Gu Chen just said it casually, but the old lady was startled.

The death of Wan Xin and her family is also a big blow to her, and now her every word may be the direction of the police's suspicion.

However, the old lady is different from others, she is the landlord, and she should also be one of the people who know Wan Xin best.

But remembering what happened before, she gasped a little, squeezed out a smile again, and said, "Comrade policeman, Wan Xin, although she is a single mother, she feels close to many other strange men." ”

"It stands to reason that she has been divorced and has her own freedom, so I shouldn't have asked. ”

But Wan Xin always frequently has close relationships with different strange men, today Zhang San, tomorrow it is Li Si, I can't stand it and will say a few words to the neighbors around me. ”

"But you also know that in our place, it is a habit for the elderly to be poor, and it doesn't take long for everyone to know what they usually chat. ”

"Wan Xin and I quarreled with me for this reason, so there is a gap between everyone, except for the few days when I collect rent, I usually don't want to deal with her at all. ”

"This is what you call offended?" Gu Chen said.

Although I didn't know much about the old lady, she didn't look like she was lying, so she smiled and said, "So apart from you, has she offended anyone else?"

The old lady finally felt a little more comfortable: "Well, I don't know." ”

Taking a deep breath, the old lady knew what Gu Chen wanted to know, so she first said, "What you said is not clear, but I once saw Wan Xin in a small alley once quarreling with a man. ”

Gu Chen asked suspiciously, "Do you know that man?"

"I don't know about this, and I didn't see the face, when the man had his back to me, I could only recognize Wan Xin. The old lady was getting impatient.

Gu Chen was even more impatient.

If the old lady could provide some clear clues, she would not spend too much time on her side.

Considering that the old lady may have a lack of memory and is easy to forget, Gu Chen said seriously: "Think about it carefully, the person who has his back to you, judging from the figure, could it be an acquaintance in Dahe Town?"

"Wan Xin's work and life are only limited to Dahe Town, and the people she interacts with are also in Dahe Town, and you have always lived in Dahe Town. ”

"For so many years, judging a person from their back may not be a problem for you, right?"

Lu Weiwei heard what Gu Chen meant, and couldn't help asking: "Old lady, you know everyone here, can you protect anyone." ”

"Look at what you said, how could I protect anyone?" also heard Lu Weiwei say this, the landlord was originally a little panicked, but now he has a headache even more.

She said a little unhappily: "Comrade policeman, you let me think about it again, if I remember it best, don't blame me if I can't remember, after all, I'm old, and sometimes I'm really forgetful." ”

The old lady's tone was helpless, more like a complaint.

The old landlady did feel that the back of the man at that time seemed to have been seen somewhere, but the old landlady did not pay too much attention to it at that time.

I feel that I should really buy some elderly milk powder to replenish my brain, maybe that will increase my memory.

It was also after learning this information that Gu Chen recorded it, and then returned to Director Gao and Zhang He to search around the Big Windmill Hotel.

There are several issues before us.

First, how were these three people killed in no apparent way?

The three able-bodied people didn't resist at all? They didn't even shout loudly, so how many murderers were there?

Second, the murderer had been to the small room and opened it, and he must have found two children sleeping in the room.

But why, even Wan Xin's son and his son's friends were killed indiscriminately, which shows that the murderer had already killed the red eyes at that time.

Judging by this situation, the murderer would not let go of the two children in the room at all.

In addition, the red blanket on Wan Xin's body must have been covered by the murderer.

But since you want to kill Wan Xin, why do you want to put a blanket on Wan Xin's body?

From this point of view, it seems that an acquaintance committed a crime, but the other party can't seem to let go of the children in the room, which shows that the murderer has a conflict in his heart.

Gu Chen could only temporarily define the murderer as a psychological problem, or Wan Xin's youngest daughter happened to be home at that time, which disrupted the murderer's deployment.

So the murderer gave up killing the two little boys in the room and kidnapped Wan Xin's little girl instead.

And the third, Wan Xin's youngest daughter, whose whereabouts are still unknown, was obviously kidnapped, but why, the murderer did not directly kill Wan Xin's daughter, but directly kidnapped her?

