traces of all things

The conference room fell silent again for a moment.

A drop of sweat dripped slowly from behind Xue Yiwei's ears, and he felt palpitations for a while under Lu Zheng's gaze.

Fortunately, the brain was still running fast, and Xue Yiwei tapped twice on the table with his fingers, not to be outdone: "Leader Lu's conclusion is still too hasty. First of all, let's not talk about whether the dark blue fibers in the professor's abdomen are the same or not." A jacket is left behind, maybe Professor Guan was wearing a dark blue dress on the day of his death? Let’s just talk about these glasses—”

The more he spoke, the more confident he became, and his voice became more and more sonorous and powerful. He even pushed his glasses: "I am short-sighted, and sometimes I doze off and forget to take off my glasses. What's more, This situation further confirmed my inference—Professor Guan accidentally fell asleep and ignited the sofa, if he still consciously took off his glasses, then he would consciously put out the cigarette butt.”

Xian Hongru, who had been onlookers, nodded slowly, seeming to agree with Xue Yiwei's reasoning.

The balance in the house began to tilt towards "accidents" again.

Suddenly there was a sound of "哧啦—" Lu Zheng raised his eyes and saw that it was Tang Shaoyuan leaning forward with his elbows on the table: "I think our team leader's view is more reasonable."

While talking, he helped his glasses frame: "According to the information provided by Professor Guan Bin's colleagues and family members, Professor Guan's degree of myopia is very deep, with a degree of more than 2000 degrees. I have also worn lenses of nearly [-] degrees. It is very heavy, and the foreign body sensation is strong. It is very difficult to carry it to sleep without knowing it."

Xue Yiwei had a dumbfounding expression on his face: "Forensic Doctor Tang, you can eat things indiscriminately, but you can't talk nonsense. I can only see your glasses at most two or three hundred degrees, and you can't do laser correction for high myopia. If what you said is true , I would like to ask you about eye care."

Tang Shaoyuan leaned back on the stool, with a half-smile on his face: "I said 'wear it'. Mr. Xue, haven't you heard of ICL surgery?"

Xue Yiwei fell silent. In fact, he hadn't heard of it, but Xueba's self-esteem made him not want to admit it.

Seeing the topics in the meeting room getting farther and farther away, Xian Hongru coughed twice to draw everyone's attention back: "I don't think the issue of glasses is enough to be used as conclusive evidence."

Hearing this, Lu Zheng leaned forward and pushed the two photos to the middle of the conference table: "Then what about these two?"

"The photo on the left shows two pieces of cloth found under the armpits of Professor Guan Bin's corpse. The body in the fire was blocked by the underarm skin and the temperature was relatively low, so some clothing fragments were preserved. From these two fragments, it is obvious that , Professor Guan Bin was wearing red striped clothes that day, Xiao Xue’s claim that Professor Guan was wearing dark blue clothes on the day of his death is not true.”

As Lu Zheng said, he pushed a photo on the right to the front: "As for this photo, it was taken in Professor Guan's office after the fire. Professor Guan has a habit of smoking. Look at the ashtray on the table."

The ashtray pointed at by his finger was not completely burned, but one side was blackened by smoke, and there were dense cigarette butts stuffed in the ashtray.

"...Old smoker." Wei Xiongfeng muttered.

"According to my inquiries with the deceased's colleagues and students, Professor Guan only has one ashtray in his office, and it's the one on the desk." Lu Zheng stood up while talking, walked around with his hands behind his back, and put the The photos were posted on the whiteboard one by one, and he turned around with a slight frown.

"Then here comes the problem." He glanced around the entire office: "Professor Guan is about to take a nap and is covered with clothes, so why doesn't he put the ashtray on the coffee table next to the sofa, and Leave the ashtray on the desk? Is he going to put out the cigarette butt on the coffee table leg?"

**

The meeting ultimately failed to reach a consensus.

Most of the criminal police who attended the meeting felt that although some of the questions raised by Lu Zheng were questionable, they still seemed a little far-fetched.Except for Tang Shaoyuan, who couldn't be persuaded, even Wei Xiongfeng, who was at odds with Xue Yiwei, felt that both sides had some truths.

In the end, Captain Huang Ying, the Iron Lady, spoke.

"Since there are doubts, we will investigate." Captain Huang made a final decision: "Since Team Leader Lu thinks the case is suspicious, let's not let it go."

As a result, the task force was still established, with Lu Zheng as the person in charge to make overall arrangements.

The old building where the fire broke out is very old, and there are no surveillance cameras installed in the corridors.However, Wei Xiongfeng was lucky enough to find a self-installed surveillance system in a residential building outside the campus across the road after wandering around for a few times with a group of younger brothers. The location happened to include the floor where the incident occurred.

"According to the development of the fire, we can start watching from around 11:30." Lu Zheng estimated: "The scale of the fire is not large, but the arsonists may have entered the scene earlier."

Professor Guan Bin's office is at one end of the corridor, which is a semi-open structure, and it happened to appear in the upper left corner of the surveillance video window.

