I am a super cop

Chapter 510 Lu Weiwei is a Genius
Gu Chen ignored him and continued to make various deduction in the notebook.

Although Liao Feng's words can be used as a reference, Gu Chen can't believe them all. After all, his answer gave Zhang Hao, who was the most likely murderer, instant alibi.

But in order to verify the authenticity, Gu Chen had to go to the scene to investigate in person to determine whether what Liao Feng said was true and whether he was really not favoring Zhang Hao.

But looking back, if Liao Feng really wanted to favor Zhang Hao, why did he tell himself about Zhang Hao, Gao Cheng and Han Jing?
He can pretend to be deaf and dumb.

Therefore, it was difficult for Gu Chen to judge for a while, so he could only say perfunctorily: "It is not clear at present, since you said that you all ate out all night, can you tell me where you ate, and The specific time."

"Of course." Liao Feng readily agreed.

After Professor Zhang came back, Professor Zhang and Liao Feng were immediately accompanying him in the entire ward.

So Gu Chen, Lu Weiwei and Police Officer Wang briefly explained to them, saved the photos of Liao Feng and Zhang Hao, and then left the scene.

Drive fast.

When everyone found the restaurant according to the address provided by Liao Feng, the three got out of the car immediately to investigate the surrounding environment.

Fortunately, the roadside monitoring can cover the entrance area of ​​the store, and it is already past midnight at this moment, and the store has already closed.

Therefore, Officer Wang could only make a duty call to the dispatch room, and after explaining the situation, he sent photos of Liao Feng and Zhang Hao.

Ask the police officer on duty in the dispatching room to help find out the time range of Liao Feng and Zhang Hao's appearance within a specific time range.

About ten minutes later, Officer Wang's phone rang suddenly.

"Hello? I'm Old Wang."

"You found it, right? Well, send it over quickly."

"Yes, yes, especially the time of entering and exiting the store, as well as the front and rear doors of the store. You all check carefully for me to see if there is any exit from the back door. Yes, I want it right away, okay."

After a brief communication, police officer Wang received a lot of messages in WeChat on his mobile phone in an instant.

Gu Chen and Lu Weiwei immediately went up to check.

The colleagues in the dispatching room are very efficient, and some texts will be edited as reminders at the top of each video screen.

The text above the first video is about the time of entering the store.

After clicking on it, everyone found that Zhang Hao was driving a white car and parked in the parking space at the entrance of the store, and five people got out of the car immediately, including Liao Feng.

After a few people stopped at the door for a short time, they walked in with their shoulders crossed.

"Look at the second video." Lu Weiwei couldn't wait any longer, and hurriedly urged Officer Wang.

"Don't worry." Police Officer Wang continued to click on the next video after returning.

The edited text at the top of the second video shows the time when several people left the restaurant.

It can be seen from the screen that Liao Feng did come out of the restaurant with Zhang Hao and three other companions rubbing their bellies.

The few people still chatted a few words at the entrance of the restaurant, and then dispersed.

Liao Feng left first, he stopped a taxi by the side of the road and left.

Afterwards, the three companions also left in different vehicles. Zhang Hao was the last one. He had some quarrels with the driver of the adjacent vehicle over parking.

At this time, the comrades in the dispatching room sent a voice message.

Officer Wang directly clicked play.

【Old Wang, we checked all these five people for you. They never left the restaurant from the time they entered the restaurant to the time they left the restaurant. Phew——】

After listening to the voice message, Police Officer Wang also held down the voice button, said "thank you" and put the phone back.

Lu Weiwei frowned slightly, and said: "It seems that Liao Feng is not lying, they are indeed dining in the restaurant tonight, and they haven't come out all this time."

"Could it be that we made a mistake in the direction of our investigation?" Gu Chen shook his head, and said with a self-deprecating smile: "Just now there was a suspect who could be suspected, but now that we investigate, the suspect is immediately cleared."

"Then what can I do?" Police Officer Wang spread his hands, helpless.

All leads seem to be broken now...

Gao Cheng, who is still lying in the intensive care unit, seems to be very popular and has not offended anyone.

