lu Chuan and others is the first scene of Wang Zihan's disappearance, it is very likely that these fibers were left by the murderer. m.

As for Wang Zihan, when he died, he was wearing a school uniform, which was a pure cotton product, and it was impossible to have chlorine fiber.

After recording the results of the relevant experiments, Lu Chuan began to conduct DNA identification on the purified dander.

The updated equipment is the most advanced DNA identification instrument on the market, and it is faster than the previous instrument.

In less than an hour, the identification was complete.

"Master! Matched! ”

"What's the right thing?"

Liu Guodong, Lao Bai, and Yang Sen, who were busy analyzing other physical evidence, ran over.

"Dander!"

Lu Chuan handed the comparative analysis report to Liu Guodong: "The dander and DNA information we found are consistent with Wang Zihan's, and the place where the soil was renovated should be the first scene of Wang Zihan's disappearance!" ”

Liu Guodong took the report and read it carefully.

"Haha, good!"

Finding the first scene means that the fibers they found are most likely left behind by the murderer.

"How's the fiber analysis?"

"It's chlorine fiber."

"PVC?"

"Yes, it's polyvinyl chloride."

Liu Guodong frowned: "This thing is ordinary plastic." ”

"This thing is everywhere in the countryside, but the fiber filaments we extract, ordinary plastics are not in this form, and the filaments we collect should be textile materials on clothes."

Lao Bai shook his head: "The clothes made of this thing are not breathable, and few people wear them." ”

Yang Sen agreed: "Except for some special work clothes, there are really not many clothes made of this kind of thing, you can send the results to Ren Qiang and them, so that they can see who wears this kind of clothes during the investigation, maybe they can narrow down the scope." ”

Conference Room 1.

Ren Qiang took the report sent by the field survey office.

"Wear chlorine fibers?"

"What kind of clothes are made of chlorine fiber?"

Ren Qiang obviously doesn't have an intuitive understanding of this.

In fact, in reality, chlorine fiber is still widely used, but most of them are used for synthetic fibers.

However, what Lu Chuan found at the scene was a single chlorine fiber, which is relatively rare.

Liu Guodong took out his mobile phone: "This is what we found on the Internet, clothes made of single chlorine fiber, when you check, see if anyone wears these kinds of clothes." ”

"Especially if it's damaged, it looks like it's been worn for a long time."

Ren Qiang looked at the picture carefully and took a photo with his mobile phone: "Dozens of families in Beitun, we are almost gone today. ”

"I'll post the photos in the group to see if anyone has seen anyone in the tunzi wearing these clothes."

"Okay, you guys want to be busy, there's still a lot of physical evidence to be processed in the lab, I'll go back first"

The scope of several boxes of physical evidence collected at the scene has been narrowed down because the first scene has been identified.

All that had not been disposed of was one box, forty-three bags.

If it's fast, it can be processed in two or three days.

"Let's see, when you visited the village today, did you find anyone wearing the clothes in these pictures."

"Especially the broken ones, they look like they've been worn for a long time."

"@张辉, send it to Sun Jun and their group to ask about the situation."

"@任强, Roger!"

In the WeChat group, Ren Qiang sent the photos given by Liu Guodong in a group.

But Ren Qiang does not have much hope for this way of searching.

After all, relying on a few fibers to find the murderer, Ren Qiang has never seen it.

However, just because you haven't seen it doesn't mean you can't.

"Brother Qiang...... This dress...... I've seen it today. ”

Zhang Hui was holding his mobile phone at the moment, pointing to a blue overalls on it.

Ren Qiang was slightly stunned: "Where is it?" ”

"Tanaka made a fortune, and the first house in the west of Tunzi put on the west, there was a stupid daughter-in-law, and he was wearing this blue overalls when I went."

"However, he is wearing a new one, not a torn one as you say."

"New?"

Ren Qiang's eyes narrowed slightly.

Isn't it normal to change clothes after killing someone?

"Is there anything unusual about this Tanaka hair?"

"Tanaka ......"

Zhang Hui thought for a while: "Nothing abnormal, quite an honest person, there is a stupid daughter-in-law at home......"

"To say anomalous...... He is one of the few villagers who thinks that Chen Liuzi will not kill the children of the Wang family because of the vineyard contract. ”

Ren Qiang nodded: "In this way, focus on it, and check if there are any disputes or conflicts between the Tanaka family and the Wang family." ”

"Okay, I'll ask a few families tomorrow."

A piece of clothing can only provide clues, but it is impossible to directly lock on to the suspect.

Early the next morning.

Zhang Hui came to the village early.

After a day's investigation and visit yesterday, Zhang Hui already has a certain understanding of the people in the village.

Aunt Zhang is a know-it-all in the village, and she knows a little about everyone's affairs.

"You said that Lao Tian's family, a stupid daughter-in-law, doesn't even have a child."

"There is no contradiction between their family and the Wang family, the vineyards of the two shops are next to each other......"

"By the way, five years ago, when the scope of the vineyard contract was redivided, the Lao Wang family and the Lao Tian family fought because of the boundary of the land."

"Later, I still found the village party secretary to adjust."

"Oh, Aunt Zhang, what's the situation?"

"Oh, I don't know what the specific thing is, it's that the fight was quite fierce at the time, and it was bloody, but the old Wang family later accompanied the money, and there was nothing."

"What was the relationship between the two families after that?"

"It's okay, the two families are next to each other, often together, and they have a good relationship......"

After Zhang Hui left Aunt Zhang's house, he went to the village party secretary's house to learn about the situation that year.

"The old Wang family occupied half of the ridge in the field, and then it seems to have been returned, it has been several years, and I can't remember the specifics."

Zhang Hui then visited other villagers who knew about the dispute, and learned more about the ins and outs of the matter.

The most important information was provided by Tanaka's neighbors.

"The matter between the Lao Tian family and the Lao Wang family was not resolved, in fact, the half of the ridge was sent from the field, and the daughter-in-law of the Wang family had to say that it was his family, and Lao Tian said when he drank last time that he would have to get the land back sooner or later......

Some people died, but not completely......