civil forensic

Chapter 134 Reconstruction Site
2 am.

There are no street lights, and on the road, a car will pass by from time to time, the headlights are dazzling, and the sound is harsh.

There are dots of stars in the sky, and the total number is about a few more than what you can see in the urban area.It’s just that very few people would look up, and even fewer people would count the stars leisurely. Even the children buried their heads in front of the table, without any thoughts.

There is still a dry and hot breath coming from all around, not the real temperature, but more of an anxious atmosphere.

It's like those workers who got off the night shift are mostly exhausted.

The supper business on the side of the road also had a stern face, and he tried to attract people a few times, and then retracted his arms perfunctorily.

The wandering wild dogs, looking at the passers-by, are too lazy to beg for food. During this period of time, the enthusiasm and initiative of feeding the dog is not enough, and it is unwilling to take risks to act cute.

Among the passers-by, many people are looking at the screen of their mobile phones. Some people are riding electric bicycles, still holding their mobile phones in their hands. Stop on the side of the road, check your phone for a while before leaving.

In the yard of the old scavengers, the dazzling white lights should have attracted a lot of attention, but most of them just took a picture and left, not even interested in watching.

There are too many hot spots and too many melons for everyone to eat.

What happens in the village in the city, the locals themselves don't care too much.Those who like to post Moments and videos on the Internet are not too happy to locate their locations in urban villages.

The death of an old man who scavenged waste did not cause any waves.

Jiang Yuan couldn't help recalling the life before the demolition of Jiangcun. At that time, although everyone was poor, they really had a lot of time.

Lazy and poor, but has a leisurely and happy atmosphere.

But the life in the urban village of Longli County is different. The people here are not only poor, but also have no time.

The whole village in the city is in the kind of situation left over from demolition and demolition.

No hope.

The air is full of exhaustion and helplessness.

The young people who returned to their hometowns to start businesses did not get any extra things except being close to home.

Jiang Yuan sat under the tree and drank a bottle of water, but he still felt very tired all over his body.

But he was young, and he didn't feel like he was going to die suddenly, so he should be able to work all night.

Jiang Yuan looked helplessly at the technicians of the Criminal Science and Technology Squadron in Longli County not far away. They were conscientious and busy like workers in an ant's nest, but there was no end in sight for their work.

Jiang Yuan couldn't help sighing.

The skills of these technicians may only reach LV0.8.

If they're serious enough, the chances of finding the killer's DNA in a confined area are pretty high, assuming the killer did leave DNA behind.

However, people's energy is limited, especially for long-term focus on small details, it is still very reluctant.

The small yard for the elderly who scavenged waste, the difficulty is almost like adding a cube.

In another case, it might not be so obvious.

An ordinary husband in an ordinary family, an ordinary domestic violence against an ordinary wife and death, the ordinary home environment is usually at a 2D level.

If you have customized the whole house and killed people in the customized room, it would be equivalent to 3D level at best.

Assuming that the whole house customization cost 15 yuan, killing people in the whole house customization room will waste an extra 5 yuan in the police department's case-handling funds.

But what is the structure of the small courtyard for the elderly who scavenged waste?
4D!
There are not only planes and heights, but also information such as bloodstains and DNA between objects.

That is to say, when wiping evidence in the old man's yard, you not only have to wipe the surface, but you also have to pick up those complicated objects and wipe the inner parts.

In the place where the old scavengers were beaten, the objects were repeatedly impacted, and the previous evidence was repeatedly covered, stacking up an astonishing complexity.

If you want to do it more carefully, you have to consider the time factor, because the time when each object falls is different, and there is a sequence, then different evidence will be contaminated at different times.

Finally, and most importantly.Even if the LV0.8 technicians present were able to wipe the murderer's DNA, how can they prove that it was contaminated on the day of the incident or that it was contaminated beforehand.

To switch to Jiang Yuan's LV4 crime scene investigation, he may have some ways to distinguish, but technicians below LV1 think about these things in vain.

Moreover, even if Jiang Yuan had LV4 crime scene investigation, he didn't want to use it to make similar distinctions.

It is too complicated, how to explain to judges and prosecutors in the litigation process?

