Jiang Xu drove the car and came to the school again, and the doorman was a little strange to see him coming over so late.

"Doctor Jiang! Why are you still coming to school so late? Those policemen just went back not long ago. ”

Jiang Xu nodded at him, didn't say a word, drove the car directly into the parking lot and stopped, and then walked straight to the back hill of the school.

He stood directly at the place where the female corpse was dug up, and walked around for a long time, sometimes squatting down to look at the flowers on the ground, sometimes looking at the surrounding environment, originally he thought that the murderer was to avenge the female corpse, so if the female corpse was buried here, it was the murderer who killed the female corpse, then if it was for revenge, then the eight classmates were likely to be buried here, as a burial companion to the female corpse, but the entire back mountain was dug up, but the body except for the pregnant female corpse was not dug up.

Jiang Xu is now desperate to find out, what happened to the female corpse before her death?

He squatted down, took a flashlight, and looked carefully around, what he was looking for was a very strange place, maybe more than one, it could be the whole piece, because the back mountain was full of flowers and plants, so it was not troublesome to find, but because the area was large, it would take a long time.

He spread outward little by little from the place where the body was found, and the distance he took out with each step was no more than half a meter, not a single bit, he didn't miss a little, and searched as carefully as possible on every inch of dirt, until the sun gradually rose, Jiang Xu found what he was looking for.

He looked back, it was similar to what he thought, it was not too far from the place where the body was buried, that is to say, this was the scene of the first crime, the murderer was too scared, so he didn't have time to think about how to dispose of the body, so he would bury the body nearby, which was also a big mistake of the murderer, if he took the body away, maybe he would not be able to find the first crime scene here!

At half past five in the morning, he called Su Yang, who was still in the office of the task force, squinted in the office for a while at night, and now just woke up, it happened that Jiang Xu's call came.

"Do you want me to get to school right away?"

As soon as Su Yang answered the phone, he asked excitedly, originally they met at the school gate at 8 o'clock in the morning.

"Come over now, I have some clues here, it just so happens that you are here, I have something to ask you to help with!"

Su Yang was very happy in his heart, because there were many times when Jiang Xu liked to be alone, and he would work hard to sort out the things he couldn't figure out, and rarely took the initiative to seek him to handle the case together like this.

Su Yang washed up briefly, took his coat and hurried out of the door, Yang Wen and the others were still resting in the office, but he didn't wake them up.

Recently, although they are on vacation, everyone has ended their vacation early and returned to work in the task force, and they have not rested for a long time for this case.

When Su Yang came to the school, the doorman felt strange again.

"Why did you come so early, Officer Su?"

Su Yang smiled.

"Nothing, something. ”

After speaking, he drove the car in, parked the car next to Jiang Xu's car, and went directly to the back mountain after getting out of the car, Jiang Xu was still squatting on the ground, his face was pale, and he looked a little tired.

"What did you find?"

Jiang Xu heard Su Yang's words, raised his head to look at him, and then beckoned to him, Su Yang walked up to her and squatted down.

"You see, the flowers and plants here, although they have grown considerably in two or three months, but only this one of the grass grows more messy, as if it has been destroyed by someone, and the color of the soil is also dark, I suspect that this is the first scene where the female corpse was killed, so now we have to collect evidence on the spot and go back to the Forensic Department for testing!"

Su Yang nodded, took out the toolbox, the toolbox had all the tools they needed to collect evidence on the spot, he took out a small shovel, took the soil with the flowers, dug it up in one go, put it into the evidence bag, and then put the evidence into the box.

Jiang Xu reached out and touched the soil, there was nothing strange about it, except that a few of the flowers were a little red compared to the surrounding colors.

Jiang Xu pointed to the flowers, and Su Yang picked up the shovel again, shoveled up the soil with the flowers, and put it in the evidence bag.

"These are the evidence?"

Jiang Xu nodded, then stood up.

"The soil absorbs sunlight, air and water for a long time, which is different from ordinary flat land, although most of the clues on the flat land, after being washed by rain or exposed to the sun, may change, and sometimes disappear, but because the density of the soil is relatively large, it can effectively absorb, so the blood that penetrates into the bottom layer of the soil is easier to be retained, and the color of the soil will be relatively darker. ”

Jiang Xu pointed to the flowers.

"The color of these flowers is slightly redder than the other surrounding flowers, and even if the white flowers are grafted with mutant varieties, it is unlikely that only a few of them are red, so I suspect that the roots of these flowers have also absorbed blood. ”

Su Yang sat down and frowned.

"After the roots of a flower have been stained with blood, will the flowers that grow turn red from white?"

Jiang Xu looked at Su Yang and nodded.

"This flower is called hydrangea, a white variety, many people will classify them as a kind of peony, because they look beautiful, and the color looks very pure, so many school parks, will be hydrangea grafted for decoration, and this flower has a very secret characteristic, that is, the root of the blood after the growth of the flower will emit light red, the more blood the more viscous, the more red the flower grows, of course, these things still have to be taken back for testing, after all, there is no blood penetrating into it, only after checking to know, we should be glad that the murderer is in this land to carry out the murder, if he is on some other flat landAfter all this time, I may not be able to find any clues!"

Su Yang admired Jiang Xu from the bottom of his heart, his spirit was more desperate than his policeman, and compared to his concentration and diligence, Su Yang was ashamed.

After finding these clues, Jiang Xu was a little relieved, and she walked to the parking lot with Su Yang, but he didn't plan to go back.

"I'll go back to the dormitory and sleep for a while, and let me know as soon as the report comes out!"

Su Yang nodded, took the evidence and immediately got into the car and drove away.

Jiang Xu looked at the direction he left and fell into deep thought.

Last night, when he used an ultraviolet lamp to shine on the imprint on the skull, he found two different sets of finger prints, one set of fingers imprinted on both sides of the corpse's head, that is, the two that held the deceased's head and hit the ground, the traces were thin and long, clearly visible, the size of the hand, almost the size of a girl's hand, different from the man's palm print he imagined at first, to his surprise, the palm print left by holding down the female corpse's thigh was a man's palm print, the lines were rough and clear.

From the depth of the palm print, the hand holding the head and the hand holding the thigh, these two actions are synchronized, that is to say, before this girl died, it was possible that while being violated, she was grabbed by her head and hit the ground with her hand, because there were accomplices, all of this coincided with Jiang Xiran's diary. So to make Jiang Xu even more sure, maybe the eight students must have been present, but two of them did it and the others, if he guessed correctly, should be standing beside the corpse and looking at her.

When they found out that the person was dead, they panicked, so they hurriedly buried her!

So none of these eight classmates escaped the punishment of the Avengers.

Jiang Xu shook his head, he never thought that a group of children who should have simply learned knowledge in school would do such a thing.

He went back to the dormitory, lay on the bed and closed his eyes, and when he closed his eyes, somehow, a delicate girl appeared in his mind, her eyes were mournful and long