traces of all things

"This door lock was removed from Professor Guan Bin's door," Xue Yiwei said. "Professor Guan Bin's office door was burned and the hinges came loose, so the firefighters entered the room without breaking the door lock."

Lu Zheng stepped forward to take a look. It was a very simple old-fashioned bolt door lock. The "L"-shaped bolt was inserted into a "convex"-shaped opening and fixed with screws.Although it is a bit old-fashioned, in general, the anti-theft coefficient is not worse than various new locks.The whole bolt looks strange, like a zebra, with irregular color blocks in circles.

"This kind of lock is a relatively common internal lock in China. It is strong and simple. I don't know if you have heard of the principle of weapon forging? After the metal is calcined at high temperature, it will form 'austenite', which is When this kind of austenite appears, the weapons are all burnt red, easy to forge and shape, and then go through the process of quenching, oh, let me explain, the so-called 'quenching', that is..."

"That means the door is locked when it's on fire." Hearing the buzzing in his ears, Lu Zheng couldn't bear Xue Yiwei's effort to drop his book bag, so he got a little mischievous and interrupted him mercilessly: "In addition, there are iron railings on the two windows of this office, and you cannot enter or exit after locking the door. The fire started at the sofa, far away from the corridor window. Therefore, when the fire broke out, there should be only Guan Bin in the room." The professor is alone, so theoretically the fire should be ignited by the dead, right?"

Xue Yiwei was so choked that he couldn't speak for a moment: "...Yes."

His fair face seemed to have knocked over a paint bottle, yellow, yellow, blue, and purple, like a good student who couldn't control his desire to answer a question and found out that the question was answered by others, and felt aggrieved and panicked.

Wei Xiongfeng hid behind Captain Huang Ying and giggled silently. Although Tang Shaoyuan still had a poker face, if you observe carefully, you can see that the corners of the eyes behind his eyes and the corners of his mouth are uncontrollably curved.

After bullying the young man for a while, Lu Zheng felt slightly relieved, but he was still a little embarrassed after all, and gave Xue Yiwei his respect: "Xiao Xue is very good, with a wealth of knowledge, and solid textbook knowledge."

Xue Yiwei's face became even more exciting.

"Indeed, but it is better to have no books than to believe in books. He is still inexperienced, and he will learn more from Team Leader Lu in the future. Isn't that right, Xiao Xue?" Captain Huang Ying made a final decision. Xue Yiwei seemed quite afraid of her, and immediately demanded Standing up straight like a reflex, although there was still a bit of reluctance on his face, he still answered yes loudly.

"The fire started at about one o'clock in the afternoon. After the smoke filled the window, the students who were active on the playground outside found the situation and called the fire brigade." Huang Ying looked serious: "The cause of the fire is currently unknown. According to the firefighters, the location of the fire is It should be on the sofa, this kind of fabric sofa is quite flammable, and there are a lot of flammable items in the room, such as books, documents, etc., so it quickly spread to the whole office."

Lu Zheng nodded. He was originally the caller, so he knew the approximate time of the fire, but he still had some doubts in his heart: "Is there no automatic sprinkler system in this office building? There is also a smoke alarm. , Why didn’t there be a sound, let the fire expand?”

While speaking, he pointed his mouth at the relatively intact corner of the room, where there was a blackened and deformed round alarm hanging on the wall.

"This building is an old physical and chemical building, and it will be demolished next year. There is no automatic sprinkler system installed in it." Xue Yiwei cheered up and joined the case report: "In fact, every teacher's office has a smoke alarm installed. This The room is no exception, but we just took the alarm off to check, and there is no battery in it. According to Professor Guan Bin’s students, Professor Guan has the habit of smoking while reading literature, because the smoke alarm always sounds and feels It was very annoying, so I removed the battery inside."

"From this point of view, it is possible that Professor Guan took a nap in the office and smoked a cigarette before going to bed. Unexpectedly, he fell asleep without extinguishing it. The cigarette butt ignited the sofa under him?" Wei Xiongfeng listened to Xue Yiwei's narration , I immediately felt that this process made perfect sense.

"There is indeed such a possibility, and it is very large." Xue Yiwei said with confidence, "especially when the forensic doctor conducted the on-site inspection just now, Professor Guan's head, neck and chest There were no obvious wounds, and there was a lot of soot in the mouth and nose, which is also evidence of being burned before death."

Lu Zheng nodded thoughtfully.

According to this, it is true that the possibility of an accident is extremely high, doors and windows are not allowed to enter, the fire is far away from the window, and there is only Guan Bin in the office-all these point to the same conclusion.

"Was Professor Guan Bin's body found on the remnant of the sofa?" He asked, "What was the original posture like? Can you show me the photo?"

"That's no problem." Xue Yiwei said as he called for the accompanying criminal photographer to retrieve the photos from the SLR.

Lu Zheng and Tang Shaoyuan moved closer to the preview screen, zoomed in with two fingers and observed carefully.

Professor Guan's body was completely blackened, and he was curled up on the pile of springs that turned out to be a sofa, in a posture as if he was about to punch a boxer.

It does look like a very typical corpse of an accidental death at the scene of a fire.

But for some reason, Lu Zheng always felt that there was something wrong with this scene.

**

But Xue Yiwei was right, there really wasn't much valuable content in this office.

