civil forensic

Chapter 188 Corpse Source
Using a certain bone to infer the state of the corpse before death is basically based on statistics.

For example, the judgment of height is easy to judge based on long bones.That is, the thigh bone, the calf bone, and the humerus of the upper limbs-it is easier to understand with the description on the pork stall, it is the tube bone.

The common folk saying "this child has long legs, so he must be tall when he grows up", is essentially similar to the judgment model of forensic doctors.

However, if we really want to talk about accuracy, there are also problems.

If the height is the goal, there must be a difference between the long-legged model and the short-legged model, judged by the long bones.

For this reason, forensic doctors began to do various regression equations based on bones in different positions to judge height.

The same goes for the lumbar spine.

It's just a little more complicated.

For example, first divide men and women.

Secondly, the first lumbar vertebrae to the fifth lumbar vertebrae are different.

Each lumbar spine has ten measurement points, including the anterior height of the vertebral body, the posterior height of the vertebral body, the upper sagittal diameter of the vertebral body, and the lower sagittal diameter of the vertebral body...

There are 19 regression equations in total.

It will be annoying to memorize it.

Normal people are not very good at reciting this regression equation, just know where to look it up.

But what Jiang Yuan took was the LV3 forensic anthropology script, so he couldn't check it out, and the memorized script was a bit more compelling.

For laymen, there is a high probability that it will not touch anything.

It's different for insiders.

It seems that ordinary people buy a reference book such as "Anthropometry Handbook", and they can also choose a book published by Cihai Publishing House.In the end, I saw Jiang Yuan, who seemed to have memorized the "Anthropometry Manual".

In any workplace, whoever meets such a colleague will not be confused?
Jiang Yuan didn't have anything to say, he just measured a few more data with a ruler, and silently checked and calculated several times.It doesn't feel like a big deal.

Things like regression equations can be understood as formulas summed up from experience. Where the formula is, the data is also here. Substituting it in, the result is what the result is.

A young doctor secretly washed his gloves, took them off again, washed his hands clean, put on new gloves, searched his phone, and came to the same conclusion.

Then, he went to cook the bones silently.

Wang Lan pondered and said: "A 1.7-year-old woman with a height of 40 meters, there should not be many such people in Qinghe City."

"I'm afraid it doesn't belong to Qinghe City. Throw it far away and bury it near." Another city bureau forensic doctor pondered slightly.

Fortunately, it was Wang Lan who took the lead this time. He really didn't have any confidence in the case in front of him.

A murderer who kills one person may be full of flaws, but if he kills four people, he should gain some experience.

Some of the forensic doctors here have never participated in the four dismemberment cases.

And these four corpses were handled really well. If the water in the reservoir hadn't receded to a historically low level, maybe in a few decades, no one would know that there were corpses here.

Wang Lan frowned, and said: "It is indeed a general rule to throw far away and bury near, but these corpses are closer to burying corpses than simply throwing them away. Moreover, four times in a row, in the same place, there is no It's like it's too far away."

Throwing far away and burying near near is talking about the rules summed up by criminal investigators.

Generally speaking, if the murderer throws the corpse, if the distance is far away, he will choose to throw the corpse directly, and if the space distance is relatively short, he will choose to bury the corpse.

It's very interesting psychology.

In essence, if the corpse is thrown and buried at a long distance, the difficulty will naturally be greater.But in actual operation, the murderer was in a strange place, obviously unwilling to stay for too long.In other words, there is actually a range of time the murderer is willing to spend disposing of the corpse...

And what the two of them were discussing was actually this question.

Should the corpses in the reservoir be dumped or buried?

The core point of burying corpses actually takes time to dig.Because the murderer has a strong sense of insecurity in an unfamiliar place, the murderer is usually reluctant to spend too much time and energy digging in a place far away from his familiar place and the center of his life and work.

But it's impossible to say that the murderer didn't want to throw the body more secretly.

Therefore, sinking into the reservoir itself tends to throw corpses.

If so, it means that the range of sources of corpses has been greatly expanded, and the victim does not necessarily have to be in Qinghe City, or even die in a nearby city.

From the perspective of determining the source of the corpse alone, the difficulty is tantamount to full.

Wang Lan shook her head slowly, and continued: "I personally tend to dump the corpse, and the specific direction of investigation, let the leaders bother."

Jiang Yuan didn't say a word.

He also prefers that the source of the corpse is nearby.However, this is not an exclusive answer, and unexpected situations may still occur.

However, even if Jiang Yuan is the person in charge, he will come to the same conclusion as Wang Lan.Otherwise, the case would be too difficult from a forensic point of view.

