Forensic doctor: I only love dissecting corpses and idolizing Hannibal

Chapter 75 Time Competition (please subscribe, fourth update)

The scene is another villa, the same technique, the same surveillance but no picture, the same party and so on.

This time, it was another woman who died, but judging from the blood at the scene, the woman had definitely not been dead for more than eight hours.

This is a very scary thing.

Is this guy crazy?

Captain Li and Lao Huang exchanged glances and said, “The old way, right?”

“Well, the old method is to contact nearby properties, high-end properties, and inform these owners to be careful, and be more careful yourself. Captain Li

said: “This guy is a little anxious. It feels like he is saying that he is anxious to kill people or something.” ”

Old Huang said: “We agree. This guy is very anxious to commit crimes. Well, he should be a newcomer, but he has learned a few things, not much, and can’t restrain himself. ”

Chen Fan took photos at the scene with a smile.

Photography and survey are all basic tasks. These people will be needed for subsequent meetings.。

“Taking human blood as an example, adult blood accounts for about one-third of the body weight, has a relative density of 1.050 to 1.060, a pH of 7.3 to 7.4, and an osmotic pressure of 303.7 millimoles per liter. ABO blood type is the main blood type classification of humans, which can be divided into A, B, AB and O types. There are also blood type systems such as Rh type system, MNS blood type system, and P blood type system. In addition, humans also have a lymphatic circulation system, which is related to blood and tissue fluid. The circulatory fluid of earthworms is called hemolymph. ”

Xiaoxiao said: “How to make a preliminary estimate of the blood volume here? Chen

Fan said: “There is no other way. Practice makes perfect. Look and record. If you can measure fluids with your eyes, you can do it. Can you?””

“I know a little bit, but it’s a bit difficult for me to actually operate.。”

“You are really stupid. Didn’t this thing just come from the beginning? ”

She’s numb, really numb. Xiaoxiao is tired of her teacher’s pretentiousness.

Every ordinary conversation that Chen Fan said is a thorn in her, stimulating her, making this person herself also a student. Ba Xiaoxiao was deeply affected.

When the blood loss of an adult is 500 ml, there may be no obvious symptoms. When the blood loss is more than 800 ml, the complexion and lips will be pale, the skin will sweat, and the hands and feet will be cold, Symptoms such as weakness, shortness of breath, fast and weak pulse

。When the blood loss reaches more than 1,500 ml, it can cause insufficient blood supply to the brain, and the injured will experience symptoms such as blurred vision, thirst, dizziness, confusion or restlessness, and even coma. Losing too much blood is a devastating blow to us. Blood is not only of great significance to the living, but also to the dead. The traces left by blood at crime scenes are the most powerful evidence. Blood stains have many classifications.

There are many categories, and different categories have different branches.

It can be said that it is possible to separate blood analysis into a subject.

There are also bloodthirsty forensic doctors made for this in foreign countries, and there are special TV series about blood tests and bone tests.

The longer forensic and anthropological research goes, the more you will find that you have only touched the tip of the iceberg.

Chen Fan squatted on the ground and inspected the scratches.

Then he took a white pen and paper and began to calculate.

According to the movement of turning the head, it started to move backward.

Then he stared at the position behind him, lying on the ground and observing the ground carefully.

There are footprints, not very clear, but you can see there is not much dust。

“Come on powder, come on. Xiaoxiao

opened her toolbox, gave it to Chen Fan, and said, “Teacher, what are the things in your toolbox?””

“You can go and see it yourself, I don’t have the password. ”

I opened Chen Fan’s toolbox.

There were needles and threads for sewing, a hammer, a hand saw, and knives. Most of all, I was speechless when I found a kitchen knife.。

“Teacher, what are these things for you? ”

Chen Fan said: “If you encounter a stuck corpse, this knife can be used to chop it down directly and make it easier to handle. However, it is a pity that it is not used at ordinary times and can only be used to cut meat at home.。”

“You use a kitchen knife for cutting pork to dispose of the body? ”

You just get used to it. In a poor place, there are not so many things to pay attention to. It is normal for the eating basin to collect some blood and so on.

Xiaoxiao’s nerves told himself that he was going to vomit in disgust, but he just couldn’t vomit.

Chen Fan took the initiative Footprints, said: “Here you go, I don’t know the footprints for the time being. ”

Liu Xi looked at it and said, “Well, he is about 1.78 meters tall and weighs 150 pounds. He is a bit burly and has no characteristics. It is difficult to deal with.

Captain Li said: “It’s over, fuck it. ” ”

Xiaoxiao widened his eyes and looked at the people around him.

What do you mean?

Captain Li said: “Well, if this person’s feet are uneven or something, it can be used as a point. If this person is overweight, it can also be used as a point. Even this It doesn’t matter whether a person is ugly or not, but what scares the most are ordinary people without any special characteristics.

