National Forensic Doctor

"If the murderer is one person, then our previous investigation direction was completely wrong."

The annoyance in Lei Xin's heart disappeared in a flash. He is also a veteran detective and knows that making mistakes is normal.

Most investigations are done through trial and error. Who can say that a case can be solved 100% of the time. The level of forensic doctor Niudong in Qianjin District is also very good. His performance in past murder cases is also remarkable. Especially when it comes to the identification of various paper items, Niudong is a master. Many provinces and cities have Technical investigators would even come all the way here just to let Niudong do a paper inspection with his own hands.

A knife caused three kinds of wounds. Only a forensic expert like Jiang Yuan dared to look at the photos and make such a conclusion.

Lei Xin quickly put aside the issue of accountability and turned around and said: "In this case, the murderer's motive is probably not to make money."

"It is inconvenient for a single person to carry a machete if it is for burglary." Liu Jinghui followed up with analysis: "If there are three people, it is normal for one of them to carry a long-handled weapon. How much does it cost for a single person to carry a long-handled weapon?" There is no need to bring a heavy machete, and even if you have to bring one, you should bring one of better quality.”

Liu Jinghui said a little casually, chatting: "The weight of a machete is at least about the same as the weight of a woman's bag. If it is a burglary to make money, bringing such a machete is very cost-effective. .”

"What about self-defense?" Wang Chuanxing asked, more for the sake of flattery.

Liu Jinghui followed the words and said: "It is enough to carry a knife for self-defense. Nowadays, most people will not fight you when they see you holding a knife. Moreover, his knife is too bad. After a few cuts, it curls up. After a few more cuts, it was broken. It was obviously not prepared for killing people. It was more like buying a random knife outside."

"Committing a random crime?" Lei Xin straightened up and frowned tightly.

If this was a random crime, it would be like climbing from a muddy road to a snowy road. It is not an easy road.

"At least it's not for burglary." Liu Jinghui's thinking was very clear, and he said: "If you expect that such a machete will be used in the burglary, the best way is not to go!"

There was no need to explain this, Lei Xin nodded in agreement.

Burglary is for the purpose of stealing, not for robbery.

The victim's family is not a luxurious family, but an ordinary middle-class family. The total value of the property that the murderer took away after rummaging through boxes and cabinets was only tens of thousands of yuan. A family of this level can be achieved by any family in the same community. , therefore, if it is for the purpose of making money and if there is a possibility of fierce conflict, changing to another company is the most correct choice.

In other words, making some preparations in advance, finding a time when the household is not around, or breaking in when only the hostess is home, can greatly reduce the risk of violence during burglary. This murderer obviously went to a social university and didn't know this bit of common sense.

Of course, there are also some burglary offenders who are stubborn, that is, they will randomly choose a house to break into, steal if they can, and rob if they can't. But this kind of people are usually shot to death. It would be a very accidental encounter with such a person...

"So, if the murderer is a single person, it is not for making money, but for killing others?" Lei Xin followed Liu Jinghui's reasoning and asked one more question.

Liu Jinghui said "En" and said again: "The possibility of plotting someone is relatively high."

"We can check the surveillance again. Before, we mainly considered the situation of three people. However, we also considered the situation of three people walking separately." Lei Xinbai gave a sentence, then clicked, opened the lighter, and gave it to Everyone lights cigarettes.

Jiang Yuan looked around and saw that the others had no intention of speaking, so he said, "I can watch the surveillance, but the information is a little lacking. Is there anything from the technical investigation?"

"Not yet."

"The criminal was very careful. He left no fingerprints or DNA. If there were footprints, he wore foot gloves, and the subsequent traces were basically destroyed. The family stocked up on too much salt and detergent." Jiang Yuan sighed with emotion.

"An active participant in Double 11." Lei Xin replied, and added: "We have also considered the situation of couriers and the like, but have not found any yet."

Because he remembered the case in Malaysia, he checked a group of couriers.

At this time, Liu Jinghui closed the file with a "snap" and said: "It's difficult to check the person. I suggest checking the murder weapon. The quality of this knife is so poor, it doesn't look like it was bought in advance and used to commit crimes. Look at the situation of this family , there should be no demand for buying machetes online. Moreover, the thick-backed machete has been sharpened again, so it is considered a controlled knife. I think the probability of buying it offline is relatively high, and it is very likely that the murderer bought it from the surrounding area."