And in the entire Nanshan laboratory, it was only because of Han Jing's affairs that he had something to do with Zhang Hao.

But now it seems that what happened tonight has nothing to do with Zhang Hao at all.

Gu Chen walked back and forth in front of the police car, without thinking, and said again: "Senior Brother Wang, Senior Sister Lu, I want to go to the laboratory again."

"Are you still going?" Lu Weiwei doubted.

Gu Chen nodded: "It is necessary to go, maybe we still have clues that we missed earlier."

"Okay." Officer Wang didn't have a clue now, and he was simply going to return to the scene with Gu Chen, and maybe he could find something new.

Driving the police car, the three returned to Nanshan Laboratory.

At this moment, it is already three o'clock in the morning.

When Gu Chen came to the iron gate and knocked, an old man in the duty room put on his coat slowly, and took a flashlight in his hand to shine a light on the window.

When he found out that it was three policemen, he immediately opened the door of the duty room and came over to open the door for several people.

"Comrade police, are you here again?"

"Master, I disturbed your sleep." Gu Chen said.

After the doorman opened the door, he waved his hand and said, "Why don't you bother or not, you police are lucky."

"We're going to the laboratory to investigate, the one tonight." Lu Weiwei said.

The uncle nodded: "I know, you go in. When you come out later, just knock on the window of my duty room, and I will open the door for you."

"Thank you, sir." Lu Weiwei said.

The three continued to walk forward, but Gu Chen suddenly turned back to the duty room halfway through, and asked the old man, "Master, you are on duty tonight, did you hear the explosion in the laboratory?"

"No." The doorman shook his head and said, "It's cold outside. I've been looking at my phone in the duty room. Apart from the movement at the door, I don't know what's going on inside the lab."

"Besides, these young people often make big noises in the laboratory. As long as no one is killed, I basically don't care."

"Okay, thank you, sir." Originally, he wanted to inquire about some news from the guard, but it seemed that it was still futile, so Gu Chen had no choice but to give up.

Arriving at the scene of the incident, Lu Weiwei directly took out the key given by Professor Zhang and opened the door of the laboratory.

Then tear off the cordon and turn on the laboratory lights.

Suddenly, the familiar scene reappeared.

Lu Weiwei and Police Officer Wang put on their gloves and footmuffs a little boringly, and continued to conduct inspections inside the laboratory.

Gu Chen stood at the door, closing his eyes and thinking.

Soon, Gu Chen's mind was spinning.

He opened his eyes again and saw that everything in the laboratory was as before, and all kinds of utensils were neatly arranged.

Gao Cheng was sitting quietly at the desk alone, and began to sort out the experimental materials.

Gu Chen walked gently to his side, and chose to sit down at the opposite side of Gao Cheng, keeping his eyes fixed on Gao Cheng.

"Now in the laboratory, only Gao Cheng is on duty, and he has not carried out the experiment, but what happened to the explosion?"

Thinking of this, Gu Chen suddenly snapped his fingers, and instantly, there was a violent explosion in the quiet laboratory.

Gu Chen's eyes went dark, and he could only hear the sound of various glass shards falling, smashing the ground with crackling noises.

Gu Chen snapped his fingers again...

At this time, Gao Cheng had already fallen to the ground, and various pieces of glass were stuck in various parts of his body.

Gao Cheng lay on the ground struggling in pain.

He wanted to call for help, but at this time he was seriously injured, and his voice seemed to be difficult to reach outside.

At this moment, wounds were pierced everywhere on the body, and bright red blood flowed out instantly.

The surroundings of Gao Cheng's body slowly turned bright red.

He struggled a few times, and his breathing became weaker and weaker until he slowly closed his eyes.

Gu Chen snapped his fingers, and the whole space suddenly froze.

"It's still glass, but what's the matter with no flammable and explosive items? Could it be an explosion caused by pressure?"

Thinking of this, Gu Chen suddenly remembered that when he inspected the laboratory before, he found the big rock and the knotted piano wire tied on the glass bottle cap, and his whole body was full of thoughts.

"Is this all accidental?" Gu Chen frowned: "No, it's not accidental, these things that seem to have nothing to do with the laboratory will never appear here for no reason, someone must have brought them in. "

"But who could it be? What was his intention? Why did he do it?"