Through the technology of forensic anthropology, finding the source of corpses is essentially finding intersections, just like drawing circles on a blackboard, and constantly looking for the intersection points of these circles. In the end, when the number of people intersecting is small enough, it is easy. Found the source of the corpse.

For example, for the corpse number 1 in front of you, there is one circle for women, one circle for around 40 years old, one circle for having given birth, and another circle for the height of 1.7 meters.

A circle that can meet these conditions, plus a circle of missing persons in Qinghe City, the final intersection is likely to be only one, and at most a few people can meet it.

Then the source of the corpse can be basically determined.

Determining the source of the corpse is the first step in such a case.It can even be said that only when the source of the corpse is confirmed can the case be opened—this is also Wang Lan's task.

"That... Xiaozhuang, you make a record." Wang Lan called the name of a young forensic doctor.

Xiao Zhuang said "Oh", and immediately went to take off his gloves and wash his hands.

After some tossing and recording, another pot of corpses was boiled out.

Skim off the foam, pour off the corpse soup, take out the bones with fascia, and then shovel them clean, and unfold the characteristic bones on the second dissecting table—the reason for skimming off the foam is also the experience of the last pot , Just pour the soup, the foam will stick to the bones, and it will take two rounds of cleaning.

As a result, the dissecting table is not enough.

Four corpses are still too many. The dissecting room in Qinghe City has already enlarged the demand, but one corpse cannot occupy two tables.

However, it is not acceptable to put the body bag with the plastic bag directly on the ground.The sewage on the ground is flowing, and the plastic bags are actually part of the evidence...

So, after a lot of tossing, the other two packages of corpses that had not been opened were carried to an autopsy table, and then the two packages of corpses that were opened were concentrated.

A body bag and a person, there are stones in it, and water that may have seeped in. It takes three or even four people to lift it up and up.

As a female forensic doctor, Wang Lan can only stand by and cheer...

after an hour.

The forensic doctors who went to eat came back, and at this moment, the second corpse here was also figured out.

"35 years old. Male. About 1.7 meters tall..." Jiang Yuan quickly gave a judgment.

Wang Lan agreed, and said to herself: "There are men and women, but the height is the same."

"Serial killers like to kill people with a height of 170 centimeters, regardless of gender and age." A forensic doctor made a personal summary.

Xiao Zhuang, who was taking notes next to him, couldn't help but look up and said, "Would you like to listen to what I'm talking about?"

"what?"

"In China, people who like to kill people who are 170 centimeters tall will die of exhaustion."

"Oh, there may be other superimposed factors..."

Xiao Zhuang didn't bother to talk to him, but instead said, "I think this method of dumping the corpse is a bit like the double-faced forensic doctor in American dramas. It's also called bloodthirsty forensic doctor."

"I only read the beginning, how did he throw it away?" Wang Lan immediately paid attention to it.Imitation criminals are a big category among murderers.

Xiaozhuang sorted out his words, and said: "He is often in a container, covered with plastic, wrapped himself up, wearing protective clothing, and a mask. Killed with one knife, then dismembered the body, put it in plastic bags, and finally transported it to the sea and dumped the body."

Wang Lan pondered for a while, and said: "Then he needs to buy a lot of plastic sheets, needs an independent house or space, and also buys protective clothing and masks. Besides, our murderer is definitely not a forensic doctor. He used a chainsaw to dismember his body. , the plastic sheeting is easy to puncture..."

"Transportation is needed. In addition, the body bag is too heavy, and one person may not be able to carry it." Jiang Yuan said.

"So, it's possible that multiple people committed the crime?" Wang Lan's eyes lit up.

Jiang Yuan didn't respond to his words, but fell into deep thought.

After a while, Jiang Yuan said slowly: "I think even if there are many people committing crimes, the corpses have already been dismembered like this, why do you need to pack such a big body bag?"

Wang Lan looked up in horror.

Jiang Yuan continued: "If he knows how to sum up experience, it will be much lighter and easier to divide the body into two or even four bags. The stone sinks to the bottom, not the weight of the body itself."

Not only Wang Lan, but everyone present swallowed.

"There are only these four body bags at the scene, so if the crime escalates..." Xiaozhuang took a deep breath.

Jiang Yuan nodded and said: "If the crime escalates, the murderer will probably choose deeper waters and smaller body bags."

"It makes sense." Wang Lan sighed heavily, and said to Xiao Zhuang: "Call the detachment leader and ask them to find the frogman and go into the water to look for it."

……

(End of this chapter)