"Okay, no problem."

While Wei Xiongfeng was talking, he was skillfully operating the keyboard with both hands. It didn't take long for the clarity of the video to be improved a lot, and the picture in the upper left corner was also enlarged, and a figure could be vaguely seen.

There was no one passing by in the corridor most of the time. The two started watching at 11:30, and 15 minutes later, a tall and thin figure in a red short-sleeved shirt appeared at the end of the corridor, walking beside him. There is a slightly fat, medium-sized young man.

The two stopped for a while in front of Professor Guan Bin's office.At this moment, Wei Xiongfeng pressed the pause button and quickly zoomed in on the screen.

"This is Professor Guan Bin." Lu Zheng estimated the height and figure of the figure in the video, and said with certainty: "The color of the wine red polo shirt on his body is the same as the fabric found on the corpse."

Wei Xiongfeng took a screenshot of the two of them, and clicked to play it.

In the video, the two seemed to have some conflicts at the door of the office. When the two were talking, Professor Guan seemed very excited. Another fat young man put his hands together, as if he was begging for something.

In the video, Professor Guan waved his hands in a bad mood, turned around and opened the office door. The chubby young man seemed to want to follow in, but Professor Guan slammed the door hard as soon as he entered.

The chubby young man paced around the door of the office a little anxiously, then shook his head and walked away.

At this time, Lu Zheng raised his eyes and looked at the time in the upper right corner of the video. The time was exactly [-]:[-] noon.

"This person looks a bit suspicious, team leader." Wei Xiongfeng clicked his tongue twice, and poked the paused picture on the screen: "It seems that the two people have conflicts."

Lu Zheng nodded slightly: "Print out the screenshot, we will let the investigators investigate the identity of this person later. Continue to broadcast."

The two continued to lie in front of the computer and watch the monitor. After the chubby young man left, the corridor became silent again. The two watched patiently for an hour, and nothing unusual happened.

"Wait!" Lu Zheng suddenly called out, Wei Xiongfeng was so frightened that his fingers trembled and he pressed pause.

"Play it at twice the speed here."

After hearing the instructions, Wei Xiongfeng immediately followed through, and found a problem: "Smoke!"

Lu Zheng looked at the time in the upper right corner again, it was 45:[-].

After that, more and more smoke came out of Professor Guan's window, and after a while, the smoke and fire enveloped the entire office.

The two paused the video again and fell silent at the same time.

Since Professor Guan entered the office, no one else has entered.

Surveillance video seems to verify Xue Yiwei's statement, this should be an accident, not a criminal case.

Wei Xiongfeng was so worried that he lit a cigarette and exhaled a smoke ring: "Leader, what should we do now? Do you want to make a video extension?"

Lu Zheng nodded, then shook his head: "Do it. Pay attention to the people who have entered and left Professor Guan Bin's office from morning to afternoon today."

"Actually..." Wei Xiongfeng said cautiously: "Since Professor Guan entered the office when there was no one in the room, it is impossible for someone else to start the fire..."

There is nothing wrong with what Wei Xiongfeng said. There are windows on both sides of Professor Guan's office. The outside side was closed when the crime happened.

Lu Zheng had a headache and rubbed his forehead.

"Indeed, but in order to be safe, let's do it first, mainly pay attention to whether there are people who enter the office with suspicious items, and rule out the possibility of timing the ignition tool." Speaking of this, he reached out and patted Wei Xiongfeng on the shoulder : "Thanks for your hard work, Nobita, I'll go to Shao Yuan's place to see if there are any new discoveries."

**

"...The person who had a dispute with Professor Guan Bin has been found out. He is a doctoral student in Professor Guan Bin's laboratory, Wang Yong." It was Wei Xiongfeng, who stood in front of the computer and showed the screenshots of the processed surveillance video: "Wang Yong, 26 years old, was a student of the deceased. It is said that the conflict with the deceased was because the deceased criticized his research attitude and claimed to persuade him Retired, but he did not enter Professor Guan's office, he returned to the laboratory after leaving the office building, and there was no other suspicious behavior."

Lu Zheng sat on the side, nodded, and frowned, beckoning him to continue talking.

"We have also extended the video." Wei Xiongfeng looked a little nervous: "Since seven o'clock this morning, a total of three people have entered and exited Professor Guan Bin's office, namely Professor Guan Bin's students Xiong Boyi, Zhou Xuehai, and Guan Bin. Professor Bin's wife, Shi Jingyi. None of the three stayed in the office for more than half an hour, and none of them brought any suspicious items when they entered."

"...The preliminary conclusion is that no suspicious arsonist entered Professor Guan's office in the video, and the fire should have been caused by accident."

After the voice fell, the whole office was so quiet that a needle could be heard on the ground.

Several young scouts secretly looked at Lu Zheng as if they were afraid to show their anger.

A few seconds later, Xue Yiwei, who was sitting in the corner, let out an unknown "hum".