When they cut open the trachea, they found a small amount of sand in the trachea, visible swelling in both lungs, and that kneading sensation when pressing on the lungs.

At that time, the medical examiner determined that the little girl had died as a result of going into the water.

If the victim died in the water before her death, what the suspect said was true, and did the little girl really jump into the water and drown because of panic?

In order to verify the accuracy of the inference, the forensic doctor specially contacted the Department of Forensic Science of the Criminal Investigation University and invited the most famous professor of forensic science, Zhou Tong.

Professor Zhou Tong is a teacher, and before Moxiu, she told us that she wanted her teacher to do diatom experiments herself.

Diatom testing is used in many developed countries in the West as a very important diagnostic method for drowning or abandoning corpses after death.

Diatoms, are a strange algae.

It is a common single-celled organism in water, some diatoms are small and the cell wall is made up of salts.

It can not only resist strong acid corrosion, but also enter the human circulation and reach all organs of the body through the pulmonary capillaries.

A forensic dissection of the victim's lungs, liver, and kidneys to see if there are diatoms.

If diatoms are found in these organs, it means that the victim still has blood circulation after entering the water.

If a diatom is found, it can be determined that she died in the water.

If no diatoms are found in these organs, it is possible that the body was thrown into the water after death.

In previous autopsies, the medical examiner had cut the lungs, liver, and spleen of the deceased, and had anti-fouling treatments.

After a series of treatments such as high-temperature combustion and strong acid corrosion, the sample is completely carbonized.

Diatoms, on the other hand, are well preserved due to their resistance to high temperatures and protection of cell walls from strong acids.

So, can diatoms be found in the internal organs of the deceased?

Professor Zhou Tong compared the diatoms in the water with the diatoms in the internal organs and found that the types of diatoms in the two were the same.

It can be concluded that the deceased went into the water before his death.

Therefore, the criminal suspect Zhang determined that he did not kill the victim, but he could not escape the punishment of the law because the victim died because of his indecency.

After diatom experiments, a preliminary conclusion was drawn on the case of the female corpse in the pool, and the police preliminarily determined that the victim wanted to quickly escape from the suspect's wrist after molesting him, and ran into the waterhole in a panic.

Perhaps because he was so flustered and nervous that the victim did not grasp his nature and fell into the pool and drowned.

But is it really that simple?

"Professor Zhou, we know that the results of the diatom experiment are out, which can prove that the victim went into the water before he was alive, is it possible that the victim fell into the water after being strangled to death?"

In Professor Zhou Tong's laboratory, I asked the doubts in my heart.

Because if the victim is choked and pushed into the water, even if the victim is on the water, there is nothing the victim can do, how can a person who faints float up from the deep water again?

Professor Zhou shook his head and said to me, "My apprentice can help you answer this question. ”

After that, he looked at Mo Xiu, Mo Xiu and his teacher, and then turned to me and said: "The method you said is untenable, because when Mr. Zhou did the diatom experiment, he found that diatoms appeared in all the organs of the victim, which shows that diatoms are in the victim's body and have a powerful macrocirculatory function." ”

I asked, "What type of cycle is this?" ”

"It is only when a person engages in strenuous activity that blood circulation in the body accelerates, and diatoms can be pushed to various parts of the body, so it can be concluded that the victim was not unconscious at that time," Moxiu told me. ”

This shows that the victim must have experienced a fight when he fell into the water, and was fighting with others?

Such a person who encounters water, in the process of struggling, can easily get out of the trap if he is not trapped by something.

Then why do the living drown in pools?

I suddenly had a terrible thought: "Is there anyone else at the bottom of the pool?" After the victim fell into the water, he hid at the bottom of the pool and grabbed the victim, and then let the victim drown alive in the pool? ”

"It is very likely that because we all ignored one point, the fibers we found by the waterhole did not match the fibers of the suspect Zhang."

That's all Mo Xiu can say.

Professor Zhou Tong nodded, admiring his students, you can see that he is really a capable student, and he is also his pride.

In addition, she deals with a lot of details, and as a girl, it is very rare to be able to calmly approach such a complex case.

Professor Zhou said to us: "Although our forensic science department did not ask about the process of your administrative staff, I still want to give you some advice, this case does not seem to be accidental, it should be a case that has been designed for a long time." ”

"Why do you say that?"

I asked my own question, and Zhou Tong said: "Because everything seems to be too coincidental, like God is destined to be right." ”

Is this really a coincidence?

At this time, Long Hui and the others also returned, and the case on our side entered another stage, and the case on Long Hui's side seemed to be closed.

He said to me with a sad face: "Three of our lost colleagues died miserably, three people were stabbed to death by a branch, and no one thought that they would die like this." ”

Then he showed me the pictures.

I saw the bodies of three colleagues hanging from a tree and felt that something was wrong.

Because the photos of the scene were so tragic that none of the investigators wanted to do a detailed analysis, it was difficult for anyone to accept that their colleague had died in such a tragic way.

I stared at the photo: "Have you found a very important question, since they died in a car accident, how can they fly up the branches with their seatbelts on?" ”

When my question was asked, everyone in the room was terrified.

All eyes were on me.

"Are you saying someone deliberately got them on a tree?"

"I don't rule out that they were thrown into a tree during the accident, but the odds are slim that even if they were thrown, they couldn't have been hung so neatly."

Look at this picture, three people are hung in an equilateral triangle, this kind of hanging is very strange, even if it is hung manually, it will not be so neat.

"But we didn't find any traces of other people's activities at the scene of the crime, and if one person committed such a big murder, it would be impossible to clean up the scene so clean."

Long Hui said.

"If it's not artificial, how can you be sure they haven't borrowed other tools?"

I looked at the photo and it was getting weirder.

It all seemed to be connected, and I suddenly remembered the previous murder, the trajectory of the suspect, which had formed an equilateral triangle shape.

My head suddenly warmed up, and I looked back at the drowning pool and was surprised to see that the shape of the pool was also an equilateral triangle.

I suddenly shouted to them, "All of these phenomena are not isolated cases, this is a serial murder case, all the cases are connected, and the places where they are connected are equilateral triangles." ”

My words surprised all the investigators present.

An equilateral triangle that can explain something, and maybe in their minds, it might really be just a coincidence.

Why did it become a meeting point for a series of cases?

"What do we do next?" They asked me.

"We should change the way we investigate and find the intersection of all these cases, there must be some kind of connection between them."

Looking at the several cases in front of us, the biggest point is that the real murderer has not yet been found.

The murderer in all cases, whether there is really only one person or not, we all held our breath and all eyes were on me.

At this time, Kui Cheng opened the door and entered, and he placed a stack of materials on his desk: "I have been studying the data of these victims for several days, and after investigating, I have found a very important problem. ”

"What was found?"

Kui Cheng glanced at me, and then at Long Hui: "I don't know if you remember, I told you before, did the Five Elements give birth to ghosts?" ”

"Of course, but is this case really related to the Five Elements?"

Long Hui asked, and Kui Cheng said, "I checked the birthdays of these victims and found a very strange phenomenon, do you know what it is?" ”

Everyone was a little confused, but I thought of one thing and said without hesitation: "Do the five elements restrain each other?" ”

"You're right, all the victims were killed by the Five Elements Way."

Everyone opened their mouths wide, it was just a surprising coincidence, all of them died from the Five Elements, and it was clear that it was a serial murder case related to sacrifice.