civil forensic

Chapter 193 Finding Order From Disorder

In a murder case, the most fearful thing is that there are no clues.

As long as there are clues, there is no shortage of manpower.

It's as if someone used a gun to kill the family, and then ran up the mountain, and a search team of thousands of people could be organized in a minute.

Many homicide case teams organize large-scale investigations, sometimes just to use up the human resources in their hands as much as possible.Regardless of whether it is sufficient or not, necessary or unnecessary, at least let the personnel of the task force have something to do.

There is nothing to do, and the blow to the morale of the task force is huge.

Jiang Yuan handed over the clues, and the 724 Qinghe Extraordinary Homicide Task Force sent people to start the investigation overnight.

The age of 18 is the third or freshman year of high school. Learning ballet proves that the family is in good condition. Therefore, the deceased is likely to be a student.

Pull out the list of missing students in Qinghe and several surrounding cities, plus the attribute of having studied ballet, even if you go back a few years, the list is as short as one person.

Zhang Xiaoyun.

A native of Jianjiang City, and a student of No. [-] Middle School of Jianjiang City.

Jianjiang City is adjacent to Qinghe City, and its economic level is not much different from that of Qinghe City. There is only one training institution in the city that teaches ballet, so it is very easy to find.

But after the DNA comparison and matching, the members of the task force were still a little scared.

It is purely because the condition of ballet is too narrow, so they can easily expand the search range to several nearby cities... And this proves one thing again:

The murderer didn't just stick to the local area to kill.

This is very inconsistent with modern trends.

The current business atmosphere and cultural atmosphere all pay attention to localization, starting to talk about circles.

Even blind dates have begun to add the first 6 digits of the ID number in front of the requirements for having a car and a house.

The murderer didn't even look at the ID number...

Of course, it is easy to understand for a murderer to be a little rebellious.

But members of the task force had to start self-reflection:
The murderer doesn't pay attention to localization, so how big is his scope?
This is not purely a joke.

The killer's killing psychology will change according to the environment.

For some murderers, he will become unscrupulous and violent when he is out of town, but when he comes home, he can still be obedient, eat and drink what he should eat, be beaten by his wife, and angry with the leader, nothing has changed.

Some murderers only kill in one place, and this is the mainstream.Especially for those who like to dismember the corpse, most of the places where the corpse is dismembered are in their own homes.

Reality often responds to this choice in a strange way.

A typical case is Jia Wenge in Nehe City. He and his team members killed 42 people in the local area. They worked for more than three years and attracted a task force, but nothing happened.

In order to avoid the limelight, he ran to Hangzhou and did a few fairy dances. He didn't dare to kill anyone, so he was arrested, and three months later, he was shot.

The murderer of the 724 case is said to be familiar with the reservoir and has dumped his body here all year round, so he should also be local.

But the only source of corpses is not local at all.

The deceased number 1 came from Wanxiang City, the westernmost city in Shannan Province.It is very likely that he went to Qinghe City on a business trip and died in Qinghe City.But it is also possible that he died outside Qinghe City, such as Jianjiang City.

Now, the deceased number 5 was directly a student of Jianjiang City, with limited mobility, it is likely that he died in Jianjiang City.

So, the murderer lives in Jianjiang City, which is adjacent to Qinghe City?

It is not uncommon to dump corpses to the next city. Anyone with a little anti-reconnaissance ability knows that this will increase the difficulty of detection. The ancient bandits also knew to choose the border of the three provinces.

For the task force, the difficulty seems to have really increased.

For two days in a row, the meeting room of the Qinghe Municipal Bureau was filled with the sounds of various quarrels.

Fortunately, Jiang Yuan didn't have to go to the meeting anymore.

He stayed in the dissecting room, studying bones every day.

These corpses have been soaked in water for a long time, and most of the skin and flesh have rotted away. The exposed bones have been soaked in a large amount of corpse water, and the color and texture of the bones have changed to varying degrees.

This change is not a problem for some basic judgments.

Just like judging gender, the pelvis is the best to use, but it is not indispensable. The hip bone is also good, and there is no problem with the skull. The mandible, sternum, and femur can all be used.

On this basis, even if the bones have been soaked for a long time and eaten by some microorganisms, it will not have much impact.

However, it is obviously more difficult to further judge the source of the corpse.

The remaining corpses of numbers 2, 3, 4, and 6 each have their own complexity.

The 4 dissecting tables in the dissecting room happened to display 4 corpses.

Wang Lan assigned a corpse to several forensic doctors, but only crossed Jiang Yuan.

The first two corpses all depended on Jiang Yuan's judgment, so his knowledge of forensic anthropology was obviously sufficient for the job.It may even be far ahead of everyone.

Apart from giving him full trust, Wang Lan couldn't help him much.

On the first day, Jiang Yuan was parading in front of the four corpses.

Afterwards, Jiang Yuan devoted more and more energy to the No. 3 corpse.

No. 3 bone is the bone that has been hacked by an axe.

The lumbar spine and leg bones of this corpse were severely worn, and Jiang Yuan's initial judgment was that he was engaged in manual labor.

Of course, there is no problem with this judgment, but the scope is too large, and it is basically impossible to find someone here.

Initially, Jiang Yuan planned to study the traces of the axe.

If the type of ax can be determined, even if the case cannot be solved, certain clues can be obtained.For example, there are not many people who buy fire axes that are common nowadays, or small axes for chopping wood, etc.

