Xie Jing mistakenly thought that I was talking about the old man's matter, which was the fuse of Zhou Xiaoruo's skinning case. According to Xie Jing's meaning, if this matter is the fuse, it should be Zhou Xiaoruo who wants to kill Zhou Xiaoyu.

"Just listen to me." I said to Xie Jing. I asked the criminal police to continue to put the surveillance video down, a few minutes later, the old man's body was carried out, and after another two hours, Zhou Xiaoyu came out of Zhou Xiaoruo's house, when the two of them came out, they were still nervously looking towards the corridor, and after making sure that the old man's body had been disposed of, they returned to normal.

In the next few days, when Zhou Xiaoruo went home, his eyes would glance at the entrance of the building from time to time, and the rumors of haunting began at that time, so Zhou Xiaoruo was also very afraid. However, after a long time, Zhou Xiaoruo also forgot about this incident, and what happened in the corridor was not discovered at all.

At this time, the criminal police outside told me that the witnesses I wanted had come. I nodded and asked him to bring in the first witness I wanted, who was Zhou Xiaoruo and Zhou Xiaoyu's chemistry teacher. In the eyes of everyone, Zhou Xiaoyu and Zhou Xiaoruo are simply two people.

Zhou Xiaoruo can speak well and study well, so everyone likes him very much, but Zhou Xiaoyu, due to his stuttering and claustrophobic personality, has no other friends except for his cousin Zhou Xiaoruo. I sent people to find out, and everyone also said that Zhou Xiaoyu's study is very poor, but he often likes to paint.

When I learned the news, I immediately thought of the peeling painting in Zhou Xiaoruo's textbook. So I asked people to find out Zhou Xiaoyu's information in more detail. Under inquiry, many people said that Zhou Xiaoruo and Zhou Xiaoyu got along, Zhou Xiaoruo occupied the main position, many things were done by Zhou Xiaoruo, and Zhou Xiaoyu always stood silently behind Zhou Xiaoruo.

It was originally a personality reason, so there was nothing strange about it, but when it was all in tandem, I realized that something was wrong.

After inquiring in more detail, the criminal police finally found a clue, just a week ago, someone found that Zhou Xiaoruo and Zhou Xiaoyu seemed to have quarreled. According to the time they said, I opened the surveillance video of the weekend of that week, and Zhou Xiaoruo did not go to Zhou Xiaoyu's house to play that week.

After that, it was Zhou Guang and his wife who delivered food to Zhou Xiaoruo, but Zhou Xiaoruo didn't open the door.

"We have been thinking that Zhou Xiaoruo was afraid to open the door because he found out that Zhou Guang and his wife participated in Sun Zaiyun's organization, but in fact, we were all wrong." I said. Assuming that this is really the case, Zhou Guang went to find Zhou Xiaoruo for three consecutive days, and Zhou Xiaoruo was so scared that he could choose to tell his parents.

So I boldly speculate that Zhou Xiaoruo didn't dare to open the door because after he quarreled with Zhou Xiaoyu, Zhou Xiaoyu threatened Zhou Xiaoruo, saying that he would tell what happened in the corridor. Zhou Xiaoruo didn't dare to open the door, not because he was afraid of Zhou Guang and his wife, but because he had a ghost in his heart and didn't want to see Zhou Xiaoyu.

"You talk nonsense, you don't have any evidence at all!" After staying at the police station for several days, Zhou Guangguang will speak with evidence.

I smiled: "Who said I don't have proof." After I finished speaking, I turned around and shouted to the criminal police outside the door: "Is the identification result out?" ”

He nodded and handed me a file bag he was holding. Everyone's attention was on the file bag in my hand. Through the gap in the stones of the small pool, we found a human skin, several scalpels, and the identification report contained in this file bag about those two things.

I didn't know the results, so I wasn't 100% sure, so I opened the results and breathed a sigh of relief when I saw the lines on it. The broken human skin was indeed the deceased Zhou Xiaoruo's, and Zhou Xiaoruo's blood stains were also found on those scalpels.

On the scalpel, although there was no fingerprint of Zhou Xiaoyu, Zhou Xiaoyu's DNA was found. Whether it's hair, saliva, or body fluids, human DNA can be detected from it, and with this identification, I am more confident. I handed the appraisal results to Xie Jing, and after he read them, a trace of surprise flashed on his face.