Chen Fan said: “Do you think someone who is 1.78 meters tall is an ordinary person? ” ”

Okay.

Captain Li said: “It’s really not ordinary, but there are a lot of people. Now the children are all very tall, okay? The one in my family was 1.7 meters tall when he was in elementary school. ”

Chen Fan was speechless, it seemed like it was true.

He smiled and said, “Isn’t it true that the cost of crime is very high? Captain Li

was startled and said, “You are really Chen Fan’s apprentice. How did you come up with the idea of committing a crime?””

“I just think about it, it’s nothing. ”

Captain Li said: “The cost of crime itself is very high. It doesn’t work if you are fat, ugly, handsome, too thin, feet too big, and arms are different. It doesn’t matter whether it’s long or short, and it doesn’t matter if the body parts are spit out. Chen

Fan said: “By the way, it won’t work for those with kidney deficiency, those with prostate problems, and those with special hobbies.” ”

What the hell.”

The people watching the excitement were dumbfounded. It was too scary.

In fact, there was another reason why these people were not driven away. The murderers were used to returning to the scene to observe.

It is a pity that Captain Li He Laohuang doesn’t have that ability, so he can only rely on forensic doctors.

At least now he has found some footprints, which is useful.

But Chen Fan doesn’t care about the footprints and doesn’t understand. Chen Fan won’t talk nonsense and just studies his own. Blood stain.

By observing the shape of the blood drop, the height of the blood drop can be roughly determined. This can further infer the position, body position and wound height of the subject who dropped the blood drop. Experimental data shows that due to the effect of gravity, from a height within 10 The droplet of blood dropped at a contact angle of 90° is in the shape of a round drop. The edge of the round droplet is smooth or slightly with small protrusions. The blood droplet dropped from a height of 50° and a contact angle of 90° has more small protrusions on its periphery. When the same amount of blood falls, it is in the shape of a round drop. The longer the distance to the object (from 50 to 10), the larger the blood drop formed. The more small protrusions around the blood drop, but after the distance exceeds 100, the shape of the dripping blood stain at a contact angle of 90 degrees will basically no longer change. After the blood hits the ground, many smaller blood droplets will be formed around the large blood droplet due to the splash effect. On the paper,

the data returned by Chen Fan in seconds is recorded.

He took out the flashlight and shined it on a point. , very quickly, an area was found。

“Here, wipe it and go back for a DNA test.。”

“OK ”

Xiaoxiao still knows these basic operations very well.

Chen Fan stood in the position of the murderer and look

[ Read more novels by visiting our website: Knight Novels ] ed at the back of the woman on the ground slowly crawling forward.。

“The first cut was on the back. This man struck very hard and cut the woman directly on the back to the ground.。”

“He was not in a hurry to kill this man, but slowly watched the woman crawl forward.。”

“The woman died after losing too much blood.

Captain Li said: “Have you investigated the relationship between these two families? ” Chen Fan said, ”

No investigation?” You take samples and send them to the forensic laboratory. ”

Ah, isn’t this what your forensic doctors did?

Chen Fan was speechless and said: “Brother, we are forensic doctors, not gods. Water investigation, why investigation, it is your business, right? You are a criminal investigation, you did not order, we go What are you doing this for? The scene alone is enough to keep us busy. Captain Li

was speechless and said, “Sorry, I’m used to it. You give me a report and I’ll arrest people directly.” (To read Baoshuang novels, go to Feilu Novel Network!)

Chen Fan was speechless and said: “Even if you expect my report to solve the case, you have to take the initiative to do things. I am really convinced. You are really stupid.” ah. ”

Lao Huang hurriedly stepped away and went to take samples.

Everyone ignored one point, why the dog didn’t bark, and the corpse was specially arranged like this. What on earth did this person plan to do? But this thinking is a criminal

investigation The matter has nothing to do with forensics.

Chen Fan just tried his best to restore the scene. This is what Chen Fan needs to do.

This person planned to take the body away. Unfortunately, this person was the first to achieve complete protection, but the second I couldn’t do it.

Maybe he was too excited, or he wanted to commit a crime too much.

These are all possible, this guy is very anxious.

Lao Huang and Captain Li got a terrifying answer, even in a short time Commit a second crime.

Damn, something’s wrong.。

“Call me, it’s embarrassing, but calling is the safest option. ”

Captain Li quickly called Song Ming and sent some photos.

Now there is no need to care about face. Solving the case is the most important thing to do.

