traces of all things

The case has not been solved yet, and the scene is well protected.The faculty and staff in the whole building were all relocated to another physics and chemistry building by the Provincial Normal University. It has been nearly a week since the incident happened, and the school has officially started. After the initial fear, the students have gradually adapted to the explosion. According to the news, the basketball court downstairs was once again bustling, but it seemed that the old physical and chemical building next to it, which had experienced fire and water, became even more desolate and desolate.

Lifting the blockade in front of him, Lu Zheng took Xue Yiwei, and Wei Xiongfeng who had just finished another case at the Provincial Department, carrying the investigation box, and entered the scene again.

Professor Guan Bin's office is pitch-black at the moment. The water sprayed by the fire truck a few days ago has gradually evaporated, and now there are only traces of mud and dust left on the ground.

After re-opening the scene passage, Lu Zheng walked into the center scene stepping on his shoe covers, and expanded to the periphery with the sofa on fire as the center.

Most of the fabric on the sofa and the sponge inside were burned, only a small part remained. There were some scraps of paper left on the sofa, which had been cleaned up and dried by Lu Zheng before. It's in the evidence room.Now the springs are bare and there is nothing.

Lu Zheng turned on the search light and observed carefully again.

The springs were the same, nothing suspicious.

His gaze then shifted to his right. All the offices in this old building of physics and chemistry are of the same standard, with one window facing the wall and the other window facing the corridor. There are curtains on both windows, and the window on the wall is It turned out that the curtains were drawn, but because they were close to the fire source, they were so burned that they fell off. The light green curtains were burned black, and one corner was completely burned, and they lay on the ground in a state of exhaustion.

Lu Zheng opened the curtains little by little with his gloved hands, looked at it with a magnifying glass, and then trembled again.

A white and yellowish thing shook out from a corner of the curtain.

"What is this!" Xue Yiwei had sharp eyes, saw it at a glance, and couldn't help shouting excitedly.

Lu Zheng carefully picked up the thick book-like thing, and looked it over carefully. It looked like a remnant of a printed document after it was burned. It was densely packed with English words, and about half of it was burned. .Perhaps because of its considerable thickness, when the office was on fire, it was rolled inside by the falling curtains, which cut off the outside air, and it was not completely burned, and the words on it were barely legible.

"AsFigure6indicates..." Xue Yiwei, a top student, leaned over and squinted his eyes for a while: "Leader Lu, this seems to be a printed first draft of a thesis, with annotations on it."

"The first draft of the dissertation..." Lu Zheng muttered to himself for a while, opened the half of the dissertation, which was incomplete and stapled together with a long staple, and flipped through it page by page.

Nothing out of the ordinary.

However, Lu Zheng paused when he turned to page 17.

I don't know why, but the content on this page gave him an inexplicable sense of familiarity, as well as a faint premonition——

This incomplete paper booklet should have some connection with the case.

Biting his lip and thinking for a while, Lu Zheng also felt that he couldn't get a clue, so he took out his work notebook and wrote a line of remarks in scribbled handwriting.

"Yiwei, let's put away the evidence for now."

"Good team leader."

Several people searched Professor Guan Bin's office again. They didn't know whether to praise them for their careful investigation from the beginning, or to be depressed that there were no new clues. Except for this burnt and incomplete first draft of the thesis, there was nothing else. Harvested.

"Team leader, what should we do now? Go back to the Municipal Bureau?" Wei Xiongfeng frowned, drooping his eyes, looking pitiful.

Lu Zheng stopped at the corner of the stairs for a while, then suddenly turned his head and walked towards the other end of the corridor: "Don't go back yet, let's check all the offices around the center site."

"Read all of them?" Xue Yiwei was also a little surprised at this time, after all, this is not an ordinary workload, and it seems to him that it is not very necessary.

It's just that the discussion about the nature of the case last time gave him a lot of insight, and he became a little convinced of Lu Zheng's judgment, so he followed without hesitation: "Team leader, where do we start?"

Both of them walked a few steps, Wei Xiongfeng was still in a daze and did not catch up, Xue Yiwei let out a "hey", turned his head and waved at him, with a look of pity for him.

"You follow Team Leader Lu every day, and you don't know how to cherish such a good learning opportunity! I'm really ashamed of you!"

After hearing this, Wei Xiongfeng immediately exploded: "Damn, Xue Yiwei, what are you talking about!"

"If you want to quarrel after finishing your work, calm down." Just when the two of them were on the verge of breaking out, Lu Zheng helplessly helped his forehead and made a kiss: "Hurry up, hurry up, we don't have much time. "

Xue Yiwei and Wei Xiongfeng glanced at each other, "hummed" quite synchronously, and turned their heads away from each other.

**

Lu Zheng decided to order the surveys from inside to outside, from top to bottom. In this way, the first office to be surveyed was the office of Wan Junyi, professor of physics department, on the right hand side of Professor Guan Bin.

"Professor Wan Junyi and Professor Guan Bin are not in the same department. Although their offices are adjacent, they have little or no special contact with each other. When they meet on the road, they just say hello and say good morning. "Wei Xiongfeng has kept complete information on all parties, and at this moment he is showing his skills: "Professor Wan is relatively old and is already in a semi-retired state. He doesn't spend much time in the office, and there is no obvious conflict with Professor Guan Bin."

