Chapter 372 There Is Always One that Suits Him

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Jiang Yuan did not dissect the body in the normal order, but first carefully took trace evidence from the wound on the chest.

When the murderer killed someone, he used a lot of strength and the speed of the dagger was very fast. He stabbed into the victim's heart and slipped in until the guard of the dagger hit the victim's chest.

At the same time, the front edge of the dagger also touched the victim's ribs. From the situation of dissection, it was indeed scratched.

In this way, the victim's wound is likely to have trace evidence of the murder weapon. As for whether this evidence will help solve the case, it is not certain, but it is likely to help as court evidence.

In fact, it is not so easy to nail a murderer to death. When the evidence is not sufficient, the court often reduces the sentence. Especially when it comes to the death penalty, the requirements for evidence and chain of evidence are more than one level higher.

Therefore, sometimes the court would rather give a suspended death sentence than directly give the death penalty. Because even if you give it, it may be rejected during the review of the death penalty, and you will still be embarrassed.

Criminal investigators like Jiang Yuan are particularly popular in various places, and it is also because he is a forensic doctor who speaks with physical evidence. Solving a case is not just about solving the case, but also about providing a full set of evidence, and the chain of evidence is relatively complete. Unlike Liu Jinghui, who sounds logical and rigorous, but in court, it's all about talking.

Wu Jun watched Jiang Yuan remove the skin lesions on his chest and handed him the rib clamp.

The rib clamp used by forensic doctors is the same as the rib clamp used by cardiothoracic surgery. In essence, they both use the principle of labor-saving levers to clamp bones. The difference is that the rib clamps used in cardiothoracic surgery are often small and exquisite, and expensive, while the rib clamps used by forensic doctors are not so exquisite, and are often large and rough, looking bulky and powerful.

Jiang Yuan clamped the bones, took a photo, and then carefully sampled again, and then directly cut off a section of the rib with traces.

Human ribs and pig ribs have many similarities. If the body has just been cremated, it is said that it has a similar taste to roasted pig.

The ribs that have just been cut are a bit like pork ribs. Wu Jun specially wrote a label with a pen to indicate it.

In addition, the heart is also the focus of sampling.

Finally, a whole bucket of internal organs, including the heart, liver, lungs, spleen, kidneys, brain, as well as pancreas, thyroid and adrenal glands, are all soaked in formalin, and then samples are taken from all parts, cut into small strips, and then put into the dehydrator for dehydration.

After dehydration, Wu Jun has heated the paraffin.

The melted paraffin is put into a small grid, and then the dehydrated specimen, that is, the cut organs are put into the wax. When the wax solidifies, a wax block like amber is obtained.

Then, the wax block is put on the slicer, cut into thin slices, and finally put into the slicer.

In the slide spreader, the slice will open due to the tension of the water, and the wax wrapped around it will be melted, and finally only a thin piece of tissue will remain.

This process is very technical and is also a great test of the forensic skills.

Especially when the samples are limited, if the forensic fails several times, the samples may be used up and nothing will be obtained in the end.

These slices are not only used for archiving and as evidence, but also for future review and inspection. Especially for the review of the death penalty, these key evidences must be checked.

In other words, if the criminal is to be sentenced to death, the handling of the samples must be done well.

Jiang Yuan did it very seriously.

Wu Jun accompanied him until the end of the autopsy, and when the bodies were pushed into the ice coffin, he said: "Don't forget, you promised Director Huang that you can solve the case."

"I remember." Jiang Yuan nodded.

"Can it be solved?" Wu Jun was full of doubts.

"It should be solved."

"How?"

"I don't know yet." Jiang Yuan replied, and felt that he was a bit nonsensical, and hurriedly said: "I still have confidence, but I don't know how to solve the case."

Wu Jun sighed: "So don't be too sure. Don't agree so quickly at that time, it will be easy now. Director Huang should still express his opinion when he should."

Jiang Yuan just said "yeah" twice. With his current skill combination, he was too cautious and felt that it was not acceptable.

Although the case in front of him did not point directly to the murderer from the autopsy, Jiang Yuan thought that there were still many options.

