As soon as Shen Yan returned to the police station, he was called to the office by the director.

As soon as Wang Ju saw Shen Yan enter the door, he opened his mouth and asked, "That guy committed a crime again?" ”

Shen Yan nodded: "The victim died on the spot." ”

Hearing this answer, Wang Ju frowned again. The murderer has committed five crimes in a period of more than half a month, and the ferocity of his methods and the frequency of his crimes are outrageous.

"Has anyone seen the murderer?"

Shen Yan shook his head: "The murderer is still picking an old community without security, we asked around the neighborhood, only one old man remembered seeing a strange man at the time of the crime, but he only remembered that the man was of medium stature, wearing a down jacket and a hat, and did not give more useful clues." ”

"How have you come so far?"

"Combined with the accounts of eyewitnesses in previous cases, we can now basically determine that the killer was a man of medium build, probably between 30 and 40 years old. He acted very carefully, picking out areas where there were no old neighborhoods or no people, and after the attack, he took things and ran, and the crime was committed for a short time. Several cases occurred in the eastern district of the city, and judging from this point, the murderer should have lived or worked in the eastern district of the city. We are currently working to identify eligible suspects in the eastern part of the city. The biggest difficulty now is that we can't ask for the victim's testimony and can't get first-hand information about the murderer. But don't worry, Director, we will definitely go all out to solve the case as soon as possible. ”

Wang Ju nodded: "Shen Yan, you also know that now the whole society is very concerned about this case, and if the murderer is not caught for a day, we will not be able to stop it." A lot of people have told me that they don't dare to go out alone now. Seeing that the year is coming, we can't let the people even have a bad Spring Festival. The mayor also called today to inquire about the progress of the case. You have to do everything you can to catch this murderer as soon as possible! ”

"Yes!" Shen Yan replied immediately, with a resolute seriousness on his face.

Shen Yan returned to the office, and several people in the room immediately came over. Fang Liyuan asked with concern, "What did the director say?" ”

"It's just to ask about the situation, let's hurry up and solve the case as soon as possible." Shen Yan replied simply.

Fang Liyuan didn't say anything more, in fact, he didn't need to ask to know that it was absolutely impossible for the director to say such a few words. During this period of time, the bureau has held many special meetings on this case, and the propaganda side has received calls from various media to inquire about the progress of the case almost every day. All eyes are on this. For this case, the lights in the office of the Serious Crime Team have not been turned off in the past ten days, and everyone is working hard, but there are more than 6 million permanent residents in S City, and in the vast sea of people, how easy is it to find a person who is not even clear about his specific physical characteristics? And the most odious thing is that under such circumstances, the murderer is still committing crimes, which is simply a contempt and provocation for the city's police. The thought of this burned everyone's anger to the top of their heads.

"Damn, when I catch this bastard, I'm going to have to beat him up, scumbag." Qin Kai pinched his bones and said hatefully.

"It's not enough to beat him, I want to kill him alive." Cheng Haiyang gritted his teeth.

"When he is caught, someone will naturally clean him up." Shen Yan patted his team members, "Okay, let's stop thinking about that, let's think about the case in front of us." He leaned over to the table and said to a few people, "Come, let's sort out the information we got before and see if there are any new discoveries." ”

A few people nodded, so everyone sorted out the case from the beginning again.

"In chronological order," Qin Kai looked at the folder and began to narrate one by one: "The first case occurred on the 22nd of last month, the victim was Qian Fengqing, a 52-year-old retired aunt, the time was around 6:30 in the morning, and the location of the attack was in the courtyard of the Four Seasons Community in Chengdong District; The second case was on December 25, the victim was Feng Li, a 30-year-old company employee, at 9 a.m., in the corridor of the Lotus Community next to Carrefour in the east of the city; The third case was on December 28, the victim was Zhao Guangjian, a 42-year-old owner of a building materials factory, at about 9:40 p.m., in a small alley near the building materials factory; The fourth case was on December 31, the victim was Li Xuejuan, a 38-year-old factory worker, at about 10:10 a.m., in Jinyuan Community, Chengdong District, but because someone passed by, the murderer fled, and Li Xuejuan did not die; The last one was today, January 5, and the deceased was 43-year-old Wang Guangwei, a freelancer, at around 9:25 a.m. in the Dongjiang community. All of them were hit in the head with a hammer, the most 3-4 times, the least twice. Regarding the murderer, there are currently three eyewitnesses, and their statements are more consistent that the murderer is of medium height, about 30 years old, dressed in a low-key manner, wearing a hat everywhere he goes, and his face cannot be seen clearly. ”

Shen Yan nodded: "The murderer is very cautious, and our current information about him is very limited, so we need to analyze it from his behavior." Let's talk about it. ”

"Generally speaking," Fang Liyuan was the first to analyze, "most of those who commit murder in the form of 'planing' want to take revenge on society. They are generally hit hard in their lives and begin to hate society as a whole. The target of the murderer's murder is not fixed, and it is very random. In this case, most of the murderer's targets are women, which shows that the murderer's hatred for women is relatively large, and it is likely that the blow he received is related to women. Or maybe he is in average physical condition and is worried that he will be violently resisted, so he chooses a woman as the target of the attack. ”

Cheng Haiyang looked at Fang Liyuan and said, "You say, the murderer hates women so much, could it be because he was dumped by his girlfriend or wife?" ”

"Not really," Shen Yan shook his head. "The women the first to be attacked by the murderer were all around 40 years old, and the earliest one was in their 50s, and the murderer was probably less than 40 years old, so it was impossible to be a girlfriend, and it was more likely that a female colleague or boss at work was more likely."