This speculation is a little bold, but Lei Xin has no objection. For him, the more clues for investigation, the better. If you can't find this clue, you can just check other ones.

Lei Xin asked someone to pull out the map and said: "If it's definitely a machete, there won't be many places where you can buy it. The hardware stores and decoration markets here should all sell them, as well as this kind of hotel supplies and There are wholesale markets for camping equipment, as well as farmers markets, some vegetable markets also sell them, and there are also livestock markets and dog markets here..."

It's not much, but in detail, there are seven or eight kinds of them.

Lei Xin called a few acquaintances from nearby police stations, and finally listed more than 40 locations. The small one was a hardware store or decoration store, and the large one was a building materials wholesale market, which was as large as a school. University.

Lei Xin knocked it out and said: "Okay, these are the places. Captain Jiang, do you want to rest or..."

"I'll go to the livestock market and the dog market. I'll take the people from the backlog team there." Jiang Yuan was also willing to take a stroll.

The livestock market and dog market in Qinghe City are adjacent to each other. The livestock market is a market that sells large animals, including cattle, horses, sheep, pigs, etc., as well as young animals, and various related supporting products, such as ropes for tying cattle, soybean meal for feeding cattle, rakes for tying cattle, and slaughterhouses. The bull's sword has gradually declined, giving way to the dog market.

The dog market not only sells dogs, but also various other small animals, but there are relatively few poultry, and now it mainly sells pets.

Jiang Yuan's special case backlog team has more than 20 people, which is enough to search a market, or even slightly exceeded.

Lei Xin naturally had no objection and agreed immediately, and then assigned other addresses to other police officers from the criminal police team. The group of people then got into their own Jetta, Overbearing and Audi respectively.

Liu Jinghui followed Jiang Yuan onto A6 and said with a smile, "You don't usually go out on the field. What are you thinking about today?"

"I also guessed the thick-backed machete. I'm not entirely sure what weapon the murderer used. Go to the scene and have a look to be more sure. Maybe you can see some strange weapons." Jiang Yuan paused. , and then said: "This murderer has a strong sense of counter-reconnaissance, and he has quite an idea of ​​salting the corpse, so we should pay more attention to it."

"Well, it seems that there are indeed a lot of things to pay attention to in this case." Liu Jinghui paused and said, "If the murderer is not an acquaintance, his motives are very questionable."

"how to say?"

"Didn't Brigade Lei ask in the conference room just now whether the crime was committed randomly? I didn't answer directly, but was it committed randomly? In fact, it is possible, but if you understand it in terms of making money, this case is random or not. It's random and can't be explained, but what if the purpose is to kill someone? For example... break into a house, rape, and kill someone?"

Jiang Yuan frowned.

"Judging from the photos of the victim's family, the victim's mother and daughter are relatively beautiful. Of course, the daughter is still relatively young, only 11 years old, but this kind of cowardice cannot be measured by common sense." Liu Jinghui said simply After a few sentences, he added: "This is just my guess. There were a lot of people just now, so I didn't tell you..."

"Actually, it makes sense." Jiang Yuan suddenly expressed support, causing Liu Jinghui to stop involuntarily.

"How?" Liu Jinghui asked.

"One of the reasons why I mentioned the thick-backed machete is that on the heads of the two female victims, there were traces of suspected slashing with the back of the knife. There were both slashing marks on the back of the knife and traces of the curled blade, but this requires obtaining You can only be sure if you have the murder weapon. But in any case, when the murderer chopped the two women, at least at the beginning, he may have had the idea of ​​​​stunning them unconscious rather than directly killing them."

"If that's the case, that's pretty much it." Liu Jinghui sighed and said, "If it's just to kill someone, just kill him... In this case, you can also analyze the murderer based on his motives."

Using salt to pickle corpses, I thought that many people have salt hoards. If the corpses are to be discovered later and don't stink too much, salting them should be convenient and effective. I also want to make fun of the salt hoarders. After I finished writing this story, I searched it in the search engine. I didn’t expect that there are so many perverts in the world... The last few cases are basically what I thought about in my life. Sometimes it’s hard to solve the case, just like being a police officer. I chatted with my friends and got only vague answers. It can only be said that when an author writes a book of more than 2 million words, he will really learn something.