Chen Yang rolled the mouse, enlarged the first photo and said: "This deceased is the first deceased we found, the identity information is unknown, we did not find her relevant information in the fingerprint comparison and DNA database, the time of death is about 5 days, the age is about 25 or 6 years old, according to the results of the forensic examination, the cause of death is suffocation, a very thick strangulation mark was found on the neck of the deceased, and the lower jaw has a slight dislocation, which is in line with the characteristics of suffocation." ”

Everyone nodded, and You Jia asked: "Looking at the marks on the neck of the deceased, the strangulation marks on the left side are obviously deeper and longer than those on the right side, you should be able to guess that the murderer is a left-hander." ”

"That's right, judging from the state of the medical examiner's body just now, the murderer is indeed very likely to be a left-hander, but it can't be ruled out that the murderer deliberately did this in order to confuse Jing Fang." Himeko-more continued.

You Jia continued: "Yoko, what kind of strangulation marks on the neck of the deceased you just mentioned are similar to? ”

"Belt!" Chen Yang replied: "But what kind of it is, this point requires us to analyze the width and fiber of all the belts on the market to compare, because the forensic doctor found some pitch-black substances on the neck of the deceased, and after preliminary analysis, it belongs to the belt worn by us ordinary people." ”

The people recorded these two characteristics in the book: "Belt, left-handed." ”

"Nowadays, people basically use the right hand more, except for some nature to use the left hand, most people are not used to using the left hand to do things, such as students are doing homework, or using pens and other work, many people use the right hand more. There are not many people who use their left hand in Chengnan City, so we can check the direction of this. Lian Yinglan sat on a chair and said.

Lian Yinglan continued: "But it can't be ruled out that the murderer is trying to confuse Jing Fang, this possibility is rare, after all, muscle memory will always involuntarily affect people's actions. ”

"Next, let's take a look at the No. 2 deceased," Chen Yang quickly clicked the mouse, "The No. 2 deceased is a male, the same age as the first deceased, 173 cm tall, weighs about 70 kg, there is no sign of being beaten, there is a stitch mark up to 8 cm long on his kidney, it is worth mentioning that Brother Ming was in the process of autopsiing the deceased, the No. 2 deceased was missing a kidney. ”

You Jia held it down with one hand, resting his elbow on the table and thinking, Chen Yang took advantage of everyone's note-taking efforts, he continued: "The No. 3 deceased, the height is about 167, the forensic doctor mentioned in the mouth and nose of the deceased and the stomach similar to the poisonous rat strong ingredients, that is to say, the No. 3 deceased and the No. 4 deceased were also poisoned to death, it can be seen from the body surface of the two deceased that they should have been beaten before their deaths, the No. 4 deceased has a fracture at the ankle, the two deceased are different from the previous two deceased, Deceased No. 3 was a long-term wheelchair user and Deceased No. 4 was blind, which means that both deceased persons were disabled. ”

"It turned out to be poisoning, does it prove that the murderer still has a certain basis for chemical knowledge?" Du Mingyuan asked curiously.

You Jia shook his head and said, "Not necessarily, you can buy some things like rat poison on the market, these things are very common, so not necessarily..."

Du Mingyuan frowned and looked at You Jia, and said, "Boss, do you mean that the deceased was tricked into taking rat poison to death?" ”

"It's very likely, but I took a look at the blackened part, this kind of poisonous rat is easy to cause secondary pollution of the environment, as well as the secondary poisoning of humans and animals, my country has banned the sale of many years ago, the poisonous rat is a strong medicine, and it is extremely polluting. Mice eat mice will die, cats eat mice will also be poisoned, if the cat is buried in the farm, grow something, people are very likely to die after eating, so a long time ago our country attached great importance to this kind of medicine. You Jia explained slowly.

Chen Yang enlarged the photo of the No. 3 deceased and said: "The deceased's right hand has been misaligned from top to bottom. ”

"Was it smashed by something that resembles a brick on a construction site?"

"No, listening to Brother Ming's meaning, it's more like being stepped on alive, because the dislocation direction of the knuckles is inconsistent, and being smashed by something will definitely not have this effect, even if you directly break the metacarpal bones, you can't achieve such an effect."

The corners of Chu He's mouth twitched, he had just rehearsed it in his mind, he couldn't think what a mad murderer this was, not only killing innocent people one after another, but now even those with limited mobility did not let go, a gloomy atmosphere enveloped the entire conference room, which was like a stone pressing on everyone's chest, and their hearts were full of anger, which was about to explode at any time.