"Judging from the time of the murder," Jiang Li said this time, "most of them are concentrated in the morning, indicating that the murderer is either out of work or working late or irregular, and may be a temporary worker or a night shift worker in the factory." ”

Shen Yan nodded.

"We studied the location last time," Cheng Haiyang said, "The murderer's scope of murder is concentrated in the eastern district of the city, which shows that the murderer is familiar with this district and knows where and when it is more secluded, so it is convenient to start." He probably lives or works in this area. And then there's ......"

"Then there are tools," a voice suddenly sounded from the door, and everyone turned around at the same time, only to see Cheng Jinsong walking into the house.

"Eh, Brother Jin!" Several people greeted Cheng Jinsong. Looking at the few pieces of paper in his hand, Cheng Haiyang asked expectantly, "How is it?" Did you find something? ”

"It's a little bit of a discovery, but it's not very directive." Cheng Jinsong said, handing a few pieces of paper in his hand to Shen Yan. Several other people immediately came to Shen Yan's side and looked at the pieces of paper together.

"We have just reconstructed the head wound of the fifth deceased, Wang Guangwei, and after comparison, the murder weapon used by this murderer is different from the previous times." Cheng Jinsong looked at the frowning looks of those people, and continued, "So far, the murderer has used a total of 4 different types of hammers, one for the first two, one for each of the last three, and the parts smashed are not exactly the same, I suspect that the murderer is ......."

"He's constantly experimenting and improving the technology." Shen Yan continued.

"Yes." Cheng Jinsong nodded in agreement.

Hearing this, the brows of several other people furrowed even deeper. The murderer has such a move, which means that he will continue to kill people in the future......

Shen Yan also knew the seriousness of the problem. In this case, they must solve it quickly, otherwise the number of dead and injured will increase. However, they really lack effective clues at present, and everyone has been talking for a long time just now, but there are no new discoveries, so Shen Yan decided to change his thinking.

"In this way, let's talk about what you think is suspicious, or the next angle of investigation."

"I think the investigation should continue," Fang Liyuan said first, "Although this method is a bit of a needle in a haystack, we have too few clues now, and any method that can help narrow down the scope is worth trying." ”

Shen Yan nodded.

"The stolen goods must be a line," Jiang Li said, "We currently know that the victim's stolen items include mobile phones, wallets, and flashlights and other bits and pieces, although we have not found the stolen goods sold so far, but the murderer will always find a way to deal with these things." ”

"Also, the hammer can be checked again." Qin Kai then spoke, "If the murderer keeps changing the hammer because he wants to find the best one to use, then he should buy a new hammer or transform the original one, we can go to the place where the hammer is sold and have a more look." ”

"Actually, there is something I don't understand," Cheng Haiyang frowned and said, "Why did the murderer kill Zhao Guangjian?" All the other victims were women, only Zhao Guangjian was a man, could it be that the murderer had a grudge against Zhao Guangjian, so he deliberately killed him? ”

Several other people listened to Cheng Haiyang's analysis and also fell into deep thought.

Cheng Jinsong has been listening to everyone's speeches, and his gaze has changed with the speaker. At this moment, everyone was silent, and he looked back at Shen Yan. Only then did he notice that Shen Yan's hand had been holding his stomach against him - this person must have had another stomach pain......

Probably feeling Cheng Jinsong's gaze, Shen Yan rolled his eyes: "What's wrong?" Any suggestions? ”

Cheng Jinsong was stunned, and then he noticed that he had just lost his mind. He moved his body and coughed lightly to speak: "Regarding the hammer, I think that the murderer may not necessarily go to someone to reform, and now that the wind in the city is so tight, it is easy to attract the attention of others at this time, whether it is to buy a hammer or find someone to reform, so I suspect that the murderer may do it himself." I think you can pay more attention to the sale of remodelling tools, files and pliers should be considered. ”

Shen Yan nodded in agreement: "Okay, then we will continue to investigate according to this line of thought." Liyuan, you are still responsible for the investigation of suspicious characters, mobilize the police in the eastern part of the city, and narrow down the scope as soon as possible; Jiang Li, you are still in charge of the line of stolen goods, all kinds of mobile phone markets and mobile phone recycling booths must be investigated, so that every person or outlet who recycles second-hand mobile phones knows that we are looking for these mobile phones; Qin Kai, you are in charge of hardware tools, you and the forensic forensic doctor should confirm the tools that may be used, and then go to the place where these tools are sold and ask carefully again; Haiyang, you contact Zhao Guangjian's family, and make an appointment for us to talk to them again to see if we can find any clues. Stay in touch and report any news immediately! ”

"Yes!"

Everyone received the task and immediately went their separate ways. Qin Kai ran over to Cheng Jinsong: "Brother Jin, can you give me a list of tools that need to be investigated?" The more detailed, the better. ”

"Oh, you go upstairs to find Jiayu for this matter, he has been doing the simulation and analysis of the murder weapon before." Cheng Jinsong replied. Qin Kai nodded, turned around and went upstairs to find Li Jiayu.

The big office was empty all at once. Cheng Jinsong walked to the door of Shen Yan's office, knocked on the door and walked in.

Shen Yanzheng was sitting there reading the documents, and when he heard the voice, he raised his head, saw that it was Cheng Jinsong, and asked, "What's wrong?" What else? ”

Cheng Jinsong pointed to Shen Yan's left hand that was still on his stomach and said, "Look at you have been holding your stomach, is your stomach hurting again?" ”

Shen Yan was stunned, quickly put down the hand covering his stomach, and said with a smile: "I forgot about it for a while, it's okay." ”

"No matter how busy you are, you have to eat on time," Cheng Jinsong said, "Your stomach is already bad, and if you go on like this, you will have stomach problems." ”

"It's not that serious, I just forgot to eat at noon. I'll have dinner later

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