Therefore, the best way to prove it, Jiang Yuan felt, was to stare at the bloodstains and the murder weapon.

Furthermore, don't look at this group of men who are now limp and limp after rubbing DNA, and their whole body is bent, but it is more difficult for their results to be effective than rubbing DNA.

Jiang Yuan decides to save them... and himself at the same time.

Jiang Yuan returned to the old man's courtyard, stood at the door, looked at the busy voices of a group of technicians, coughed twice, and said, "I have an idea."

A group of numb technicians stared at Jiang Yuan with blank eyes.

"I want to give priority to finding evidence of bloodstains, to see if I can find the bloodstains left by the murderer."

Seeing everyone looking over, Jiang Yuan continued:
"If it doesn't work, you can also use the analysis of blood stains to determine which objects the murderer touched at the scene, so as to narrow the scope of DNA testing."

Bloodstain pattern analysis is tantamount to reconstructing a crime scene.

And by reconstructing the crime scene, it is possible to "see" the murderer's travel route and most of the actions in the scavenger yard.

In this way, those objects that are closer to the murderer are more likely to be contaminated with the murderer's DNA.

The expressions of several technicians ranged from numb to a little excited and then a little numb again.

"This is different from the task assigned to us by our superiors."

A Xiankan named Hou Xiaoyong spoke first.

Jiang Yuan said unhurriedly:
"The task given to you by the criminal police team can't be to wipe DNA in a certain order. When doing on-site investigation, there are priorities. How to grasp it shouldn't be the scope of the on-site investigation?"

The few technicians were not stubborn, and they didn't expect the young forensic doctor from the next county to be so tough.

One of the older technicians, Lao Li, couldn't help standing up, took the opportunity to stretch his waist, twisted, and said, "Xiao Jiang, what should I do if the DNA is missed or contaminated according to the method you said? Who will be responsible? "

The other young technicians in Longli County were a little embarrassed to bow their heads. Their technical skills were already stretched.

Now that he wants to carry the ball to a forensic doctor from another county, the young technician is still a bit thin-skinned, especially after eating the food Jiang Yuan gave and smoking his good cigarettes just now.

"In the current environment, which DNA is not polluted?" Jiang Yuan snorted.

Two technicians laughed without winking.

Indeed, on this site, there is no talk of pollution. The objects collected from waste are all full of unknown DNA.

so many people……

The tall and young Jiang Yuan stood out among the group of people.

He opened his mouth and said:

"In this environment, bloodstains are the best way to prove your identity. It's a gamble anyway. If I had to choose, I would definitely bet that there is a murderer in the bloodstains. Again, betting on the analysis of bloodstains is better than betting on this scene. "

Several other technicians looked at each other and hesitated a little. They didn't want to wipe DNA like this, and it might be useless work, and they would still be scolded in the end.

"Besides, doing the bloodstains first is to preserve the most important evidence. Anyone who conducts on-site inspections and makes such a decision is absolutely correct. No matter where you go to check, you will not be able to tell a mistake. Or, you Call for instructions?"

Although Jiang Yuan is young, he is not stupefied. He came to help, not to take the blame, and kicked the ball back.

Several technicians were also inclined to Jiang Yuan's words.

It's better to have a direction than to work hard here.

Several people looked at each other.

The young Xiankan Hou Xiaoyong asked again:
"Jiang Forensic Doctor, will you reconstruct the crime scene?"

"meeting."

Jiang Yuan's answer was short and powerful.

"Reconstructing the crime scene is not easy..." Hou Xiaoyong couldn't help muttering.

To say that the closest to the analysis of blood morphology is Hou Xiaoyong, who is doing the current survey.However, he only knows a little bit of superficiality, and he is far away from reconstructing the crime scene or something.

The kind of people who watch the scene on TV and analyze it clearly...the reality is actually very little, and it's a bit nonsense.

The work of reconstructing a crime scene is not just a matter of ability, it also involves face and image, and even status.

When solving a crime in reality, reconstructing the crime scene, the reconstruction is the scene when the murderer killed or attacked the victim. Although it is cool, but the current survey needs to complete the reconstruction of the scene step by step, and then write down the process in detail to form a thousands of words Report copy.

Then next he might face the murderer's soul blow.

"You're wrong, I didn't do that at the time!"

