There was a burst of laughter in the conference hall, which made many policemen passing by look curiously before leaving.

Reasoning operations are actually the most skillful, and the knowledge that needs to be used is all-encompassing, even if you are a criminal police officer who has worked for many years, you need to continue to follow up and learn.

Xiao Yang glanced at Gu Chen, and his gaze returned to the reasoning on the question board.

It is said that laymen look at the lively insiders and look at the doorway, and people who are generally good at solving cases can see the true level of a reasoner at a glance.

However, from the perspective of solving the case, the time of the crime is generally placed first, but the motive for killing is also an indispensable option.

In the reasoning given by Gu Chen, both suspects have the possibility of committing crimes, so finding the specific time of death of the deceased is possible to find out the murderer based on the time when the two were not present.

But Gu Chen's entry point is obviously very good.

What amazed Xiao Yang the most was that Gu Chen's analysis of the time of the crime was also accurate.

"Gu Chen, tell me, why did you judge that the time of death was at night?" Xiao Yang asked coldly.

"Because of this photo. Gu Chen took the photo under the colored magnet back to his hand, and then took it to everyone to check it.

Everyone knows that the murderer put the body in hot water to cover up the real time of death, but Gu Chen took the photo to talk about it, which is very incomprehensible.

"Gu Chen, is there anything different about this photo?" A probationary police officer in the queue asked him curiously, "Isn't it just a spider web outside the window on the second floor, stained with a few feathers?"

"That's right, didn't the results of the investigation of this question say, the crime scene was found in the bedroom on the second floor, where there were traces of fierce fighting, and the feather pillow was torn, and the floor of the room was full of white feathers, and occasionally a few pieces floated out of the window, what is so strange about this?"

Another midshipman asked.

Everyone began to look at each other and discuss in a whisper, but in the end, no one said why.

Xiao Yang smiled, he knew that this photo was the key to solving the problem, but Gu Chen did a good job.

Others, on the other hand, don't even think about why.

However, Xiao Yang was not sure if Gu Chen really knew what the problem was, so he asked again: "Gu Chen, tell me your explanation." ”

"Okay. Gu Chen nodded, smiled and said, "I understand it this way, the key to the problem is not the feathers, but the spiders on the trees outside the window." ”

"Spiders?"

Many people said: "The time of the crime has something to do with the spider?"

"yes, spiders can talk? I don't believe it. Lu Weiwei was a little impatient, she hurriedly said: "Senior Brother Gu Chen, don't sell it, tell everyone what you know." ”

"Okay. Gu Chen smiled calmly: "The spider on the big tree has played a key role in the detection of the case, and according to the proportion, it can be seen that this is a bird-catching spider about 25 centimeters long." ”

"This bird-catching spider is more poisonous than ordinary spiders, and it relies on venom to poison the prey after falling into the web before eating. ”

"And this spider's broken web has white feathers on the feather pillow, so I can conclude that the crime was committed at night, because this type of bird-catching spider is mostly nocturnal, and they often weave their webs in the evening and break them the next morning. ”

In this way, everyone quickly understands the time of the crime.

Feathers can be glued to broken spider webs, which only means that the crime was committed at night.

And the murderer is also obvious, that is the gambler Liu mentioned in the title.

"That's not right. Xiao Yang saw that Gu Chen's analysis was accurate, but he deliberately asked in an difficult way: "If it is a feather on the ground, and he floats to the broken spider web outside the window, then the time of the crime, can't it be determined?"

Xiao Yang's questioning immediately aroused the approval of many people.

Reasoning is the most logical, although Gu Chen's ideas are reasonable, but in case of the situation that Xiao Yang said, it will be difficult to judge the reasoning of the time of the crime.

"Gu Chen, your reasoning is not rigorous. Zhao Guozhi, who was standing aside and had been silently paying attention, also spoke at this moment.

However, Gu Chen was not embarrassed, but said with a light smile: "This factor can be ruled out." ”

"Hmm, what do you say?" Lu Weiwei on the side was curious like a primary school monk who listened carefully.

"Because it is affected by the factors of the object's falling trajectory. The data flow in his mind was surging rapidly, and Gu Chen shared what he knew:

"The volume, shape and density of the feather in the title will affect its trajectory as it falls. ”

"General density is a physical quantity that represents the mass per unit volume of an object, the same volume, different densities, the masses are different, objects with different densities fall at the same time in a vacuum, and their trajectories are the same. ”

"And when the density and mass are the same, the trajectory of the falling of the object is different between solid and hollow, pill-like and sheet-like, which is mainly related to the magnitude and direction of the air resistance it is subjected to, so the situation you are talking about will not appear. ”

The crowd was amazed again.

Speaking of this, Xiao Yang was already very satisfied, and he used many misleading clues, but Gu Chen was able to successfully avoid them.

Perhaps, this is Gu Chen's talent in some aspects, but in the criminal investigation team, this is an important technique for solving cases.

The various cases that the criminal investigation team has to face will always make people scramble, but the most headache is the time to commit the crime.

Especially in the face of all kinds of cunning criminals, they often have strong anti-reconnaissance capabilities.

Xiao Yang has participated in countless large and small cases in the criminal investigation team over the years, and when it comes to clue collection and accurate judgment and reasoning, he thinks Gu Chen's reaction is very good.

Talented, maybe it refers to people like Gu Chen, right?

Thinking of these, Xiao Yang couldn't help but think of when he first joined the police force.

is also a probationary police officer, and he is also facing the test of the old bird, and the difficulty of his questions at that time is even not as good as now.

In terms of reasoning time, Gu Chen in front of him was able to solve the problem he had carefully prepared in less than eight minutes.

And the last time I was myself, it took nearly an hour.

Gap... All of a sudden, it was formed.

Xiao Yang didn't understand, how did Gu Chen develop this ability?

How difficult it is to practice this technique? In terms of reasoning technique alone, this is fundamentally different from training at the police academy, and there is a huge gap between theory and reality.

At the beginning, Xiao Yang himself specialized in criminal investigation, and during his time in school, his grades in various subjects were also among the best, and he thought that he could show his skills in the police force.

But in the end, when I came to the police force for apprenticeship, all kinds of theories were piled up, and suddenly became worthless.

No matter how much theory is piled up, it is not as good as the empirical judgment of an old criminal policeman.

Today's police academy students generally use the winter and summer vacations to contact the corresponding police station to exercise their work ability in advance.

But it is even rarer to be able to intern in the criminal investigation team, and it also requires a certain amount of social relations, not to mention Gu Chen's winter and summer vacation internship unit, which is still a little-known non-staple food supermarket.

"Could it be that there are walnuts in the supermarket that have been squeezed by the door?

Xiao Yang's long-standing 5% over the years has regained his doubts.