A Professional Avenger

Lin Yuetian drove to the police station to attend the task force meeting.The system made many comments on this picture, such as "Weasel pays New Year greetings to chicken", Lin Yuetian thinks his Chinese skills are not good.

Chen Chen, the leader of the special case team, has been waiting for him for a long time. Chen Chen is forty years old, and he has worked with the original body many times before, and they are considered friends.He had heard about the messy things that Lin Yuetian had encountered recently, so he came up and patted him on the shoulder first: "It's a good thing to be under pressure, but Xiao Lin, don't be too burdened."

"I'm fine, Captain Chen." Lin Yuetian pulled out the chair and sat down, took out the files and notes, "Captain Chen, let's start now."

Chen Chen nodded, and said to other police colleagues, "Okay, the tenth special meeting on the April [-] blunt weapon serial homicide case officially begins."

He clicked on the computer, showed the PPT on the projector, and reviewed the case at the same time: "The No. 1 victim of the April 4 serial murder case is Zhao Fanyun, who lives alone and works as a freelancer. Running habits, I went out for a morning run around the community at 27:[-] a.m., and then went outside the complex to buy breakfast at [-]:[-] a.m. Later, the victim walked home from this alley in order to take a shortcut. It was [-]:[-] a.m. , he met the murderer, and was hit on the head by the murderer with a blunt instrument until he died. He was later found by sanitation workers at noon. The autopsy judged that the murder weapon should be a claw hammer. We searched in hardware stores across the city, but found no crime In the past three months, a suspicious person bought a claw hammer. There were no footprints, fingerprints, DNA, or hair left at the scene, and the victim lived in a remote place. This alley is usually deserted, and no witnesses were found.”

The PPT switched to the second one.Chen Chen went on to introduce: "Starting from the No.2 victim, the criminals began to commit crimes on rainy nights. The No.2 victim is He Dan, who is in the clothing business, has complicated interpersonal relationships, and has the habit of going fishing in the reservoir. Before the incident happened that day He Dan had a phone conversation with his wife at [-]:[-] p.m., two hours before the incident. He Dan mentioned that it started to rain, so he brought his own raincoat. Home, my wife called the police to find it the next day. It was also a blunt force injury, but this time the murder weapon was a stone near the reservoir... Please see this picture, the murder weapon was found this time, but there is no information. The scene was destroyed due to heavy rain serious."

"The next dead are male and female," Chen Chen quickly introduced. "We have searched the interpersonal relationships of the five deceased, and found no intersection, and no one who might have murderous intentions towards them. The only one The common point is that there are no clues at the scene, and all five people died of blunt weapons, but the injury appraisal of the last three deceased showed that the murder weapon in the last three cases should be a masonry hammer. However, this does not mean that the murderer was a construction site worker or something After all, tools are generally not strictly guarded at construction sites in our city, and the possibility of the murderer stealing cannot be ruled out. Xiao Xie from our team made a profile of the murderer, and I printed it out for everyone to see."

Chen Chen handed out a stack of printing paper.Lin Yuetian took it over to read, and the content is not too much: young and middle-aged males, ages may range from 20 to 45, strong anti-reconnaissance capabilities, may have previous convictions, kill people randomly, have anti-social tendencies, and may be sensitive to rain or blunt objects special affection.

Chen Chen stared at Lin Yuetian who hadn't expressed his opinion all this time: "Detective Lin, do you have any thoughts?"

Lin Yuetian repeated a piece of content in the profile: "The prisoner has a strong sense of anti-reconnaissance. I think he may have a criminal record."

"We've thought about it a long time ago," Chen Chen said helplessly, "We have investigated all the blunt weapon wounding or homicide cases in this city and the three nearby cities in the past two years, but the culprits in all cases have been arrested and are in the police station. They have no ability to commit crimes. Even their close relatives have been investigated, and we have not found any suspects who have committed crimes five times.”

"That's not what I meant," Lin Yuetian explained, "Why do you think the murderer chose rainy days to commit the crime?"

