Chapter 63 Murder in the Secret Room
There is only one possibility that the blood stains do not match. At the moment when the deceased spurted blood, the cabinet door was actually half-open.
Du Yu touched the cabinet door lightly to confirm that it opened from the inside.
And because the blood stains are higher on the right side than on the left, and the cabinet door is opened inwards, we can conclude that the moment the deceased spurted blood, the cabinet door on the left was half open, which caused the blood stains to be mismatched and the right side to be higher than the left. .
Du Yu pushed open the cabinet door with a little more force. There were clothes hanging inside, all stained with splatters of blood.
Blood was splattered inside the closet, but the closet at the scene was closed.
So Xu Yiqing immediately realized that the cabinet door had been moved after the death of the deceased!
He turned around and asked the security guard standing outside the door: "Have you touched the cabinet since you came in and found the body?"
The security guard shook his head repeatedly: "I didn't!"
"The cabinet was closed at that time?"
"Yeah... that's right. I was scared to death. I went to call someone immediately."
"Who found the body with you?"
"It's just me." The security guard almost burst into tears. No one could testify for him: "When the class was about to start, many parents came and said they wanted to talk to the principal about enrollment this fall. Before I came, I saw the principal's car. Downstairs, I think the principal should have arrived, so I asked them to wait in the lobby on the first floor while I came up to ask.”
"When I came up, I found that the office door was locked. I shouted several times but no one answered. I thought the principal had gone out. Just as I was about to leave, I smelled the smell of blood in the office. I felt something was wrong, so I opened the lock with a spare key. ...But when I opened the door, I saw the principal was dead!”
"Have you come in?"
"Just...just a few steps, I looked in and saw the principal's neck being chopped off. I was so scared that I quickly went downstairs to call someone."
Xu Yiqing looked at Du Yu, and Du Yu nodded: "It is consistent with the confessions of the parents downstairs. They said that a few minutes after the security guard went upstairs, he ran down in a hurry, calling for death while running, and pulled them up to see. The parents followed the security guard Come up, it’s like this.”
Xu Yiqing asked again: "Those parents didn't destroy the scene?"
The security guard quickly said: "I still know the common sense of protecting the scene. I only asked them to testify to me that the dead person was dead, and I didn't let them go in."
Xu Yiqing said: "When you first came here, the door was locked?"
The security guard nodded: "Yes, the principal and I have the key. We have weekends off. My key is in the security room."
"Where is the principal's key?"
"It's inside his coat." Du Yu waved his hand, and the police officer from the Investigation Division took the key put into the evidence bag and showed it to Xu Yiqing: "The deceased's coat was also on the ground at that time. After investigation, we found something inside the coat. The key.”
The interior is locked and the door can only be opened with a key.
The deceased's key is in the house, and the security guard's key is in the security room. There are surveillance cameras in the lobby and security room on the first floor, which can prove that the key has been in the security room since the security guard got off work last Friday, and no one has touched it.
It was a very typical secret room. Xu Yiqing now understood where Du Yu's headache was.
He looked at the deceased who was lying in a pool of blood with pale corpse spots starting to appear on his face, then looked up at the three very eye-catching words "I'm guilty" on the wall, and sighed.
"Take the body back to the forensic department and prepare for the autopsy."
Xu Yiqing could only hope to learn more clues from the autopsy report.
It's just that God doesn't fulfill people's wishes.
There was only one fatal injury. Apart from that, there were only some bruises on the buttocks and elbows of the deceased, and no other injuries could be found.
The deceased's trachea and carotid artery were cut open with a knife, and he fell to the ground with his buttocks and elbows first. He struggled for only a few seconds before losing consciousness and died of excessive blood loss.
The time of death can be pinpointed as around 9am on Sunday.
Criminal Police Brigade Office.
Du Yu looked at the shortest autopsy report in recent times in his hand, feeling uncomfortable because he was unable to do anything.
The shorter the autopsy report, the less useful Xu Yiqing can be, which is not a good thing for the crime team.
Lin Sheng stayed in the forensic department, and his replacement became Zhou Shi. She was obviously better at analyzing the case.
Xu Yiqing asked: "What should we do now?"