According to the characteristics and distribution pattern of the splattered blood , .It can analyze the killing action and reproduce the fighting situation. The tip of the blood spatter ejected from the arterial blood vessel is the spray direction, which can roughly reflect the direction of the movement during the murder. There is a large amount of blood spatter on the scene, especially those that exceed the height of the human body. The distribution of blood spatter reflects the process of fierce fighting. It can then be analyzed to see whether there is a great disparity in strength between the two opposing parties. This provides a basis for the analysis of the number of perpetrators. Due to the different heights of the subjects (hands, tools, etc.) that form the blood spatter and the objects that bear

them The distance between them is different, and the direction, angle, and strength of the splash are different, resulting in different shapes. Whether it

is a macroscopic view of a group of spattered blood or a microscopic view of each spattered blood point: the blood stains are mostly in the shape of an exclamation mark. The tip indicates the direction of the splash. The greater the force of the splash, the smaller the angle between the splash direction and the plane of the object. The tip of the exclamation mark formed will be thinner and longer. And due to the effect of gravity, each splash blood point will leave the formation When the subject reaches the receiving object, all the trajectories it passes are a parabola. Then in turn, by analyzing and calculating the parabolic motion trajectory of the blood spatter and each blood point, the criminal action that formed the blood stain can be reproduced.

Experiment In the room, Chen Fan held a knife made of paper in his hand, looked at the woman in front of him, and said, “How tall are you?”

“1.65 meters, teacher, it would be rude if you ask again.。”

“No, find a woman, 1.68 meters tall. ”

The girl ran out and found a policeman.

The policewoman felt a little sick when she entered the room. She suppressed her nausea and said, “What do you need me to do?”

Chen Fan said, “Now I will start to chop you, and then you will fall directly to the ground. Remember, this knife will cut into your back and your body. ”

The policewoman nodded.

Chen Fan slashed with the paper knife.

The policewoman fell to the ground with an ouch.

Chen Fan stared at the ground and said: “Something’s wrong…no, this isn’t right. The

policewoman was speechless. I’m not a professional. What should I do?

Chen Fan handed the paper knife to Zi Rui and said, “You are 1.78 meters tall, right?””

“I’m 1.8 meters tall。”

“Don’t lie. ”

Zi Rui nodded.。

“Remember, when you chop me down, you are going to kill me. You must be strong, do you understand?”

“clear. ”

The paper knife struck up. Chen Fan felt the strength, estimated the weight and volume of the deceased, and threw himself forward. Then he looked back at

the person, and then tried to get up, but he had no strength.

Then he continued to walk forward. .

Then, Chen Fan stood up and stared at the white dust on his body.

He felt a little bit.

He came in front of the deceased and began to piece together the body.。

“I have never exercised, but my upper limb strength is relatively strong and my lower limb strength is average.……”

The report is written in。

“The wrist is flexible.

Captain Li ran over here and said, “Song Ming’s call. ”

Chen Fan answered the call and said, “What’s the matter? ” ”

You missed me, hahaha. Do you think that without our reasoning, the case will progress very slowly?”

“Feel free, I am a forensic scientist, this is my responsibility, the speed of progress of the case has nothing to do with me. ”

Looking at him with a smile and admiration, the indifferent Chen Fan is so handsome. These words he said were as cold as a machine.。

“Say your report. ”

Chen Fan told Song Ming the things. Song Ming thought about it and said, “I should be able to play basketball. I have this habit. I think my arms are strong because I have carried things for a long time. It may be. I thought of it. , people who help people pick up couriers and deliver goods can have upper limb strength but average lower limb strength. ”

Chen Fan didn’t say anything. Captain Li started to think about it and said: I know that supermarket delivery people will deliver things to some people in the community and help with express delivery. They earn a lot of salary per month, but there are many supermarkets. How can I find them? ?

Song Ming continued: Those who killed were all peripheral women. This boy was a bit handsome. This high-end community was still a villa. The boy was working for something. Wasn’t he just eating soft food? He was used to showing off himself. The muscles are chest muscles, you can just look at those who are used to wearing tight short-sleeves.

Captain Li said: “Why?”

“Fitness and leg training require a lot of perseverance. How can someone with such perseverance work as a delivery person? Will there be a difference in money? It’s nothing more than push-ups on my own, just a symbolic practice. I have ideas and actions, but not much, and I can persist. Young people, between the ages of twenty-three and twenty-five. ”

Captain Li instantly knew the direction clearly and led people to arrest him directly.。

“Chen Fan, do you want to team up with the three of us? Really, if you team up with the three of us, many cases will come to you. They are all big cases and important cases.。”

“No, I think I am very good at studying my forensics. Bloodstain research is very interesting. Moreover, there may be many murder cases, but every case is equal and others need me. Song

Ming fell silent and said, “You really are…I’m convinced, you’re awesome.”

Chen Fan said: “It’s okay, but I will deal with it if you meet it. If you don’t meet it, I will find it. If you don’t have fate, it has nothing to do with me. ” ”

Xiaoxiao said: “Huh? Master, why does it sound like the conversation of a scumbag? Song

Ming said with a smile on the phone video: “Hahahaha, your master is a scumbag.” ”

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