"It's convenient to hide the traces." Chen Chen replied.

"Yes, but there is another problem," Lin Yuetian pointed to the file, "The first victim, Zhao Fanyun, who died in the alley, didn't die in the rain, right? He died in the early morning, when he came out for morning exercises .”

"You can also hide traces in the early morning. There are few people in the early morning, and it is not easy to have witnesses."

"That's right, but the criminal chose to commit the crime in the early morning for the first time, why did he give up this idea and choose a rainy day again?" Lin Yuetian said to himself, "I put myself in my place and thought about it, should I It's because rainy days are more convenient than early mornings, and what's the most convenient thing about rainy days...rain, wash-off—it's blood."

"? Why bloodstains." The system spoke in a tone that couldn't understand you perverts.

"Because some people wear raincoats on rainy days." Lin Yuetian explained to Chen Chen, in fact, explaining to the system, "The most difficult clue in a murder case is the bloodstain, and the most difficult bloodstain is at the scene, but in this It is not a case that happened in my own residence. What is really difficult to deal with is actually the blood on the murderer. How can I leave the scene without blood and not be surprised by the witnesses? The answer is the raincoat. The murderer should have worn a rubber raincoat when committing the crime. After the murder, the rain will wash away the blood on the raincoat, and after the prisoner calmly leaves the scene, the possible witnesses will not pay too much attention to a passerby wearing a raincoat on a heavy rainy day. I think the murderer chose early in the morning because he thought There are few witnesses in the early morning, and there is free time to change the bloody clothes, but in fact changing clothes is very troublesome, sometimes there will be..."

"It doesn't need to be so specific." The system coughed and reminded.

Lin Yuetian also coughed twice: "In short, he probably felt that this method was too troublesome and the risk was too high after committing the crime for the first time, so he chose to commit crimes in rainy days to avoid risks."

He added: "In addition, the murderer's murder weapon was different for several times, although they were all blunt weapons... the first time was a claw hammer, the second time he searched for a stone at the scene, and the third time he used it regularly A mason's hammer. That means he's looking for the best weapon."

Chen Chen nodded, and continued to ask: "That's right, that's right, but is there anything important about it? If you feel that the murder weapon is not convenient, you will naturally choose to change it."

"Yes," Lin Yuetian said, "the first thing is, this shows that the murderer has been perfecting his actions from time to time, perhaps this is the first time he has killed someone."

"Isn't this contradicting what you just said about having a criminal record?" Another person asked suspiciously.

"No contradiction," Lin Yuetian paused, "I mean... the first victim, Zhao Fanyun, is he really the first victim in the murderer's series of crimes?"

"?"

Lin Yuetian said: "Actually, I have been thinking about why the murderer would choose a blunt weapon...Of course, a blunt weapon is much easier to use than a sharp weapon. It takes a lot of skill to kill or injure people, or at least make people lose the ability to call for help or resist..."

"Only an industry elite like you can do it, right?" The system guessed his words.

"You are wise." Lin Yuetian said in his mind with relief.

Of course he would not say this, but continued to analyze: "However, it is undeniable that if my conjecture is true and the murderer has no previous convictions, it would be very strange. Because for a person without a criminal record Say, when thinking of killing people, the first thing that comes to mind is a sharp weapon, right? Fruit knives, screwdrivers and the like—why would a prisoner think of using a blunt weapon?"

"Why?" Chen Chen was fascinated and couldn't help asking.

"I make a bold guess," Lin Yuetian said, "the first victim in this case was someone else, and it is very likely that he died of a sharp weapon injury, or even suffered from excessive blood loss after being stabbed with a sharp weapon multiple times. I guess the prisoner is After using a sharp weapon once, he found that the sharp weapon was not smooth, so he changed to a blunt weapon. That’s why I said he has a criminal record.”

Lin Yuetian said: "So I think we should investigate all unsolved murder cases with sharp weapons in this city within half a year, and investigate them together with this case after research."