When Zhou Xiaoyu committed the crime, he must have been wearing gloves, so there were no fingerprints on them, but Zhou Xiaoyu was a child after all, and he didn't expect that his body fluids would remain on the scalpel. The small waterhole was too shallow, and he was afraid that someone would find him if he threw the scalpel into the small waterhole, so he buried the scalpel and the human skin in the crevices of the stones.

That mountain is rarely visited, let alone that small pool, it can be said that Zhou Xiaoyu did this foolproof, but he would not have thought that although the chemical elements on the corpse were cleaned up very cleanly, with the current science and technology of the police, the police still found potassium and sulfur in the flesh of the corpse.

Through the element of sulfur and the element of sulfur, we deduced the reason for the high degree of decomposition of the corpse, and it was because of this that I deduced the first crime scene. The crime scene was definitely not the small hill where Zhou Xiaoruo's body was found, because Zhou Xiaoruo's major artery was cut open, leaving a lot of blood, and no matter how much it was cleaned up, the police could not find nothing.

But the first crime scene must be very close to that small hill, because only the vicinity of that place is relatively remote, and it is difficult for the murderer to move Zhou Xiaoruo's body from a distance without being discovered, not to mention that I already suspect Zhou Xiaoyu. The murderer used potassium permanganate and concentrated sulfuric acid to corrode the body, and then used the corresponding method to neutralize the two chemical elements, and then wash them with clean water, so that the police could not find out anything for a long time, so the crime scene needs a lot of water.

So, I asked the criminal police to find a place with a water source near Zhou Xiaoruo's body, and it turned out that there was only a small waterhole in that place. After deciding on the location, we went to take a gamble and it won.

After Zhou Xiaoyu's chemistry teacher was invited in, he didn't say a word, and he felt the heavy and oppressive atmosphere in the office. I walked up to the chemistry teacher and asked him, and he told us that once Zhou Xiaoyu suddenly asked him about the use of two corrosive concentrates, the method of neutralization, the method of cleaning, and the method of wiping off latent fingerprints.

The reason why he remembers it so firmly is because Zhou Xiaoyu is usually taciturn, and he is not good at studying, and rarely communicates with his classmates and teachers.

After the questioning, the chemistry teacher, under the leadership of the criminal police, left here to go next door to make a transcript of the interrogation.

Zhou Xiaoyu still lowered his head and didn't say a word, Zhou Guang and his wife had tears on their faces, and they said vigorously that this was not true.

"That painting, you painted it too." I said to Zhou Xiaoyu.

Zhou Xiaoyu also asked the chemistry teacher about the method of eliminating fingerprints by alcohol wipe, and he has painting skills, so it is likely that Zhou Xiaoyu wiped off his fingerprints and painted something like that. Zhou Xiaoyu and Zhou Xiaoruo were classmates, and it was not difficult for him to clip the painted paintings into Zhou Xiaoruo's textbooks.

"Right?" I asked again.

"That's right!" Xie Jing suddenly roared, Zhou Xiaoyu trembled, and then nodded slowly.

Everyone else was still immersed in shock, and no one thought that this stuttering boy, who looked a little cowering, was really the murderer of the skinning case. Zhou Sheng and his wife looked at the child blankly, and tears kept falling.

A few days before Zhou Xiaoruo's disappearance, Zhou Xiaoyu had already begun to threaten Zhou Xiaoruo, saying that he would tell others what happened in the corridor, so Zhou Xiaoruo was so afraid of Zhou Xiaoyu.

On the day of his disappearance, on the way home for Zhou Xiaoruo, he opened the textbook according to his habit, and found the painting that Zhou Xiaoyu had sandwiched in his textbook in advance, Zhou Xiaoyu felt scared, and the reason why he looked at the corridor so frightened was because Zhou Xiaoyu was hiding in the corridor to scare him, which reminded Zhou Xiaoruo of the rumor that the corridor was haunted.

After I finished analyzing, I asked Zhou Xiaoyu if what I said was wrong, Zhou Xiaoyu's eyes looked at the floor, and he shook his head to show that I was not wrong, and his tears fell to the ground one by one.

"The window in the corridor is not far from the window of Zhou Xiaoruo's room, and then you called him out at the window of the corridor and led him out, right?" I asked.

Zhou Xiaoyu nodded.

"So, what about the book?" Xie Jing asked about one of the biggest doubts in the case.