Most fibers are flammable, but there are also a small number of fibers that are not flammable or do not burn at all, such as glass fibers.
Polyvinyl chloride fiber is also one of them. Polyvinyl chloride fiber is the abbreviation of polyvinyl chloride fiber and is commonly used to make flame retardant materials.
Because this fiber has good warmth retention and heat resistance, and is light in weight, it is suitable for use as work clothes for humid environments and field workers.
However, this fiber cannot withstand ironing, does not absorb moisture, has poor electrostatic effect, and is difficult to dye industrially, so it has been rarely used in the textile field in recent years.
Therefore, except for some special work clothes, few people wear clothes made of chlorine fiber.
Wang Zihan went missing and was killed. From a probability perspective, the probability that people from the surrounding natural villages committed the crime was relatively high.
Because there are very few outsiders in the western suburbs vineyard, the police from the western suburbs police station had already ruled out the possibility of trafficking by outsiders when searching for Wang Zihan's disappearance in the early stage.
If the scene discovered by Lu Chuan and others was 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 made of pure cotton and could not contain chlorine fibers.
After recording the relevant experimental results, Lu Chuan began to conduct DNA identification on the purified dander.
The updated equipment is the most advanced DNA information identification instrument currently on the market, and identification speed is faster than previous instruments.
In less than an hour, the identification was completed.
"Master! I won the competition!"
"What hit the mark?"
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 DNA information of the skin flakes we found is consistent with that of Wang Zihan. 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.
"OK!"
Finding the first scene means that the fibers they found were likely left by the murderer.
"How was the fiber analysis?"
"It's chlorofluorocarbon fiber."
"Polyvinyl chloride?"
"Yes, it's polyvinyl chloride."
Liu Guodong frowned: "This thing is just ordinary plastic."
"This stuff is everywhere in the countryside, but the fiber filaments we extracted are not in this form of ordinary plastic. The filaments we collected should be textile materials for clothes."
Lao Bai shook his head: "The clothes made of these things are not breathable, and few people wear them."
Yang Sen echoed: "Except for some special work clothes, there are really not many clothes made of this kind of stuff. You can send the results to Ren Qiang and the others and let them see who wears this kind of clothes during the investigation, and maybe they can narrow down the scope. "
Conference room one.
Ren Qiang took the report sent from the current survey office.
"Wearing clothes made of chloroform fiber?"
"What kind of clothes are made of chlorine fiber?"
Ren Qiang obviously didn't have an intuitive understanding of this.
In fact, in reality, chlorine fiber is still widely used, but most of it is 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: "These are clothes we found online, made of single chlorine fiber. When you check, see if anyone wears these 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: "We have almost left the dozens of households in Beitun today."
"I'll post the photos to the group to see if anyone has seen anyone in the village wearing these clothes."
"Okay, if you want to be busy, there is still a lot of physical evidence to be processed in the laboratory. I will go back first."
The current investigation of several boxes of physical evidence collected at the scene has been narrowed down because the first scene has been identified.
There is only one box and forty-three bags left that have not been processed.
If it's quick, it can be done in two or three days.
"Let's take a look. When I visited the village today, did you find anyone wearing the clothes in these pictures?"
"Especially if it's damaged, you can tell it's been worn for a long time."
"@张伟, send it to Sun Jun and his team and ask about the situation."
"@仁强, received!"
In the WeChat group, Ren Qiang sent the photos given by Liu Guodong to the group.
But Ren Qiang didn't have much hope for this way of searching.
After all, Ren Qiang has never seen the murderer relying on a few fibers.
But just because you haven’t seen it doesn’t mean you can’t.
"Brother Qiang...this dress...I have seen it today."
Zhang Hui was holding his mobile phone at the moment and pointing to a piece of blue overalls on top.
Ren Qiang was slightly startled: "Where is it?"
"Tanzhong made his fortune. The first family at the west end of the village had a silly wife. When I went there, he was wearing this blue overalls."
"But what he wore was new, not damaged as you said."
"new?"
Ren Qiang's eyes narrowed slightly.
Isn't it normal to change clothes after killing someone?
"Is there anything unusual about this Tanaka?"
"Tanakafa..."
Zhang Hui thought for a while: "Nothing unusual. He is a very honest man. He has a stupid wife at home..."
"To be unusual...he is one of the few villagers who thinks that Chen Liuzi will not kill the Wang family's children because of the vineyard contract."
Ren Qiang nodded: "In this case, let's focus on it and check if there are any disputes or conflicts between the Tianzhong family and the Wang family."
"Okay, I'll ask some families tomorrow."
A piece of clothing can only provide clues, but it is impossible to directly identify the suspect.
Early the next morning.
Zhang Hui arrived in the village early.
After a day of investigation and visits yesterday, Zhang Hui already had a certain understanding of the people in the village.
The Zhang family's aunt is the know-it-all in the village and knows something about everyone's family.
"You said Lao Tian's family is a stupid wife who doesn't even have a child."
"There is no conflict between their family and the Wang family. The two stores and vineyards are next to each other..."
"By the way, five years ago, when the scope of the vineyard contract was re-divided, the old Wang family and the old Tian family got into a fight over the boundaries of the land contract."
"Later, I found the village party secretary to make adjustments."
"Oh, Aunt Zhang, what is the specific situation?"
"Oh, I don't know exactly what happened. The beating was very fierce and there was blood. But the old Wang family later accompanied Qian, so it was nothing."
"How will the relationship between the two families be like from now on?"
"It's not bad. The two families live next to each other and often get together. 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.
"Lao Wang's family occupied half of the ridge in Tianzhong Fajia. It seems that they gave it back later. It happened several years ago. I can't remember the details."
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 Lao Tian's family and Lao Wang's family has not been resolved. In fact, the half of the ridge was created by Tian Zhong. The Wang family's wife insists on saying that it belongs to his family. When Lao Tian had a drink last time, he said that sooner or later the land must be brought back..."
Some people died, but not completely...