Any surveyor, if he receives such feedback from the murderer, his emotions will definitely collapse.

There was no need to think about the laughter in the team.

Therefore, even those who are not skilled at reconstruction, even if they know a little about reconstructing crime scenes, they dare not reconstruct them.

After the construction is completed, should we pray that the murderer will be caught, or should we pray that the murderer will be killed on the spot?
Only a handful of people make it through the rough professional life of crime scene reconstruction.

And such people, by the time they are known, are usually already experts.

Hou Xiaoyong suspects that Jiang Yuan doesn't know the various problems he will face when reconstructing the crime scene.

After all, Jiang Yuan is younger than him.

But after thinking about it, these problems will only be faced if the reconstruction fails, and the reconstruction is wrong. If the reconstruction is successful, the so-called problem is not a problem.

Considering forensic doctor Jiang's attainments in fingerprinting, Hou Xiaoyong really didn't dare to talk nonsense.

All the technicians present knew that the county borrowed Jiang Yuan because he was young, and it was in the name of a forensic doctor.

The person borrowed it, and sent it to the crime scene without even showing the corpse. What the county really wanted to borrow was Jiang Yuan's fingerprint skills.

Hou Xiaoyong thought of this, and said: "Jiang Forensic Doctor, if you say that you need to change the order of on-site inspections if you want to collect fingerprints, I think it will be easier for the higher-ups to agree."

This is tantamount to telling Jiang Yuan how to apply.

Jiang Yuan just pretended that he didn't understand. At this time, the same sentence could play a role again - he was not from Longli County, so he asked the leader to apply, wouldn't it be even more dishonest.

"You can ask the leader for instructions, or let's just do it." Jiang Yuan thinks it's fine.

As he said, leaders usually require technicians to find clues, fingerprints, and DNA on the spot, and several leaders will arrange the order of on-site surveys in detail.

He has to understand it too.

"How long do you want?" Hou Xiaoyong asked.

"In the morning, 6 hours should be enough." Jiang Yuan looked at his watch (a simple and unpretentious nautilus), which meant that the time was more than 8 o'clock in the morning.

Hou Xiaoyong meowed, feeling inexplicably kind. The young man who still wears a watch now feels more mature, stable and cute.

"Let me call Captain Zheng of the Serious Case Squadron and talk about it. If he wants to report to the captain, let him report."

Hou Xiaoyong also didn't want to worry about this kind of thing, so he called the team leader Hou Le's family at two o'clock in the morning. Although they were relatives, there was no need to disturb people's dreams.

After a while, Hou Xiaoyong finished the call and returned.

Several people stood there waiting.

"Team Zheng has no objection, let's do it." Hou Xiaoyong said.

"Let's try to end the battle within five hours, leaving a margin for cleaning up." Lao Li, the most senior technician, compromised a little.

"Okay." Jiang Yuan agreed.

"What do you want us to do?"

In fact, Lao Li, a senior technician, also looked at Jiang Yuan as a fingerprint boss, put down his face, and asked Jiang Yuan as his respect.

Anyone, no matter what means he uses, who can solve 10 homicide cases, is a powerful figure in the criminal police team.

Such things as military exploits are finally made.

In the police force, solving crimes is the greatest achievement.

"Start at the door."

Jiang Yuan said decisively.

He simply returned to the door.

Starting from the starting point, I walked step by step and said:

"The murderer followed inside, brought his own murder weapon, and closed the door..."

"Why?" Hou Xiaoyong asked only after listening to the first step.

Like a poor student who actively asks questions.

Jiang Yuan put on his gloves, closed the door gently, and said:
"Because there is blood on the back of the door, if the door is not closed, it should be blood on the outside of the door. Of course, this is the blood that was caused later."

Hou Xiaoyong said "Ah!", and then "Oh!" again.

With such an explanation, he made it very clear, but just now, his mind didn't think about it at all.

The others also nodded in a sudden realization.

"In the later stage, trace evidence can be obtained here, which will help analyze the type of murder weapon. However, let's follow the murderer's steps first..."

Jiang Yuan then pointed to the front and said, "The murderer kicked the old man to the ground, then brandished the murder weapon to hit him..."

(End of this chapter)