Du Yu said: "I have asked people to visit the family members of the deceased. In addition, the parents who temporarily called the police station are also taking notes...The other good news is that the lobby and security room of the No. 4 Middle School Administration Building are under surveillance. I see After passing by, we were able to take pictures of the only entrance and exit of the building. All the windows were equipped with anti-theft windows. The murderer must have entered and left through the main entrance. There was surveillance, and everyone who entered and exited was checked one by one. "
Zhou Shi said: "While waiting for surveillance, I feel it is necessary to interrogate the person who reported the crime on Saturday again."
In the interrogation room of the Criminal Police Brigade, the young mentally ill man was still handcuffed, and this time he was handcuffed directly to the table.
Du Yu sat in front of him with sharp eyes: "Tell me, who is the accomplice?" He called the police on Saturday and reported that he had killed someone, but that person was really dead on Monday.
During this period, the suspect had been locked up in the police station and there was no way he could escape to commit murder, so Du Yu concluded that he must have an accomplice.
That is, an accomplice.
Therefore, the three members of the task force present immediately understood that the [Cleaner] who had been silent for several months had started to take action again.
Why is he the principal of a junior high school this time?
And you want to help the mentally ill person in front of you?
The suspect was not afraid at all, with an excited expression on his face: "He...he is dead, I will kill him! He, he, he deserves to die!"
"Bang!"
There was a muffled sound, and Du Yu hit his fist on the table, startling the suspect.
This kind of deterrence is necessary, and psychological oppression will make the suspect collapse earlier.
But obviously this method is not very effective for suspects with mental problems.
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He was just frightened, but not afraid at all. The excitement in his eyes gradually turned into madness: "Police, I surrender. In addition to killing... the principal, I also killed others!"
Du Yu gritted his teeth: "Just stop it! Don't think I dare not take action!"
Zhou Shi also thinks that giving such a person a beating might be more useful.
Xu Yiqing frowned and asked: "Who else did you kill?"
The suspect's excited expression suddenly disappeared, and he fell into painful memories, beating his head: "He... what is his name?"
After a while, he suddenly realized and shouted: "I remember! His name...is Song Lang!"
So Du Yu asked the police to quickly investigate this person named Song Lang. Because he was not as pointed as the principal of No. 4 Middle School, he thought it would take some time to find this person.
But unexpectedly, it only took less than a minute for the police to find this person.
He only entered the name in the file system and filtered it, and then he had the other party's information.
So obviously, this guy has a criminal record.
Du Yu found Xu Yiqing and sighed heavily: "It's become troublesome again."
Xu Yiqing said: "Let me guess, this person is not dead yet."
Du Yu nodded: "Not only is he not dead, he is also an acquaintance."
"Acquaintance?"
"Both you and I, Zhou Shi, have seen Song Lang nicknamed Little Wolf... Li Dusheng's horse boy."
Xu Yiqing suddenly realized that it was the nightclub owner.
"Then he is in danger now."
"I have sent someone to notify him." Du Yu said, "I will set up defenses if necessary. I have a hunch that maybe this time is a good opportunity to catch [the cleaner]."
"Why did the [cleaner] help a mentally ill man who killed the principal of No. 4 Middle School and Li Dusheng? There must be some connection between the two people." Xu Yiqing pondered: "It doesn't seem like the [cleaner] would kill innocent people indiscriminately, and she said I will be the next one to kill.”
"How can you expect to die?" Du Yu patted Xu Yiqing's shoulder: "Don't worry, Old Xu, you can't die as long as I'm here. I have to catch her even if I risk my life. In the worst case, Responsibility, speaking personally, I owe you a lot.”
Soon the surveillance of the administration building of No. 4 Middle School was taken back by the field police. Let’s not talk about Song Lang’s control. Du Yu had to finish the case of the murder of the principal of No. 4 Middle School today.
It's just that the three members of the task force and the technicians from the investigation department watched the surveillance in sections to speed up efficiency. It was almost evening, and the atmosphere became more and more dull as they watched.
Until the last person witnessed the end of the video on the screen, everyone looked at me and me and shook their heads.
No one!
From get off work on Friday to work on Monday, only the principal himself came to the school to work overtime at 8:30 a.m. on Sunday.
Apart from this, no one has ever entered or exited the lobby of the administrative building!
How did the murderer kill the principal of No. 4 Middle School in a secret room at nine o'clock on Sunday morning and then disappear quietly?
(End of chapter)