Gu Chen ignored him and continued to make various deductions in the transcript.

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

But if in order to verify the truth or falsehood, 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 biased against Zhang Hao.

But looking back, if Liao Feng really wanted to favor Zhang Hao, then why did he tell himself about Zhang Hao, Gao Cheng and Han Jing?

He can pretend to be deaf and dumb.

Therefore, Gu Chen couldn't judge for a while, so he could only say perfunctorily: "It's not clear at the moment, since you said that you were eating out all night, can you tell me where you dined, there is still a specific time." ”

"Absolutely. Liao Feng readily agreed.

After waiting for Professor Zhang to come back, Professor Zhang and Liao Feng were suddenly accompanying them in the entire ward.

So Gu Chen, Lu Weiwei and Officer Wang, after simply explaining to a few people, saved the photos of Liao Feng and Zhang Hao, and then left the scene.

Drive all the way.

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

Luckily, roadside surveillance can cover the storefront area, and it's already past the wee hours of the morning, and the store is already closed.

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

Let the police officer on duty in the dispatch room help find the time frame in which Liao Feng and Zhang Hao appeared within a specific time range.

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

"Hey, I'm Wang. ”

"You found it, right? Okay, send it over. ”

"Yes, yes, especially when you enter the store, there is still some time to come out, and there is the front and back doors of the store, you all check carefully for me to see if there is any situation of leaving through the back door, yes, I want it soon, okay." ”

After a brief communication, Officer Wang's mobile phone WeChat received a lot of information in an instant.

Gu Chen and Lu Weiwei immediately went up to check.

The colleagues in the dispatch room are very efficient, and at the top of each video, some text will be edited to prompt.

The text at the top of the first video is about the time to enter the store.

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

After a short pause at the door, they walked in with their shoulders hooked.

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

"Don't worry. After Officer Wang returned, he continued to click on the next video.

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

It can be seen from the picture that Liao Feng did come out of the restaurant with Zhang Hao and three other companions at that time.

A few people were still chatting at the door of the restaurant before they dispersed.

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

After that, the three companions also left in different vehicles, and finally Zhang Hao, who also had some quarrels with the drivers of adjacent vehicles over the parking issue.

At this time, a voice message was sent from the comrades in the dispatch room.

Officer Wang clicked play directly.

[Lao Wang, we have checked these five people for you, they have never left the restaurant from the beginning of entering the restaurant until they come out of the restaurant, huh-]

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

Lu Weiwei frowned slightly, and said, "It seems that Liao Feng is not lying, they did dine in the restaurant tonight, and they never came out." ”

"Could it be that we made a mistake in the direction of our investigation?" Gu Chen shook his head and laughed self-deprecatingly: "There was a suspect who could be suspected just now, but now that the investigation is made, the suspect is directly whitewashed." ”

"Then what's the solution?" Officer Wang spread his hands, helpless.

Now all the clues seem to have been broken......

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

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

But now it seems that tonight's incident has nothing to do with Zhang Hao at all.

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

"Do you want to go?" Lu Weiwei wondered.

Gu Chen nodded: "What we have to go to may be the clues we missed before." ”

"Okay. "Officer Wang doesn't have a clue now, so he is simply preparing to return to the scene with Gu Chen, and maybe he can find something new.

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

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

When Gu Chen came to the iron door and knocked on the door, an old man in the duty room slowly put on his coat and took a flashlight in his hand to take a picture at 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 policeman, here you go again?"

"Uncle, I'm disturbing your sleep. Gu Chen said.

After the doorman opened the door, he waved his hand and said, "What's not to disturb here, you police are happy." ”

"We're going to go to the lab and investigate, the one tonight. Lu Weiwei said.

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, uncle. Lu Weiwei said.

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

"Nope. The doorman shook his head and said, "It's cold outside, I've been looking at my phone in the duty room, except for the movement at the door, I don't know the situation in the laboratory." ”

"Besides, these young people often make big noises in the laboratory, and as long as they don't kill anyone, basically I don't care. ”

"Okay, thank you, uncle. "Originally, I wanted to ask the doorman for some news, but it seemed that it was still in vain now, and Gu Chen had no choice but to give up.