Gu Chen continued to use his master-level reasonable reasoning to gather these fragmentary clues together and freely combine them.

But suddenly, Gu Chen seemed to think of something again, and his whole heart skipped a beat.

"Yes, I picked up a fragment before, and that fragment smelled like alcohol, which is strange."

Gu Chen suddenly added the alcohol element into the conditions under the influence of his master-level reasonable reasoning, and continued to combine.

"There was no dangerous nitroglycerin, no gunpowder, and no trace of burning. How did this explosion happen? Could it be related to alcohol?"

"But how did the alcohol explode suddenly? Are there other ways that have not been considered?"

Suddenly thinking of big rocks and piano wires again, Gu Chen suddenly smiled: "Yes, these things seem to be used to fix the glass bottle, and it seems to prevent something from overflowing."

It was also at the moment of reasoning that Gu Chen used his specialized memory again, remembering that in the laboratory investigation before, he had found that the bookshelf was wet and still dripping.

"Could it be that the glass bottle filled with water is placed on the shelf?" Gu Chen snapped his fingers instantly.

At this moment, a large glass bottle immediately appeared on the bookshelf, and Gu Chen looked back, only one meter away from Gaocheng.

"I know, I know." Gu Chen was overjoyed suddenly, and said with a smile on the corner of his mouth: "This is how Gao Cheng was injured. The glass bottle exploded suddenly, with great power, and all kinds of fragments seriously injured the unsuspecting Gao Cheng."

Gu Chen also used his professional memory to remember that the wound on Gao Cheng's body lying on the hospital bed was indeed on the left side, which matched the position of Gao Cheng's desk and bookshelf.

"In other words, the glass bottle did explode from the bookshelf, but what could it be?"

"Alcohol, water, boulders, piano wire."

After listing the clues found in his investigation, Gu Chen suddenly combined these four elements again.

"First of all, it is a glass bottle. Alcohol is volatile, so it must be contained in the glass bottle, and the piano wire tied to the glass bottle cap must be to fix the bottle cap and prevent the contents from coming out due to pressure."

"There is also that stone, yes, the bottle cap is smooth, and it is difficult to suppress the contents of the bottle, so if a stone is pressed on it, and the stone is firmly tied to the bottle cap with strings, can this be solved? question?"

Gu Chen's thinking was further opened up. The conditions given just now seem to be able to be combined at this moment.

"What does he want? What does the murderer want to do? Alcohol and water, why are they in glass bottles?"

"Also, since the mouth of the bottle is firmly sealed, if the glass bottle wants to blow up Gaocheng into a serious injury, there must be extremely strong pressure in the glass bottle, but..."

Gu Chen's mind is full of water and alcohol now, but he still can't figure it out, how can the two mix together to create such a great pressure?

Or between the two, does it exist in another form?

"The bookshelf is wet and dripping. It seems that the glass bottle must be full of water, but the water will not explode."

"If it wasn't water, what would it be? Could it be ice?"

Thinking of this, Gu Chen suddenly raised his head: "Yes, it's dry ice, yes, it's dry ice."

"Dry ice and alcohol are mixed together, and the temperature can drop to about -80 degrees Celsius. How can I forget this?"

Gu Chen is also using his professional memory to try to recall the materials he checked in the library before.

I did see relevant knowledge at that time, but because of the long time, my memory is a little fuzzy.

But when Gu Chen thought of dry ice and alcohol, that vague knowledge seemed to light up again in an instant.

"Dry ice and alcohol are mixed together, and the temperature can drop to around -80 degrees Celsius, or even lower."

"The composition of dry ice is solid carbon dioxide, which will sublime into gaseous carbon dioxide at room temperature. The chemical reaction is a change in which new substances are formed."

"But when dry ice and alcohol are put together, the dry ice will sublimate and cool down, because the freezing point of alcohol is -117 degrees Celsius."

"While dry ice sublimates heat, the temperature doesn't drop to -117 degrees Celsius, so the alcohol doesn't freeze."