Facts have proved that Jiang Yuan still underestimated the inspection of tool traces. Based on his skills in this area, he couldn't find out the origin of the ax at all.

Judging the time of death... This path is naturally even more impossible.

The underwater world is a closed world. For such a long-aged corpse, to determine the time of death, it is usually necessary to turn to the outside world for help.For example, look at how many generations the maggots have reproduced, how long the algae have grown...

Not to mention that the conditions are not met, even if they are met, the judgment of the time of death can only be estimated in units of years.

In fact, the judgment of the time of death is the most difficult and profound part of forensic science, in other words, it is the most inaccurate part.

In the current case, if you encounter a fresh corpse with heat, if you can still warm the anus through the liver, take a measurement.The old case is so old now, the liver is gone, the anus is gone, and the microbes don't know if they have been updated...

In the end, what can be studied by Jiang Yuan is the most simple bone trace.

In theory, bones can provide a corpse with many traces of life, not only life, but also work, disease, or environment.

An example suitable for modern people, if 20 people are killed in the subway, the skin and meat are cooked, and only the bones are observed, what are the most common traces of bones?
The incidence of excessive wear of the cervical spine must be super high.

Jiang Yuan has already seen the wear and tear of the lumbar spine and leg bones of corpse No. [-]. After further observation, he finally judged that the wear and tear of his knees, tibia, and even heels should be from daily life or occupation.

It's just that what kind of occupation will wear into these positions, which makes Jiang Yuan a little confused.

He thought about the time for a meal of instant noodles, but after thinking about it clearly, he called Liu Jinghui directly.

From Jiang Yuan's point of view, Liu Jinghui, who is engaged in reasoning, may come in handy at such a time.

Liu Jinghui, the fourth-level senior police chief of the Shannan Provincial Department, rushed to the autopsy room after receiving the call.

Jiang Yuan found him a protective suit, and said, "You don't actually need to come here, we can just talk on the phone."

Liu Jinghui shook his head: "There are many things that can only be clarified by seeing them in person."

"Okay." Jiang Yuan led him to No. 3 dissection table, handed him a tibia, and said, "You can see for yourself."

The tibia is the lower leg bone, or more precisely, the relatively large inner bone of the lower leg.

Its hardness is very high, grasping it in the hand, just holding it with one hand - the smart ancients discovered the characteristics of the tibia very early, so, as early as thousands of years ago, they ground the tibia into a dagger, with a gap in the middle blood tank.

Judging from the shape of the unearthed cultural relics, the tibia is still very good as a dagger material.

However, just as evidence, Liu Jinghui looked over and over for a long time, but couldn't see anything.

"Please explain to me." Liu Jinghui sighed.

Several forensic doctors also quietly came over, wanting to listen to Jiang Yuan's live lecture.

"The wear and tear is mainly here. The bone becomes rough." Jiang Yuan held the tibia in his hand, and showed Liu Jinghui the selected side.

Liu Jinghui still didn't see it.

"So I said, just talk on the phone." Jiang Yuan said.

"It's not far anyway." Liu Jinghui argued, then turned his attention back to the corpse, and asked, "What kind of movements did you make of the wear and tear you mentioned?"

"Maybe squatting often." Jiang Yuan said and simulated it.

Liu Jinghui looked carefully and nodded slightly: "Knee, tibia, heel."

Jiang Yuan nodded: "It's a pity that it's a man. If it's a woman, it might be in the service industry."

"Oh..." Liu Jinghui clicked his tongue twice, and looked at Jiang Yuan: "You know it very well, you are indeed from Jiangcun, and you are so young..."

"I'm referring to attendants, like a shoe salesman, or a first-class flight attendant."

"Men can also do these jobs. Shouldn't the gender be so stuck?" Liu Jinghui joked first.

Jiang Yuan curled his lips: "Heavy physical strength."

"A first-class flight attendant who often carries luggage. Or, a part-time shoe seller who goes to a delivery point at night?"

"I'm just giving an example." Jiang Yuan shook his head and said, "Judging from the age of the deceased, the time he spends squatting in daily life is much longer than that of a shoe seller."

"Welder?"

Jiang Yuan hesitated for a moment, nodded and said, "It's possible."

"An athlete of a certain sport, like skiing?"

"Also a possibility."

Liu Jinghui guessed a few more occupations, and he almost understood Jiang Yuan's judgment.

"This murderer killed people very casually." Liu Jinghui sighed.

With an "en" sound, Jiang Yuan placed the tibia, looked at the other corpses, and asked Liu Jinghui, "How about the task force?"

"It's a chicken feather all over the place." Liu Jinghui said in a deep voice.

"Didn't the provincial department send you to be a staff officer?" Jiang Yuan looked at Liu Jinghui.

"My judgment, this person probably committed the crime randomly." Liu Jinghui also looked at Jiang Yuan: "Do you know how to solve this kind of case?"

Jiang Yuan shook his head.Among the homicide cases in various provinces, random crimes accounted for more than half, and it was not without reason.

"You have to accumulate known conditions. Finding order from disorder and listing known conditions are the most basic steps." Liu Jinghui said: "I called two more teams of frogmen to see if there are any problems." Are there any corpses in the reservoir? If not, the few corpses are all we know.”

(End of this chapter)