When she came to the place where the incident occurred, Lu Weiwei directly took out the key given by Professor Zhang and opened the door of the laboratory.

Then the police cordon is dead, and the laboratory lights are turned on.

Suddenly, a familiar scene reappeared.

Lu Weiwei and Officer Wang, a little boringly, put on the gloves and foot covers, and continued to conduct an examination inside the laboratory.

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

Soon, Gu Chen's mind was spinning.

When I opened my eyes again, everything was in the lab as before, and all kinds of utensils were neatly arranged.

Gao Cheng sat quietly at his desk and began to sort out the experimental materials.

Gu Chen walked to his side lightly, and chose to sit down in the opposite position opposite Gao Cheng first, his eyes kept staring at Gao Cheng.

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

Thinking of this, Gu Chen suddenly snapped his fingers, and in an instant, a violent explosion sounded in the quiet laboratory.

Gu Chen's eyes were dark, and he only heard the sound of various glass debris falling, smashing the ground crackling.

Gu Chen snapped his fingers again......

By this time, Gao Cheng had fallen to the ground, and various fragments of glass were pierced in various parts of his body.

Gao Cheng lay on the ground and struggled in agony.

He wanted to call for help, but at this time he was not lightly injured, and his voice seemed to be difficult to reach outside.

At this moment, wounds were pierced in various parts of the body, and bright red blood flowed out instantly.

The area around Gao Cheng's body slowly turned red.

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

Gu Chen snapped his fingers, and the entire spatial picture suddenly froze.

"It's still glass, but what happens when there's no flammable or explosive material? Is it because of the pressure?"

Thinking of this, Gu Chen suddenly remembered that when he checked the laboratory before, the big stone he had found, as well as the knotted piano wire tied to the glass bottle cap, and the whole person was also surging with 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 it in." ”

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

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

But suddenly, Gu Chen seemed to remember something again, and his whole heart chuckled.

"Yes, I picked up a piece of shard before, and it smelled like it smelled of alcohol, which is weird. ”

Gu Chen suddenly added alcohol to the conditions under the effect of his master-level reasoning and continued to combine.

"There was no dangerous nitroglycerin, no gunpowder, no traces of burning, so how did this explosion happen?

"But how did the alcohol explode all of a sudden? Is there any other way that hasn't been taken into account?"

Suddenly thinking of the big stone and piano wire, Gu Chen suddenly smiled: "Yes, these things seem to be used to fix the glass bottle, it seems that they are to prevent something from overflowing." ”

It was also at the moment of reasoning that Gu Chen used his specialization-level memory again, remembering that in the previous laboratory investigation, he had found that the bookshelves were wet and still dripping.

"Could it be that the glass bottle with water is placed on the bookshelf?" Gu Chen snapped his fingers in an instant.

At this moment, a large glass bottle immediately appeared on the bookshelf, and Gu Chen looked back and saw that it was only one meter away from Gao Cheng at this time.

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

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

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

"Alcohol, water, big stones, piano wires. ”

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, it must be contained in the glass bottle, and the piano wire tied to the glass cap must be to fix the cap and prevent the contents from coming out due to pressure. ”

"And that stone, yes, the cap is smooth, and it's hard to suppress what's inside the bottle, so if you press a stone on top and tie the stone firmly to the cap with string wires, can that solve this problem?"

Gu Chen's train of thought was further opened, and the conditions he had just given seemed to be able to be combined at this moment.

"What does he want to do? What does the murderer want to do? Why is the alcohol and water in a glass bottle?"

"Also, since the mouth of the bottle is firmly sealed, if the glass bottle wants to blow Gao Cheng into serious injuries, there must be an extremely strong pressure in the glass bottle, but ......"

Gu Chen's mind was full of water and alcohol now, but he couldn't figure it out, how could the two be mixed together to create such a lot of pressure?

Or is there a different form in between?

"The bookshelves were wet and still dripping. It looks like the glass bottle must be filled with water, but the water won't explode. ”

"If it's not water, what would it be? Is it ice?"