Lu Zheng nodded, and walked into Professor Wan's office next to him holding the survey light.

Professor Wan and Professor Guan Bin have two styles at first glance. His office is clean and tidy, with a beautiful dark bookshelf, but there are not many books on the shelf, which may be related to his infrequent presence in the office. There is also a pot of asparagus bamboo on it, which has withered after being roasted by the fire scene.

This office was the closest to the crime scene, and the damage was serious. Some of the furniture was damaged to varying degrees, and the walls were also dark.The windows by the hallway had curtains drawn, but not those by the wall.

Lu Zheng rushed to the window next to the wall in three steps and two steps at a time. The windows here were also uniformly equipped with anti-theft railings. An adult man's hand could only extend a forearm at most.Pressing your face tightly against the railing, you can see the window of Professor Guan Bin on the left parallel position.

Lu Zheng checked visually, and the distance is about 1.2 meters. From this position, unless special tools are used, it is almost impossible to open the window on Professor Guan's side. Moreover, according to Nobita's surveillance video, this office was closed at the time of the incident. No one with suspicious items has ever entered or exited.

"It's weird." He rubbed his chin, raised his head and said, "Go, Daxiong, Yiwei, let's go upstairs and have a look."

"Ah? Finished it?" Nobita was still conscientiously flipping through Professor Wan's desk and cabinet, and when he raised his head, his face was full of question marks.

"It's not necessary." Lu Zheng frowned slightly.

Xue Yiwei hurried a few steps to keep up: "Leader Lu, are you looking for a way for Tinder to enter Professor Guan Bin's office?"

Lu Zheng nodded approvingly: "Yes, of course it is also possible that the source of the fire comes from some kind of automatic ignition device in Professor Guan's house, but before that we need to rule out the possibility of the source of fire entering from the outside. It was skipped by us during the investigation.”

"But the surveillance shows that no one approached the office window when it was on fire?" Wei Xiongfeng was a little puzzled.

"So what we need to consider is another window, or other ways." Lu Zheng explained: "The windows next to the wall are equipped with anti-theft railings because the outside is the field outside the school, and there is no surveillance coverage. At that time, Professor Guan’s window was closed, but it was not locked, and theoretically there was a possibility of opening it from the outside.”

Wei Xiongfeng suddenly realized.

Just as they were talking, several people had already climbed up a flight of stairs to the fourth floor. On the day of the incident, the wind was not strong, and the flames and smoke rose in a straight line. As a result, the fire traces on this floor were more obvious than those on the first and second floors below.

"The office right above this belongs to Professor Guan and his colleague from the Faculty of Chemistry, Professor Mei Taihong." Wei Xiongfeng began to report conscientiously: "Professor Mei is 55 years old, and his research direction is similar to that of Professor Guan, both of whom are doing organic methodology. , have always expressed their appreciation for young people like Professor Guan."

Professor Mei's office also looked badly damaged, the side next to the wall was smoky and black, and there were a lot of things in the whole office, all kinds of molecular models, books, documents, tea, everything that one expects to find.

"Speaking of which, this Professor Mei was one of the first two to call the fire brigade to report the fire." Wei Xiongfeng said with great interest, "The other is you, the team leader. It seems that Professor Mei is faster than you." .”

"Him? He was there?" Lu Zheng frowned instantly.

"Yes." Wei Xiongfeng nodded honestly, and flipped through the notebook in his hand: "He is in this office, and his health is not very good on weekdays. He was frightened by the fire, and I heard that he was still in the hospital. .”

Lu Zheng nodded: "You two wait a moment, I'll call the fire brigade."

As soon as the words fell, Lu Zheng took out his mobile phone and walked out the door.

"Yes, that's right, that day, August 25th, around one o'clock in the afternoon, the fire was at the Normal University of Province A."

"The one at the front...is there a recording? Yes, thank you."

The person in charge on the other end of the phone quickly found the phone recording of Professor Mei Taihong that day.

"Cough cough cough... 119? I saw smoke... The old materialization building of our A Provincial Normal University seems to be on fire!... Yes, the westmost office on the third floor is on fire. There are no dangerous chemicals, but Next to it is the laboratory building, there are a lot of dangerous goods... ok, ok, I'll come out of the house right away..."

Professor Mei sounded like he was really not in good health. He coughed for a long time after speaking a few words, and his voice sounded flustered and frightened.

After thanking the person in charge, Lu Zheng hung up the phone thoughtfully.

"Yiwei, let me confirm again. After the site was sealed off, all the offices in the entire building have remained in their original state and have not been moved, have they?"

"I can guarantee this!" Xue Yiwei puffed up his small chest, and assured him with certainty.

"Very good." Lu Zheng nodded: "Call Professor Mei Taihong to see if he has been discharged from the hospital. If he has been discharged, you can inform our brothers to invite him back to the Municipal Bureau."

"Ah?!" Wei Xiongfeng was quite shocked, and opened his mouth wide: "Why do you invite him? Is he suspected of committing a crime?"

Lu Zheng shook his head and laughed: "Not necessarily, but we must ask him to find out why he can still see when he is in the office with both windows closed and the curtains drawn. What about the smoke coming from the fire in Professor Guan Bin's office downstairs?"