Gu Chen has never figured out these three questions.

Especially in the living room, Wan Xin and the two children not only had knife wounds on their bodies, but also blunt weapons, and the murderer was too vicious, feeling like a deep hatred.

But listening to the old lady of the landlady, it seems that Wan Xin is in Dahe Town and has relationships with many strange men.

He even got into an argument with a strange man in the alley.

In this way, the man in the alley seems to be suspected of committing a major crime.

"Gu Chen, look at it. While Gu Chen was thinking, Lu Weiwei found a rusty kitchen knife in a trash can outside the tourist distribution center of the Big Windmill Resort Hotel, with obvious blood stains on the kitchen knife.

A group of police officers immediately surrounded them, and Gu Chen was among them.

"Is it a murder weapon?" asked trainee police officer Zhang He.

Gu Chen didn't respond directly, but took it in his hand to check the left and right for identification, and then said: "When I was doing an autopsy just now, I did find that some of the wounds of the corpse were rusty. ”

"And judging by the extent of the wound, it should have been cut with a kitchen knife. Glancing at the kitchen knife in his hand, Gu Chen nodded slightly: "This should indeed be one of the murder weapons." ”

"I have found something here, too. At the same time that everyone was discussing around the garbage can, Officer Wang also found a bloody hammer in the garbage can in another location, and the whole person couldn't help but say: "This should be a blunt object smashed on the heads of the three people." ”

"Is there blood?" asked Lu Weiwei.

Officer Wang nodded, took the hammer directly to the crowd and said, "Do you need to say it? ”

"Put it away first, Senior Brother Wang, and I'll take it to Forensic Doctor Liu for identification later, and see if it is in line. Gu Chen now has too many doubts in his heart.

The killer left him with too much unknown.

Gu Chen didn't know what kind of psychological character he was facing, and he didn't seem to be able to figure it out at all.

After putting the hammer and rusty kitchen knife suspected of being the murder weapon into the evidence bag, plus the folding knife that was previously found at the scene of the crime.

At this moment, there are as many as three murder weapons found alone?

This makes everyone feel that the murderer is not a person at all.

The police lights flashed outside the courtyard, and Forensic Doctor Liu and his team rushed to the scene of the crime.

Seeing Gu Chen, Lu Weiwei and Officer Wang, Forensic Doctor Liu was the first to walk up to Gu Chen and asked him, "How is the situation at the scene?"

"Three murder weapons were found, namely a hammer, a kitchen knife and a folding knife, and the deceased was killed by these murder weapons. ”

"How can this be?" Forensic Doctor Liu frowned, looked at Gao Chuanfeng, the forensic assistant beside him, and suddenly said: "You go and take a look first, if there is no problem, put it in a body bag, and check it later in the technical department." ”

"Yes. Takakawa Kaede answered and left.

Gu Chen took the initiative to hand over the other murder weapons to Forensic Doctor Liu and said, "Forensic Doctor Liu, it is not easy to judge whether these murder weapons are real tools for committing crimes. ”

"Although they all have blood stains, it is difficult to judge whether it is blood stains on the deceased's body, and whether there will be fingerprints on them, all of which need the support of the technical department. ”

"Well said. Forensic Doctor Liu looked left and right, and followed everyone all the way to the hall of the No. 9 windmill room.

At this time, he also noticed that there were some blood stains on the doorknob of the small room, and he turned his head to look at Gu Chen.

Gu Chen shook his head: "I have checked, the bloodstains are indeed left by the murderer, but no bloodstained fingerprints were found, the murderer seems to be wearing gloves." ”

Forensic Doctor Liu looked at Gu Chen with a wry smile and said, "It's quite a headache to deal with these cunning murderers, right?"

