National Forensic Doctor

After being taken to the police station, Sun Xiuwen's two best friends still acted as if they didn't care. Their boyfriends looked like ruffians. It wasn't their first time in the police station, so they really didn't care.

[I hope readers will remember our domain name Taiwan Novel Network →𝔱𝔴𝔨𝔞𝔫.𝔠𝔬𝔪]

The parents of several people were relatively sober. After saying good things, they were busy calling the legendary capable person, but the effect was minimal.

Meng Chengbiao observed several people coldly, and it only took a short time to find that one of the two seemingly carefree girls had a rather uneasy look in her eyes.

"Take all four people to the interrogation room." Meng Chengbiao determined the target, and then said: "I will interrogate Liu Mingxue first."

"Yes." Faced with such a case, the police officers of the police station could only cooperate. Their own interrogation rooms had to be vacated.

At the same time. Jiang Yuan asked someone to open the idle courtyard door on the hillside.

This house belongs to the uncle of Liu Mingxue's boyfriend Sun Jianyu, who works outside and may not come back once a year. He gave the house to Sun Jianyu's parents to take care of. Sun Jianyu secretly made a key and occasionally sneaked in to watch TV.

A few friends knew about it and gathered here, forming a secret base.

There were not many people who lived in the village for a long time. The location of this house was slightly off. Several people pulled up the heavy curtains in the room and clamped them with clips. From the outside, it was completely lightless.

This house made Sun Jianyu and others happy for a long time.

From the entrance, you can see the traces of their happy life. Among the garbage discarded in the yard, there was still food that had not yet rotted, but the few flowers raised in the yard were basically dead.

Jiang Yuan was dressed neatly at the door, and after entering the yard, it was the survey process.

For Jiang Yuan today, this means two security guards lead the way, four on-site investigation technicians follow, a criminal photography technician who specializes in placing labels and taking photos, and a photographer who records the whole process to accumulate evidence, improve the chain of evidence and facilitate the review of the death penalty.

9 people enter, which is still a certain pressure for such a house.

Jiang Yuan quickly observed and arranged personnel to investigate floor by floor to disperse the personnel and speed up the process.

After the arrangement downstairs was completed, Jiang Yuan came to the bedroom upstairs.

This is the real secret base and the place most likely to become the first scene. Jiang Yuan originally planned to investigate it from head to toe, but after taking a look in, the LV5 crime scene investigation made him focus his attention on a pillow at the head of the bed.

There is no quilt on the bed in this bedroom, and the sheets are messy and dirty. The two pillows next to it are also yellowed after years of use.

Only the pillow near the door is white and obviously washed.

Jiang Yuan sighed, walked over with a horseshoe mirror, picked up the pillow, and studied it silently.

When people are suffocated, some liquid often flows out of their mouths, usually not blood, so spraying luminol is useless. After the pillow is washed, the possibility of residue is lower.

However, the pillow core is difficult to clean, especially for young people who are not good at washing clothes. If you just use washing powder or detergent to bubble and rub it, there is still a possibility of residual evidence in the pillow core.

Jiang Yuan first waved to someone to take a photo, then picked up the pillow with gloves and looked at it. There was no obvious stain, then put it in the evidence bag, handed it to the person behind him, and said: "The evidence that has been obtained will be sent to the Criminal Science Center for inspection first."

This is something that ordinary criminal police teams can't even think about. Not to mention that the evidence goes alone, people have to squeeze in. It is even more impossible to say that the evidence is sent to the Criminal Science Center for immediate inspection. The Criminal Science Center is always overloaded, because the leaders are unwilling to increase huge investments unless they have no choice. Therefore, most of the evidence has to be scheduled.

That is, the homicide task force and the special task force may have some privileges. Of course, Jiang Yuan's privileges are more extensive. Even the Criminal Science Center in Beijing dare not delay the evidence he sent.

After taking away the pillow, Jiang Yuan checked the bed sheets, mattresses, and mattresses, and indeed found some suspected secretions on the bed sheets.

