Chapter 629: Evidence Collection Phase (Asking for Monthly Votes).

"Since it's an existing case, let's do it first." Jiang Yuan was not too picky. Theoretically speaking, the difficulty coefficient of the existing case itself is low enough. As for whether this case is difficult or not, we have to investigate it in depth before we can say it.

Since we have to investigate it in depth, it's better to solve it - Jiang Yuan has a very direct idea. He doesn't want to spend too much time on other cases, as long as there is no pitfall in this case.

Huang Qiangmin accompanied him on this trip, and Chai Tong was transferred again. Jiang Yuan felt that there should be no big problems in this regard.

Wang Chuanxing and others stepped forward, separated the case files, spread them flat on the long conference table, and everyone read them separately.

Jiang Yuan also sat down, took the forensic report again, took the photos, and took them one by one.

The forensic level of this case is still quite good. It is suspected to be carbon monoxide poisoning, and the heart blood was extracted immediately.

According to the concentration of carboxyhemoglobin in the heart blood, it can not only be determined that the deceased was poisoned by carbon monoxide, but also that the onset of the disease was not chronic poisoning, but acute poisoning - if the concentration of carboxyhemoglobin is 50%, it may be the former.

This is also consistent with the situation at the scene.

The victim did not even open the car door, and did not take any self-rescue measures. This shows that the deceased lost consciousness or the ability to control his limbs for at least a short period of time.

This shows from another aspect that the victim's body was not under control.

At the same time, the deceased's expression was natural, his clothes were complete, and the autopsy did not find any mechanical violent injuries - this proves from another aspect that the victim was not under personal control at the time.

So the question is, why was the victim poisoned by a high concentration of carbon monoxide in a closed car when he was not under personal control?

As a forensic doctor, Jiang Yuan first thought of controlling it with medication.

The forensic doctor did some toxicology tests, but they were all common drugs. In addition to common drugs, there are many drugs that can cause people to faint.

Jiang Yuan wrote the word "drugs" in his notebook.

Secondly, is it possible that an acquaintance committed the crime?

However, the victim died of acute poisoning. If the victim lived in the same room with the murderer, unless he wore a gas mask or something like that, he would definitely be doomed, not to mention...

Having said that, Jiang Yuan still wrote down the four words "acquaintance committed the crime".

The reason he wrote it down was because he suddenly thought that many people now wear masks on a daily basis. At least wearing a mask is not abrupt. If the murderer wears a mask with activated carbon, or a more special mask with adsorption, it is possible that it will last for a while.

Finally, is it possible that the person was killed outside and then moved into the car?

Jiang Yuan found the photos of the victim in the car after he was moved away. In the main driving seat, feces and urine flowed everywhere. Let's not discuss the issue of elegance. These filth were left by the victim on the eve of her death. In other words, at least her last moment was in this main driving seat.

Even if the murderer can move the body over, he can't move the feces and urine horizontally.

As for the last moment to move, it is still the conclusion brought by the content of carboxyhemoglobin in the heart blood. The victim died of acute poisoning, and there is not so much time for the murderer to find bugs.

In summary...

Jiang Yuan put down the paper and pen and said: "I'm going to investigate the car next. For others, I think we should check two directions first. One is the medicine. I want to do it in more detail. Can you contact the laboratory, Mr. Zhou?"

"No problem." Old Zhou is an old criminal policeman. He knows what Jiang Yuan is thinking. Although he doesn't agree with this idea, after all, if there is an unconventional medicine in hand, it can be directly poisoned to death. Why bother with carbon monoxide? It's just taking off pants to fart, right?

Therefore, although Lao Zhou had considered this idea, he did not bother the laboratory directly.

However, now that the 72-hour golden period has passed, or more accurately, the bronze period has passed, it is normal for Jiang Yuan to expand his investigation ideas.

"The victim's network of relationships should have been checked, right? Is there no result?" Jiang Yuan asked Lao Zhou again at this time.