"Isn't it?" Lu Weiwei was the first to stand up and complain, saying: "There are too many suspicious points on the scene, and we have collected some of them, but it is difficult to connect them. ”

"Even Senior Brother Gu has no definite clues so far, it seems that this murderer is indeed difficult to deal with, and the murderer also kidnapped a little girl. ”

"Rest assured. Seeing that everyone didn't gain much at the scene of the crime, Forensic Doctor Liu saw that his assistant Gao Chuanfeng had already put the body into a body bag, and said: "The corpse can speak, I will test it later in the technical department to see what the specific situation is." ”

"I'll go with you. Gu Chen took the initiative to ask.

Forensic Doctor Liu agreed: "Okay, then Gu Chen will go with me." ”

Back at the technical section of the city bureau, it was already a few hours later.

At this moment, in the testing room of the Technical Department of the Municipal Bureau, Gu Chen is the same as Forensic Doctor Liu and Forensic Assistant Gao Chuanfeng.

Wearing a special uniform, he carefully examined Wan Xin's body.

The light platform here can infinitely magnify many subtle wounds, and after cooperating with Forensic Doctor Liu's examination, Gu Chen found that in addition to folding knife wounds, rusty kitchen knife wounds and blunt force wounds, there are also a fourth different murder weapon.

After repeated tests on the corpse, Gu Chen took the lead in surmising: "Forensic Doctor Liu, it seems that the murderer used a qi dog. ”

"You mean...... Air rifle?" Forensic Doctor Liu didn't speak, but it was Forensic Assistant Gao Chuanfeng who took the lead.

Forensic Doctor Liu was silent for a moment before finally agreeing with Gu Chen's statement: "That's right, this kind of trauma can only be caused by a qi dog. ”

"I see. Gu Chen suddenly realized, and said with a long breath: "Perhaps, this can explain why the victim did not dare to resist and let him commit violence, because the other party had a gas dog in his hand." ”

Forensic Doctor Liu narrowed his eyes and said a little nervously: "This kind of thing is forbidden to be used in our country, but there are still many people who can assemble it themselves, Gu Chen." ”

Glancing at Gu Chen, Forensic Doctor Liu suddenly reminded: "Maybe this is the key to your case." ”

"That's what I thought, too. "Considering that Wan Xin doesn't have many contacts in Dahe Town, maybe there won't be many people who can really control the qi dog, so this narrows down the search area a lot.

"Forensic Doctor Liu. Gu Chen looked at the test report that had not yet been filled in, and continued: "Please write the test report completely, send it directly to my WeChat, and I will go back to the Furong branch first and discuss these clues with my colleagues." ”

"Yes. Forensic Doctor Liu didn't mean to keep Gu Chen.

After a few simple chats between the two in the testing room, Gu Chen quickly left.

......

......

Furong Branch, Office of Criminal Investigation Group 3.

Gu Chen wrote the doubts he was considering on the whiteboard with an oil-based pen on the writing board, and then listed the murder weapons one by one.

When she saw the "Qi Dog", Lu Weiwei frowned slightly, and asked Gu Chen: "Senior Brother Gu, why did the murderer use so many murder weapons to kill?"

After Gu Chen finished writing the last period, he turned around and said, "Cover up." ”

"Cover up?" Officer Wang frowned and said, "You mean that the murderer is covering up his use of air dogs, so he uses all kinds of murder weapons to carry out all kinds of destruction on the victim?"

Gu Chen nodded, walked up to Officer Wang and said, "That's pretty much what it means, because there are people who have qi dogs, or understand qi dogs, and there are very few people who can assemble qi dogs by themselves, as long as we investigate patiently, we can find out." ”

So the murderer also knew this, so he not only used a folding knife to hurt people, but also used rusty kitchen knives, hammers and other tools, in order to cover up the real murder weapon he used. ”

And this can also explain why Wan Xin and the other two children were easily killed by the murderer with almost no room for resistance. ”

"That's right. Lu Weiwei slapped the table and shook the potato chips on the table a few millimeters away: "Why didn't I think of it before? If the murderer is not perverted, then why did he use so many tools to commit crimes?"

"But now I know that he is covering up, covering up his crime, for fear that our police will find out. ”

Gu Chen didn't answer, but walked back to the whiteboard, and continued to pick up the oil-based pen to write keywords such as "acquaintance" and "angry dog".

