After the leopard is introduced, drink tea and light a cigarette:

He left behind two important discoveries of detective work—

First, how to use video to track the activity trajectory of the "gray jacket man"? What are the physical characteristics of the man in the gray jacket? Leave it to Shen Qianjun to speak.

The second is to visit the hotel proprietress Wang Lunyu - the conclusion of identifying "battery cars and people"? He was going to let Xiao Xia speak.

For his veteran, this kind of specification project discussion is too many times to attend! The two brothers in the institute had never been exposed to this kind of scene before, and having the opportunity to show it could stimulate their passion for detectives!

Who doesn't have the desire to "manifest" deep down? - What's more, there's a huge amount of work waiting for them next...

Yu Jian walked to the projector screen, pointed to the "2017.1.13. Floor Plan of the Scene of Wang Qing's Death", and explained the scene to everyone participating in the war-

The scene is located in Jixiang Hotel, No. 81, Fengwei Lane, Fenghuang Road, Ji'an Town, Tongxi County. The hotel consists of two rows of two-storey buildings in the east and west, with a courtyard in the middle.

On the first floor of the west building, there is a courtyard gate leading to Fengwei Lane, and to the east can reach Fenghuang Road, referred to as "East Lane"; To the north, you can reach Ji'an Avenue, referred to as "North Lane".

The central scene, that is, the scene of Wang Qing's death, is located in room 201 on the second floor of the west.

On the afternoon of January 13, the hotel business was light, and the other rooms were unoccupied. In the courtyard, only the proprietress Wang Lunyu is in the living room of the east building - watching TV; The hired waiter had been dismissed at the end of the winter.

According to Wang Lunyu, from the time Wang Qing rode a battery car to the hotel and found him dead in the bed in his room. During this period, only one "gray jacket man" appeared?

Tong Sega switches the screening to "Live Photos".

Inspector Yu took everyone from the orientation photos, overview photos inside and outside the hospital, and browsed all the way to the 201 indoor overview photos - stop:

Wang Qing's almost naked-death posture appeared in front of the members, which immediately caused a lot of discussion—

"Holy, this isn't a 'case' - what's the matter? Poor ah..."Jin Yuyan's voice was particularly shocking.

"It looks like there's a 'sexual assault' process—" Humane.

"I guess it was done by an 'acquaintance', otherwise it would have been like this - she wouldn't have shouted!"

……

"Everyone listened to Inspector Yu continue to introduce-" Cheng Da said, raising his hand to signal "quiet"!

"Regarding the situation of the corpse, the forensic doctor will explain it in detail later?" Yu Jian said softly:

"From the perspective of the site inspection, we have come to the following analytical conclusions-

First, the process of committing the crime: The suspect entered the room peacefully and had a conversation with the victim Wang Qing, and then killed Wang for some reason, accompanied by sexual assault.

As for 'sexual assault' followed by murder, or 'murder' followed by sexual assault? I can't say for sure at this time. After committing the crime, the suspect took the keys to the deceased's battery car and fled the scene on a bicycle.

Second, the on-site traces and physical evidence: first, it was found that 1 suspicious fingerprint was extracted, which has been entered into the fingerprint automatic identification system - for comparison and screening, once the preliminary comparison results come out, we will further manually compare and confirm?

The second is to find a 'Peak' brand sneaker footprint, size 40. Yang Yongjun and Xiao Wang of the Arrow Mountain Institute of our exploration team are visiting the shoe store in the city?

According to the current search, the sneakers are available at the Peak store - it was last winter.

Third, the deceased's mobile phone, cash and other valuables are all there, and no keychain was found? According to the analysis, Wang Qing's home keys and battery car keys are likely to be strung together and taken away by the suspect.

The third point is the 'portrait' of the suspect: male, about 170 cm tall, medium build, familiar with Wang Qing. I tend to think that it is the 'gray jacket man' who appeared at the scene.

Zhang Ju, that's all for the current on-site investigation—"

"Hmm-" Zhang Ju squinted and asked:

"Is there anything you don't know about the scene - can you mention it?"

Everyone here is silent, and they don't understand on-site investigation and forensic technology, and they have two clear points in their hearts:

First, Wang Qing's death case was a sexual assault and homicide case; The second is that the acquaintance "gray jacket man" is the murderer.

Someone thought directly from this-

The case is simple! Use all kinds of videos to "chase" the man in the gray jacket out, arrest and bring him to justice, and the truth will be revealed!

Some people think of a deeper level -

If it's so "simple", why do you need to transfer so many people? There must be something else going on...

Cheng Da took a look - there was no movement, and said:

"Tell the medical examiner—"

"Trouble boy to change the projection to 'autopsy photo'—" Doctor Zeng left his seat, walked to the curtain, and pointed to the deceased:

"The whole body is relatively fresh. We performed an autopsy at the scene, followed by a systematic autopsy this morning. Forensic Dr. Chen, an expert from the Municipal Bureau, gave full guidance—

The specific autopsy process - I will not go into it all here. The following is an explanation of the main problems to be solved by forensic medicine:

The time of Wang Qing's death was about 4 hours after the last meal.

The cause of death - is death by mechanical asphyxiation. In layman's terms, it means that people's airways are blocked, and long-term lack of oxygen causes death. Covering the mouth and nose, pinching the neck - it can all be formed. One thing is certain: there were no groundbreaking wounds on the deceased's body, and they were not killed by 'trauma'.

We cut the nails of the deceased, wiped the 'key parts' on the corpse, and extracted biological samples for poisoning and pathological examination. All this physical evidence should be sent for inspection in a timely manner?

Personally, I think that the 'nature of the case' tends to be a sexual assault and homicide case; ”

Zeng Jingxian finished speaking, and walked back to his seat-

At the previous technical meeting, Forensic Chen combined the autopsy and the scene to analyze and reproduce the victim's "way of death":

During the autopsy, Chen Longping found that there were trace yarn fibers attached to the outside of the deceased's mouth and nose, which may have been left by the perpetrator wearing gauze gloves to cover Wang Qing's mouth and nose? If the judgment is correct, the murderer is premeditated and has anti-detective awareness; Or there is a habit of "wearing gloves" - which is normal in the middle of winter.

When revisiting the scene, Dr. Chen noticed a pillow placed on the inside of the west bed. After repeated observation, he found that there was a 10cm*15cm wet area in the middle of one side of the pillow, and there was a small break in the area. Is this "little hole" original?

Ai Chunguang immediately found the proprietress and asked, Wang Lunyu said - 3 days ago, when she made the bed, the two pillowcases were good, if there was a hole, it would have been replaced with a "new one"!

Chen Longping thought of the protruding "tiger teeth" in Wang Qing's mouth, and then made a comprehensive judgment: The victim Wang Qing was covered to death by the murderer through the pillow!

- Ginger is still old and spicy!!

In view of this detail, which is extremely important for screening the confessions of criminal suspects, Zhang Ju demanded "strict confidentiality" - not to be released at the case analysis meeting...