The site was sprayed with fire and water, and it was almost impossible to see it. Lu Zheng rummaged in the sewage for almost an hour with a colander, but found nothing important. Now that it was too late, it was no longer suitable for on-site investigation activities. Don't regret it for now.

A group of several people stopped working temporarily, Lu Zheng took off his gloves and ran all the way to find Geng Zhizhong: "Boss, where is Shao Yuan?"

"I went to the Physical Evidence Center for an autopsy." Geng Zhizhong said, "What's wrong?"

Lu Zheng frowned slightly: "Boss, I have a special feeling about this scene, and I always feel that things are not that simple."

Geng Zhizhong immediately became serious when he heard it: "Did you find anything?"

Lu Zheng seemed to be choking, a little embarrassed: "...No."

Geng Zhizhong: ...

Looking at Geng Zhizhong's expression of "you're teasing me", Lu Zheng also felt quite ashamed, but he continued cheekily: "I want to go to Shao Yuan to see the body and see if I can find other traces and evidence. "

There is nothing wrong with this, Boss Geng waved his hand and called Wei Yiyizhuan Xiongfeng: "Daxiong, run one more leg, and lead your team leader to the dissection room!"

Wei Xiongfeng, who thought this was not a criminal case and could end work earlier, was overjoyed when he heard the bad news, and couldn't help but howl.

**

Provincial City Public Security Bureau, Physical Evidence Center.

The person who came to greet him at the door was one of several assistants assigned to Tang Shaoyuan by the Provincial Urban Bureau. He should be responsible for recording the autopsy or taking pictures. Wei Xiongfeng withdrew after sending Lu Zheng to the place.Lu Zheng looked up in the night, the whole building was gloomy in the dark, it looked like a big coffin.

The forensic anatomy room was in the depths of the physical evidence center. Following the little assistant all the way through the dark corridor, Lu Zheng's feeling of walking in a large coffin became stronger.

When he entered the dissecting room, the light almost made his eyes sour and tears flowed at that moment.

Tang Shaoyuan was standing in the brightest beam of light, his body was tightly wrapped in a light blue translucent disposable surgical gown, and inside the clothes was a white shirt with thin vertical stripes, which set him off again. Delicate and tall, even with a hat and mask, he stands out from the crowd of assistants.

There was a strong smell of meat paste in the room.

This is the first time that Lu Zheng has seen Tang Shaoyuan perform an autopsy, and he saw that he was very nimble. He was sawing off the scalp of the corpse with a craniotomy saw. There was a buzzing sound, and the red and white brain tissue was exposed under the saw blade. .

"There is no trauma to the head." He said calmly, and motioned his assistant to write it down: "Take out your tongue, double insurance."

After all, Lu Zheng saw that he used an extremely skillful technique to cut off all the muscles along the jawline of the corpse, then dug his fingers into the mouth of the corpse, moved his other hand twice, and put the whole set of muscles together. The internal organs and corpse were separated.

"There is carbon ash in the mouth and respiratory tract, and the blood and internal organs of the deceased are cherry red." Tang Shaoyuan observed thoughtfully: "It is true that he was burned to death during his lifetime. There were no restraints on the legs and hands, and there were no wounds in several wounds." There are no other fatal injuries in the body."

Lu Zheng didn't make a sound to disturb them. After watching them complete the autopsy, Tang Shaoyuan stepped forward after he had re-sewn the internal organs and body: "It seems that this is not a case?"

"It really doesn't look like it." Tang Shaoyuan looked up and found Lu Zheng coming, his eyes lit up: "But just to be cautious, I will do a toxicology test later. Why is senior brother here?"

"I didn't find any physical evidence at the scene, so I want to come over to see if there is any on the body." Lu Zheng smiled, and put down the investigation box in his hand: "Are you all done?"

Tang Shaoyuan nodded naturally, turned around and ordered a few assistants to write the autopsy report, and then stayed alone in the autopsy room with Lu Zheng.

In order to prevent the physical evidence from being contaminated again, Lu Zheng also had to wear protective clothing. Tang Shaoyuan took off his gloves and unwrapped a new surgical gown for him. He shook it and stretched it out: "Come on, brother, stretch it out." arm."

For some reason, Lu Zheng's mind was full of the words Tang Shaoyuan said to him when he was in Dayu before, holding a washbasin filled with water: "Come on, senior brother, lift your feet."

Obediently stuffing his two arms into the surgical gown, Lu Zheng couldn't help but joked when he heard Tang Shaoyuan's rustling and knotting sound behind him, "Shao Yuan, do you have younger brothers and sisters at home?"

"In theory." Tang Shaoyuan thought for a while and said a very strange answer: "But I have never seen it. Why did the brother suddenly ask this?"

"It's nothing." Hearing his answer, Lu Zheng thought of Tang Shaoyuan's usual son-in-law style, and couldn't help imagining a lot of grievances and illegitimate children: "I just think you are good at taking care of people. "

"Hehehe." Tang Shaoyuan chuckled, and continued to bury his head behind Lu Zheng, tying the knot on his waist. The two light blue strings were slowly tightened in his palms, and gradually tightened. The shirt of the person in front of him slowly retracted again, and finally stopped at a suitable level that was neither loose nor tight.

Looking at the waist in front of him, Tang Shaoyuan couldn't help his beating heart, and secretly gestured with his hands.

"It also depends on the person." He whispered, "I don't want to take care of everyone."