In the end, Gu Chen wrote Xiao Gang's name below the acquaintance, which made Lu Weiwei and Officer Wang look at each other, as if everyone wanted to go together.

"Gu Chen. Lu Weiwei turned her head to look at him and said, "Do you also think there is something wrong with that Xiaogang?"

"Hmm!" Gu Chen nodded, looked at her and said, "Have you ever wondered why Xiao Gang and Wan Qiang were okay last night? Do you think the murderer would let them go so easily?"

Officer Wang drank wolfberry tea and said thoughtfully: "If I were a murderer, I would definitely not." ”

"Neither will I. Lu Weiwei also said.

"However, the murderer once tried to open this door, but for some reason he gave up, which saved the two boys Xin, have you ever thought about it? Is it really because Wan Xin's youngest daughter came back? Or is it the murderer's conscience discovered?"

Lu Weiwei and Officer Wang looked at each other, and suddenly fell silent.

Seeing that everyone was silent, Gu Chen said again: "Then I can tell you now, my speculation is unlikely, and I suspect that Xiao Gang had already discovered the murderer at that time, but for some reason, he suddenly shut up and pretended to be stupid." ”

Because judging from my attitude towards asking him about the situation, Xiao Gang seemed to want to express something, but because there was some fear in his heart, he was silent again. ”

And I also speculated that the murderer also seemed to have discovered that Xiao Gang had seen him, but because he knew Xiao Gang, he gave up the murder. ”

It is equivalent to saying that Wan Qiang was able to survive because Xiao Gang was in the house at the time, so he was able to escape the catastrophe. ”

"And the murderer has a qi dog, he can do it alone, and complete the one-hit kill without any resistance from Wan Xin and the two children. ”

There was a brief silence for a few seconds.

Yuan Shasha, who had never understood the situation very well, suddenly asked weakly with the mentality of a bystander: "Senior Brother Gu, according to your speculation, the murderer must be Xiao Gang's acquaintance, and the reason why he didn't enter the room was because he was afraid that Xiao Gang would shout loudly and expose himself." ”

"And Xiao Gang also pretended to be stupid after seeing the other party's face clearly, so that he could escape the catastrophe, but ......"

Thinking of this, Yuan Shasha was a little puzzled: "But Xiao Gang is only a six or seven-year-old child, how can he have such a big city?"

"Of course he doesn't have such a big city, but his parents do. Gu Chen said something that broke the sky, and said: "I was at the scene at the time, and I noticed the change in the expressions of Xiaogang's parents. ”

When Su Jing saw me, her legs couldn't help but tremble, she said that she was afraid of being nervous, maybe it was true. ”

But her husband, every time Xiao Gang was about to give clues that might help the case, his father kept reminding him that if he exposed himself, he was likely to be in danger. ”

And Xiao Gang also changed his words every time he listened to his father's prompts, saying that he had seen the murderer before, and then saying that he was having nightmares, and all kinds of answers were incoherent and inconsistent. ”

"Children don't have so many eyes, but when I talked to Xiao Gang, I found that he was cautious like an adult, and seemed to be afraid of something. ”

"Senior Brother Gu. Lu Weiwei couldn't help but be surprised, and asked him weakly: "Do you really think there is a problem with this Xiaogang?"

"There's definitely a problem!" Gu Chen confirmed very much: "I put my hands on his shoulders, and he didn't even dare to look at me. ”

"That's right. Lu Weiwei suddenly realized that she also remembered the situation at that time.

Under normal circumstances, Gu Chen's sharp eyes have always been able to make criminals dare not look directly, which has been verified during the interrogation of many suspects.

But a six or seven-year-old boy was actually afraid of Gu Chen.

You must know that Gu Chen is a policeman, and he and Xiao Gang are in a horizontal position when questioning, and it stands to reason that Xiao Gang should have a sense of security.

But at that time, Xiao Gang had been dodging, and his eyes and other criminals who confessed their guilt were almost a habit.

That is the weakness of the heart.

Lying and being weak-hearted, this is the reason why Xiao Gang deliberately avoided Gu Chen.

......