Wu Jun just reminded Jiang Yuan twice, and seeing that he did not look worried, he felt relieved and lit a brazier in the room.

Jiang Yuan did not need him to say anything, and he jumped three times obediently.

The two took a car back to the Criminal Police Brigade.

In the conference room, intelligence was constantly sent in, and several squadron leaders were also discussing in a low voice.

It is still the early stage of the investigation, and the direction of the investigation has not yet been determined, so the main work is done by the criminal department team, that is, collecting evidence at the scene and analyzing the evidence at the scene.

Jiang Yuan went in, without being polite, and first found someone in the video office to check the surveillance.

"The murderer should not have taken the usual route. We have surveillance in the main direction, but no one was photographed. At least for now, the suspect has not been locked." Zhuang Wei, the first generation in the video office, now has a very high degree of trust in Jiang Yuan, and he even returned a little bit of nervousness.

Ningtai County spent so much money to upgrade the surveillance equipment. If it doesn't work, it will not only be funny, but all the people in the video office will suffer.

Jiang Yuan was more confident than Zhuang Wei. While looking at the surveillance camera, he asked, "Didn't you find any trace of the suspect?"

"I'm not sure about the suspect's physical characteristics yet." Zhuang Wei is also a little helpless. Now he doesn't even bring photos with him when looking for someone, so he doesn't know which person he is looking for.

"Where did the police dog chase?" Jiang Yuan asked the police officer next to him.

He dispatched the police dogs not to get direct answers.

However, judging from the blood splattered at the scene, the murderer must have left with some of the blood. Through the sniffing of the police dogs, it was almost possible to determine the direction in which the murderer left.

The officer nearby pointed east.

Zhuang Wei also explained: "We have also extended the investigation scope to the east, but there are no obviously suspicious people."

"If the surveillance can't find clues, we have to change our thinking..." Liu Jinghui stood up and tried to help reorganize the case.

Jiang Yuan did not follow Liu Jinghui's baton and said first: "On the street at three o'clock in the morning, even a person appearing on the street is considered suspicious."

Liu Jinghui was stunned: "We can't check all the newcomers... Well, the murderer is most likely an outsider. From this point of view, the outsider who is still lingering on the street at three in the morning is very likely to be the murderer?"

"You can go through this idea first." Jiang Yuan still maintained a relatively relaxed attitude.

Detecting crimes through surveillance is only a relatively easy way, not the only way.

Zhuang Wei shook his head again and said: "Since 3:30 in the morning, not many people have been caught in the surveillance. We have been looking for people along the transportation. As of now, there is no one who looks like the murderer."

What he said was quite loose, but everyone present could understand it.

People who are still wandering outside in the early morning, even if they walk a certain distance, will still have to take transportation in the end. Based on the transportation, the identity of most people can basically be determined.

Of course, there will definitely be someone whose identity is difficult to determine, but the murderer will look like a murderer, will be nervous, will walk fast, and will look around. In short, some murderers can pretend to be normal people, but some people At first glance, he doesn't look like a murderer.

After all, what the police were facing was not 007. From Zhuang Wei's point of view, although the person who was still wandering around outside at three or four o'clock in the morning was quite strange, he did not look like a murderer after all.

Jiang Yuan picked a few surveillance cameras from that time period and looked at them for a while, but found no clues.

At this time, everyone's expressions became a little solemn.

Could it be that there is really something wrong with this incident?

Jiang Yuan's expression did not change at all. He just asked people to mark the positions of the cameras near the bar, looked at them carefully for a while, and then said: "Captain Zhuang, please continue to watch the images, especially analyze the time until 3:30. During four o'clock, the surveillance near the bar. I will go to the scene to take a look."

"Okay." Zhuang Wei agreed.

Mu Zhiyang, who was nearby, quickly got up and prepared to follow Jiang Yuan to the scene. At the same time, he asked, "Do you want to watch the scene again?"

"Well, the surveillance coverage on Bar Street is wide enough. If there are no traces of the murderer, we must consider that the murderer did not come in and out through normal means." Jiang Yuan curled his lips and said: "If this is the case, the murderer It will only leave more traces.”