Chapter 192: Finding Order From Disorder

When dealing with murders, the most fearful thing is to have no clues.

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

Just like some people use guns to kill their entire family, and then run to the mountains, the local government can organize a search team of thousands of people in minutes.

Many murder case task forces organize large-scale investigations, sometimes just to use the human resources at hand as much as possible. Regardless of whether it is sufficient or necessary, at least let the task force members have something to do.

Having nothing to do is a huge blow to the morale of the task force.

Jiang Yuan submitted the clues, and the 724 Qinghe Major Homicide Task Force sent people to start the investigation overnight.

18 years old is the age of a senior high school senior or a freshman, and learning ballet proves that the family conditions are good, so 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 learned ballet, even if it is traced back several years, the list is short of only one person.

Zhang Xiaoyun.

A native of Jianjiang City, and a student of Jianjiang City No. 1 Middle School.

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

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

It was purely because the condition of ballet was too narrow, so they could easily expand the search range to several neighboring cities... and this once again proved one thing:

The murderer did not kill people in the local area.

This is very inconsistent with the modern trend.

The current business atmosphere and cultural atmosphere are all about localization and social circles.

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

Killing people without looking at the ID number...

Of course, it is easy to understand that the murderer is a little rebellious.

But the members of the task force had to start self-reflection:

The murderer does not pay attention to localization when killing people, so how big is his range?

This is not a joke.

The murderer's murder psychology will change according to the environment.

Some murderers become unscrupulous and violent when they are away from home, but when they return home, they are still obedient, eating and drinking as usual, being beaten by their wives, being angry by their leaders, and not changing at all.

Some murderers kill people in one place, and this is the mainstream. Especially those who like to dismember bodies, most of the dismemberment places are in their own homes.

Reality often responds to this choice in a weird way.

A typical case is Jia Wen'ge from Nehe City. He and his team members killed 42 people locally for more than three years, attracting a special task force, but nothing happened.

In order to avoid the limelight, he fled to Hangzhou City, and only did a few traps, but he didn't dare to kill anyone, so he was arrested. Three months later, he was shot.

The murderer of the 724 case should be familiar with the reservoir and dumped corpses there all year round, so he should also be a local.

But the only two corpse sources are not local.

The deceased No. 1 came from Wanxiang City, the westernmost city of Shannan Province. It is very likely that he went on a business trip to Qinghe City and died in Qinghe City. But it is also possible that he died outside Qinghe City, such as Jianjiang City.

Now, the deceased No. 5 is directly a student in Jianjiang City. He has limited mobility and is likely to have died in Jianjiang City.

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

It is not surprising to abandon the body in the next city. Those with some anti-reconnaissance ability know that this will increase the difficulty of detection. Ancient bandits also knew to choose the junction of three provinces.

And for the task force, the difficulty seems to have really increased.

For two consecutive days, the meeting room of the Qinghe Municipal Bureau was filled with various quarrels.

Fortunately, Jiang Yuan did not have to go to the meeting anymore.

He stayed in the dissection room and studied bones every day.

These bodies 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 most useful, but it is not indispensable. The hip bone is also good, the skull is also fine, and 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.

But if you want to make further judgments on the source of the corpse, it is obviously more difficult.

The remaining corpses 2, 3, 4, and 6 are all complicated in their own ways.

The 4 dissection tables in the dissection room just display 4 corpses.

Wang Lan assigned a corpse to each of the forensic doctors, but skipped Jiang Yuan.

The first two corpses all depended on Jiang Yuan's judgment, so his knowledge of forensic anthropology is obviously enough for the job. It may even be far better than everyone else.

Wang Lan can't help much except giving him full trust.

On the first day, Jiang Yuan was patrolling in front of the 4 corpses.

After that, Jiang Yuan spent more and more energy on the corpse numbered 3.

Corpse No. 3 was the one that was chopped by an axe.

The lumbar vertebrae and leg bones of this corpse were severely worn, and Jiang Yuan initially judged that it was engaged in physical labor.

Of course, there was nothing wrong with this judgment, but the area was too large, and it was basically impossible to find the person.