Old Zhou shook his head and said, "There is no result at present. The victim's husband and wife have a stable relationship and have a child who is already in junior high school. The family is well-off and well-off. They have hundreds of thousands of yuan in savings, a three-bedroom, two-living-room house in Beijing, and two cars. Both parents are alive and well, and their lives are much better than mine, at least."

"What about others?"

"The victim is an employee of a state-owned enterprise. The relationship between her colleagues in the unit is not bad. She is just an ordinary office worker and has no overly sharp conflicts with her colleagues. As for relatives and friends, we have also verified them one by one, and they are generally shocked. She also lent money to two relatives, one for 50,000 and the other for 30,000. Then there are classmates and some customers, which may need to be checked in detail."

Jiang Yuan first expressed his approval and said, "It's amazing to find so much in three days."

Old Zhou smiled and took the initiative to say, "Then let's continue to investigate along the network of relationships?"

"Okay. Thank you for your hard work." Even if the people brought by Jiang Yuan are sent out for investigation, it is better to have local police with them, otherwise they are not familiar with all aspects. On the contrary, if it is a clear arrest, sending people directly will not have much impact.

"There is no surveillance at the parking lot, what about the surrounding area? Do you have any conclusions?"

"No. We specifically checked several important contacts, including the victim's husband, son, and debtors, etc., but none of them appeared in the surveillance that day. I also asked the owners of some cars around, but there was nothing useful."

"Okay. That's it for now."

For Jiang Yuan, the case was just beginning. No matter how many assumptions he had, he had to investigate before he could proceed.

Jiang Yuan arranged and instructed a few more items, and then said directly to Wang Chuanxing: "Chuanxing, you will be responsible for the remaining personnel allocation. I'm going to see the car."

"Yes." Wang Chuanxing agreed happily. He was actually a member of the Changyang City Criminal Police Detachment. Now that he has returned, although he is not a king, he is also very excited.

Jiang Yuan took Mu Zhiyang to the Criminal Science Center to see the car.

Wan Baoming of the Criminal Science Center can be said to be an old acquaintance. Knowing that Jiang Yuan was coming, he asked someone to clean the bathroom - the way to clean the body ensures the cleanliness of the bathroom!

Jiang Yuan didn't need to be polite. He dressed neatly and went to see the car.

Vehicle inspection room.

You can smell a strong smell as soon as you enter the door.

Jiang Yuan couldn't help but look at the two technicians in charge here. They had meaningful smiles on their faces.

"The body has been moved away, but there is no feces or urine." Wan Baoming expressed the most practical shock at the moment in the simplest words.

Even if it was a forensic doctor, Jiang Yuan couldn't help but frown.

"Wait until it's dry." A technician kindly advised.

"I don't want to come a second time." Jiang Yuan sighed heavily and walked forward to open the car door.

The strong smell of feces hit me in the face. It smelled bad and tasted... poisonous.

"Fingerprints and DNA have been collected... Find a whiteboard." Jiang Yuan had psychological expectations and survived.

A technician ran quickly, brought a whiteboard over, and put it in front of Jiang Yuan.

Jiang Yuan hung a series of fingerprint photos extracted by the trace inspection on the whiteboard, and then turned on the investigation light and leaned into the Mercedes-Benz A and other information involved in the case.

Pure trace inspection can only be divided into regions during the investigation stage, and there is no teamwork or anything like that.

Jiang Yuan's crime scene investigation skills have now reached the level 5 level, and it would be a waste if he didn't use it.

As for what the result will be, Jiang Yuan himself doesn't know.

In any case, this case gives Jiang Yuan a better feeling than the previous backlog cases.

The pressure of the current case will not be small, but that is for the elders. Jiang Yuan just needs to solve the case.

Jiang Yuan is more looking forward to doing a simple crime scene reconstruction through some... liquids, solids and other traces.

If it is possible to infer what happened at the crime scene, perhaps the source of the carbon monoxide that killed the victim can be understood.