"But alcohol is composed of alcohol molecules, and dry ice is composed of carbon dioxide molecules. These two particles are quite stable and will not recombine to form new molecules, so dry ice will sublimate, and alcohol will still be in a liquid state."

"Dry ice and alcohol will only lower the temperature, down to -117 degrees, isn't that the principle?"

"And the water in the glass bottle freezes, expands in volume, and explodes."

Thinking of this, Gu Chen probably already knew how Gaocheng was injured, so he immediately snapped his fingers.

When Gu Chen opened his eyes again, Lu Weiwei and Police Officer Wang were still searching the room carefully.

But the two seemed to be the same as before, still gaining nothing.

Gu Chen shook his head with a smile, and walked into the laboratory as if nothing had happened.

"Junior Brother Gu." Lu Weiwei, who was squatting on the ground to pick up the glass, turned her head to look at him immediately: "I think there seems to be some alcohol smell left on these pieces."

Putting it on the tip of her nose and sniffing it, Lu Weiwei confirmed, "It's alcohol. This glass bottle must have been filled with alcohol before."

Gu Chen pretended not to know anything, walked to Lu Weiwei indifferently, and then imitated what she did just now, and sniffed the shards of glass on the tip of his nose.

"How is it? Did you smell anything?" Lu Weiwei looked straight at Gu Chen.

Gu Chen's expression was blank, and he said with a surprised face: "Senior Sister Lu, you observed carefully, yes, it smells of alcohol, but alcohol is in a glass bottle, how could it explode properly? Could it be that the alcohol in the bottle under pressure?"

"Why is there so much pressure?" Officer Wang, who was also collecting clues, asked.

Gu Chen shook his head as if nothing had happened, and then asked Lu Weiwei: "Sister Lu, did we find a piece of piano wire tied to a glass bottle cap fragment before?"

"Yes." Lu Weiwei nodded fiercely, and continued to add: "Not only did I find the piano wire, but also a big rock."

"Piano wire? Big rock? The piano wire is still tied to the bottle cap. What is the big rock used for? Could it be that the piano wire is tied with a big rock?" Gu Chen deliberately hinted wildly in front of Lu Weiwei.

Lu Weiwei finally lived up to everyone's expectations. Under Gu Chen's various hints, she seemed to have found some new clues, so she snapped her fingers and said, "I see."

"What do you know?" Officer Wang looked at her curiously.

Lu Weiwei immediately stood up and said loudly: "I just mentioned the problem of the pressure of the glass bottle, and the piano wire tied to the glass bottle cap. I think it is used to tie stones. Something overflowed."

"Amazing, Senior Sister Lu!" Gu Chen looked at her pretending to be surprised, and then thoughtfully recalled: "In this way, the contents in the bottle will definitely explode due to excessive pressure, but what is it? what?"

Gu Chen hurriedly looked at the bookshelf again.

Lu Weiwei also followed Gu Chen's eyes and said casually, "Could it be? Is it water?"

"Perhaps... could it be a solid object of water?" Gu Chen continued to hint frantically.

Lu Weiwei's mind was a little messed up, but she still tried to think hard, and replied weakly: "It can't be ice, can it?"

Gu Chen frowned, and continued to doubt: "But ice and alcohol don't seem to be so powerful? Could it be..."

"Dry...dry ice?"

Lu Weiwei said casually, and Gu Chen seemed to have received a major reminder immediately, and suddenly realized: "Yes, it is dry ice. Mixing dry ice and alcohol, the temperature can drop to -80 degrees Celsius, right?"

"While the water in the glass bottle freezes, the volume will definitely expand. At that time, if the bottle cap is fixed and sealed with piano wire and stones, wouldn't it explode?"

Looking at Lu Weiwei with a confused face, it seemed that he hadn't reacted to Gu Chen's words, so Gu Chen immediately said, "Senior Sister Lu, you are so talented!"

"Yes...is there?" Lu Weiwei was also stunned for a moment, but she immediately laughed again: "Haha, I originally wanted to get along with everyone in the capacity of paddling, but what I got in return were doubts and rumors."

"Okay, I'm not pretending, I'm showing my cards, yes, sometimes I am shocked by my own talent, just so honest."

Officer Wang: "..."

(End of this chapter)