Jiang Yuan still asked people to take photos first, and then cut off the part of the bed sheet containing secretions with scissors on the spot.

This looks like destroying evidence, but in fact, this is the real standard practice.

Some young criminal police are lazy or ignorant, and will pack up the entire bed sheet and take it back. Usually, they get used to it after being scolded a few times.

This is not only because packing up the entire bed sheet and taking it back is a waste of space, but it is also useless for testing.

A large group of bed sheets was handed over to the technicians of the Criminal Science Center. They didn't know which part to test, and even if they re-checked it, they might make a wrong judgment.

On the other hand, there is no such thing as a "beep" sound for real testing instruments to give results. Whether it is a liquid or gas mass spectrometer, or any other instrument, the most common practice is to take a piece of the sample - for a bed sheet, that is, cut a piece off and put it into the machine for analysis.

Therefore, when a criminal investigator presents a complete bed sheet or towel, he either only took part of the fiber and did a partial test, or took the wrong evidence.

The remaining sheets were collected by Jiang Yuan. Although this part was also evidence, he was not in a hurry to test it. If necessary later, just use it again.

Immediately afterwards, Jiang Yuan cut off part of the mattress fabric at the head of the bed. This part did not even need to be gathered up, otherwise the police evidence room would not be enough.

After all these tasks were completed, Jiang Yuan felt a little more relaxed and began to inspect the room again.

The bedroom that a few teenagers used as a secret base was clean and tidy. There were all kinds of messy objects everywhere, and the hygiene made the investigators frown. To a certain extent, this could be regarded as a way to hide evidence.

Buzzing…

The phone in my pocket vibrated.

Jiang Yuan frowned, took off his gloves, and took out his phone: "Hey, Lao Meng."

"Team Jiang, the victim Sun Xiuwen's best friend Liu Mingxue, and Liu Mingxue's boyfriend Sun Jianyu have all confessed." Meng Chengbiao said this first, and then said: "Liu Mingxue made an appointment with Sun Xiuwen that day. Relatives made an appointment to make a video call, so they did not come out. The three of them had a party and drank at Sun Jianyu's uncle's house. During the period, they talked about cleaning up the house and waited for relatives to come to the house. There was a dispute. Liu Mingxue said that Sun Jianyu got drunk because of drinking and covered Sun to death. Xiuwen."

Jiang Yuan nodded: "What did Sun Jianyu say?"

"Sun Jianyu said that Liu Mingxue went up and strangled Sun Xiuwen's neck first, and he covered her with a pillow out of help."

Jiang Yuan breathed a sigh of relief. In this case, the murderer was limited to two people. It was just a matter of Sun Jianyu killing alone, or whether they were the master and the accomplice, or whether they were the master and the slave.

After Meng Chengbiao finished speaking, he felt more relaxed: "There was no third person at the scene. In this case, we may have to carefully distinguish the testimonies of the two people. However, there should be no problem that the murderers were Liu Mingxue and Sun Jianyu or one of them." of."

"Where are the jeans?" Sun Xiuwen climbed down from the second floor through the jeans tied together. Sun Xiuwen didn’t go back, so how did the jeans go back?

Meng Chengbiao coughed twice, sighed again, and said, "Sun Jianyu claimed to have climbed in at night, put on gloves, put away his jeans, and jumped off the second floor."

"Jump down?" Jiang Yuan recalled the traces downstairs and couldn't help but shake his head. It rained that night, and like motorcycle marks in the wild, they were basically washed away and couldn't be seen clearly. It’s not surprising that some of the footprints on the wall were damaged.

Meng Chengbiao just thought that Jiang Yuan was doubting about jumping off the building, and said: "This Sun Jianyu is in good health, with a good figure, especially a thin body. He has filmed some fast parkour scenes. In terms of flexibility, he is more flexible than ordinary people." He is much stronger and should be able to jump off a building without getting hurt."

"The body is relatively thin. How thin is it?" Jiang Yuan paused and asked: "Can you kill Sun Xiuwen independently?"