Thinking of this, Gu Chen suddenly raised his head violently: "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 about that?"

Gu Chen was also using his specialization-level memory to try to recall the materials he had consulted in the library before.

At that time, I did see the relevant knowledge, but due to the long time, my memory was a little blurred.

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

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

"The composition of dry ice is solid carbon dioxide, which will sublimate into gaseous carbon dioxide at room temperature, and the chemical reaction is the change of the formation of new substances. ”

"But when dry ice is put together with alcohol, it sublimates and cools down, because the freezing point of alcohol is -117 degrees Celsius. ”

"Although dry ice sublimation is endothermic, the temperature does not drop to -117 degrees Celsius, so the alcohol does not solidify. ”

"But alcohol is made up of alcohol molecules, and dry ice is made up of carbon dioxide molecules, and both particles are quite stable and don't recombine to form new molecules, so dry ice will sublimate, and alcohol will still be liquid. ”

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

"And the water in the glass bottle froze and expanded, which exploded. ”

Thinking of this, Gu Chen probably already knew how Gao Cheng was injured by the explosion, so he immediately snapped his fingers.

The world was spinning in front of him, and when Gu Chen opened his eyes again, Lu Weiwei and Officer Wang were still carefully searching in the room.

But the two of them seem to be the same as before, and they still have nothing to gain.

Gu Chen shook his head with a smile and walked into the laboratory pretending to be nothing.

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

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

Gu Chen pretended not to know anything, walked to Lu Weiwei's side indifferently, and then followed her example just now, and also put the glass fragment on the tip of his nose and sniffed.

"How is it, did you smell anything?" Lu Weiwei looked at Gu Chen with straight eyes.

Gu Chen's expression was stunned, and he said with a look of surprise: "Senior Sister Lu, you have observed very carefully, yes, it smells of alcohol, but alcohol is contained in a glass bottle, how can it explode so well? Is there pressure in the bottle?"

"What kind of pressure is so great?" asked Officer Wang, who was also collecting clues.

Gu Chen shook his head casually, and then asked Lu Weiwei, "Senior Sister Lu, have we found a piano wire tied to the fragment of a glass bottle cap before?"

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

"Piano filament, big stone, piano filament is still tied to the bottle cap, what is the big stone used for? Could it be that a big stone is tied to the piano filament?" Gu Chen deliberately hinted frantically in front of Lu Weiwei.

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

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

Lu Weiwei immediately stood up and said loudly: "I mentioned the pressure of the glass bottle just now, and the piano wire tied to the glass bottle cap, I think it is used to tie stones, and the effect must be to prevent the contents of the glass bottle from overflowing." ”

"Awesome, Senior Sister Lu!" Gu Chen pretended to look at her with a surprised expression, and then recalled thoughtfully: "In this way, the contents of the bottle will definitely explode due to excessive pressure, but what is it?"

Gu Chen hurriedly looked at the bookshelf again.

Lu Weiwei also said casually according to Gu Chen's eye prompts: "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 confused, but she still thought hard, and replied weakly: "It can't be ice, right?"

Gu Chen frowned and continued to wonder, "But ice and alcohol don't seem to be so powerful......, right?"

"Dry ...... Dry ice?"

Lu Weiwei said casually, Gu Chen seemed to have received a major prompt immediately, and suddenly realized: "Yes, it's dry ice, dry ice and alcohol are mixed together, and the temperature can drop to -80 degrees Celsius, right?"

"And the water in the glass bottle will freeze, and the volume will definitely expand, and at that time, if the cap is sealed with piano wire and stone, won't it explode?"

looked at Lu Weiwei, who looked confused, and didn't seem to have reacted from Gu Chen's words, Gu Chen immediately said again: "Senior Sister Lu, you are too talented!"

"Yes...... Is there one?" Lu Weiwei was also stunned for a moment, but she immediately laughed again: "Haha, I wanted to live in harmony with everyone as a paddling, but in exchange for doubts and rumors." ”

"Okay, I don't pretend, I have a showdown, yes, sometimes I'm shocked by my own talent, it's just that honest. ”

Officer Wang: "......"

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