Initially, Jiang Yuan was also prepared to study the traces of the axe.

If the type of axe can be determined, even if the case cannot be solved, some clues can be obtained. For example, the fire axe commonly seen by people nowadays, or the small axe used for chopping wood, etc., must not be bought by many people.

Facts have proved that Jiang Yuan still underestimated the tool mark inspection. With his skills in this area, he could not find out the origin of the axe at all.

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

The underwater world is a closed world. To determine the time of death of a corpse that has been there for so many years, we usually have to seek help from the outside world. For example, see how many generations the maggots have reproduced, how long the algae have grown...

Don't say that the conditions are not quite met, even if they are met, the judgment of the time of death can only be estimated in years.

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

In the current case, if you encounter a fresh corpse with heat, you can still measure the liver temperature and rectal temperature. The case is so old that the liver and anus are gone, and it is unknown whether the microorganisms have been updated...

In the end, what Jiang Yuan can study is the simplest traces on the bones.

In theory, the skeleton 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 flesh are removed, and only the bones are observed, what is the most common skeletal trace?

The incidence of excessive wear of the cervical vertebra must be extremely high.

Jiang Yuan has seen the wear of the lumbar vertebra and leg bones of the corpse No. 3. After further observation, he finally judged that the wear of his knees, tibia, and even heels should be from daily life or occupation.

It’s just that what kind of occupation would wear these parts, which makes Jiang Yuan a little confused.

He thought about it for a while, but he didn’t think it through, so he called Liu Jinghui directly.

In Jiang Yuan’s opinion, Liu Jinghui, who is engaged in reasoning, can probably be useful at this time.

Liu Jinghui, the fourth-level senior police officer of Shannan Provincial Department, rushed to the autopsy room as soon as he received 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: "Many things can only be clear after seeing them in person."

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

The tibia is the calf bone, or to be more precise, it is the relatively large inner bone in the calf.

It is very hard and can be held in one hand. The clever ancients discovered the characteristics of the tibia very early, so thousands of years ago, they ground the tibia into a dagger and opened a blood groove in the middle.

According to the shape of the unearthed cultural relics, the tibia is still a very good material for daggers.

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

"Explain it to me." Liu Jinghui sighed.

Several forensic doctors also came quietly over, wanting to listen to Jiang Yuan's on-site explanation.

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

Liu Jinghui still couldn't see it.

"So I said, just tell it over the phone." Jiang Yuan said.

"It's not far anyway." Liu Jinghui argued, then turned his attention back to the corpse and asked: "What actions did you do to cause these wear and tear you mentioned?"

"Maybe squatting frequently or something like that." Jiang Yuan said and simulated it.

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

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

"Oh..." Liu Jinghui clicked his tongue twice and looked at Jiang Yuan: "You know a lot, you are worthy of being from Jiangcun, you are so young..."

"I mean waiters, such as shoe sales, or first-class flight attendants."

"Men can also do these jobs, do they have to be so rigid about gender?" Liu Jinghui joked first.

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

"First-class flight attendants who often carry luggage. Or, part-time shoe sales at express delivery points at night?"

"I'm just giving examples." Jiang Yuan shook his head and said: "Judging from the age of the deceased, he spends much more time squatting than a profession like selling shoes."

"Electric welder?"

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

"Athletes of certain sports, such as skiing?"

"It's also possible."

Liu Jinghui guessed a few more professions and almost understood Jiang Yuan's judgment.

"This murderer kills people randomly." Liu Jinghui sighed.

Jiang Yuan said "yeah", put the tibia in place, looked at the other bodies, and asked Liu Jinghui, "How is the task force?"

"It's a mess." Liu Jinghui said in a deep voice.

"Didn't the provincial department send you to assist in the command?" Jiang Yuan looked at Liu Jinghui.

"My judgment is that 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 backlog of homicide cases in various provinces, random crimes account for more than half, and there is a reason for this.

"We have to accumulate known conditions. To find order from disorder and list known conditions, this is the most basic step." Liu Jinghui said: "I called two more teams of frogmen to see if there are any bodies in the reservoir. If they can't be fished out, the few bodies we have now are all we know."

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