Everyone was very angry, but they all restrained this emotion and continued to listen to Chen Yang's introduction of the case, Chen Yang continued: "The teeth of the deceased No. 4 were loosened and lost in many places, and he suffered an impact from the inside of the mouth to the outside before his death. ”

Himeko-more asked, "In other words, the deceased bit something hard before he died?" ”

"It should be, my speculation is that the death should have bitten the murderer with all his strength before his death, and the murderer felt the pain and slapped the deceased's head hard, but the deceased did not let go, and then used his other hand to clench into a fist and hit the deceased in the face, and then pulled his hand out of the deceased's mouth, which can also explain why the deceased's teeth received an impact from the inside out." Chen Yang explained to everyone. Goshoya

You Jia asked: "Have the results of DNA and fingerprints come?" ”

"It's all out, and it's been submitted to the technician."

Zhang Haichuan answered this question and said: "The fingerprints and DNA have been compared with the database, and these deceased people did not have any criminal records before their deaths, and we have also screened the missing persons in the city recently, and we have not found the corresponding DNA and fingerprints from them, and the accurate identity information of the deceased has not been verified for the time being." ”

If you want to solve a homicide case, the most important thing is to determine the identity information of the deceased, because only after the identity information of the deceased is determined, can you use the identity information of the deceased to investigate and visit the people around the deceased, and you can also find out whether the deceased had a grudge with other people and all interpersonal relationships that have a special relationship before his death.

You Jia finally made a decision, now the first thing is to confirm the true identities of the four victims, let the field team continue to visit the people at the scene of the crime, and then Chu He and they will contact the Disabled Persons' Federation to check if anyone has suddenly disappeared or cannot be contacted during this time.

Chen Yang and Ji Ziyue basically bought some cheaper belts on the market, and even Yinglan took people to some places where daggers were specially bought to show the photos to some shopkeepers, and they were repeating a sentence all afternoon, they all said that their mouths were dry, they had asked nearly forty stores, and they did not find the slightest useful clue.

It wasn't until they stepped into a store again that the boss shook his head, and when Lian Yinglan was about to leave with someone, a person with a Shonan accent also looked at the photo and asked, "What kind of knife, can I take a look?" ”

Lian Yinglan took a large number of looks at the man in front of him, black and thin, with a pair of glasses, and spoke a thick Shonan dialect, perhaps Lian Yinglan's eyes frightened him, but he hurriedly waved his hand and explained: "When I was in my hometown before, because my family was in the knife business, I saw many kinds of knives. ”

"That's great, excuse me, can you help us take a look?" Lian Yinglan asked politely.

Lian Yinglan handed the photo of the knife to the enthusiastic crowd, who raised his glasses with his hand, took a closer look at the photo, and revealed a voice of surprise.

Even Yinglan felt that there was a joke when they heard this, and asked, "Have you ever seen this style of dagger?" ”

"Nope." The Shonan people shook their heads and denied it, and Lian Yinglan said depressedly: "I haven't seen it, what are you doing, we are happy in vain." ”

The Shonan man pouted and said: "The dagger on your photo is covered with a layer of rust, even the person who made this knife yourself may not recognize it when he sees this photo, you must be looking for witnesses to determine the source of the dagger, right?" ”

"How do you know?" One of the torturers brought by Lian Yinglan said.

At this time, the boss sitting at the counter couldn't help but smile and said: "This comrade Jingcha, you are really interesting, take a photo and ask people if they have seen it, are you not looking for the source of this dagger, are you looking for the person who made the dagger to apprentice?" ”

This criminal Jing was a little embarrassed, touched his hair embarrassedly, looked at Lian Yinglan with a flushed face, and Lian Yinglan patted him on the shoulder, but the boss gave them an idea, and after thanking them, let everyone go back first for the time being.

Waiting for the technicians to clean up the daggers, they will look for manufacturers according to the trademark on the handle, but as soon as they walk into the office with their front feet, the technicians on the back feet will send the information over, and Lian Yinglan will look at them with a black line.

They searched for the mark on the handle of the knife with a computer, and read the relevant information of the knife manufacturer, and the result was that this is a manufacturer specializing in forging, processing knives and manufacturing kitchen utensils, and the manufacturer's place is in Anxian County, Chengnan City, but it closed down a few years ago because of poor management, which means that this dagger is at least five or six years ago.

And this kind of dagger has not been circulated in the city, because the manufacturer has gone out of business, and the person in charge cannot be contacted, but they also know some clues, the first source of the dagger is in Anxian County, and the second is that the murderer is likely to be a local.

Lian Yinglan and the others informed You Jia of this important clue.