This is a small apartment, only more than 20 square meters, one room, one kitchen and one bathroom, the deceased is tied hand and foot behind his back, bare-chested, lying on the ground with his face up, a large towel stuffed in his mouth, and three knives stuck in his stomach.

Duhrin preliminarily determined that the deceased had been stabbed three times in the abdomen, one in the stomach, one in the liver, and the other in the intestines, and that the three stab wounds had caused massive bleeding, resulting in hemorrhagic shock and then death.

The deceased's name was Zhou Peihao, 26 years old, who was working as a planner in the marketing department of a nearby electrical appliance mall. Wen Man, the deceased's girlfriend, was also an employee of the electrical appliance mall, and at noon she called the deceased for dinner, but no one answered the phone, and asked the deceased's colleagues in the department to learn that the deceased had not gone to work this morning, and his punch-in record could not be found on the access control.

Wen Man was worried that his boyfriend was sick, so he came to Zhou Peihao's rented apartment to check the situation, knocked on the door and didn't open, so he called again, and he could hear the mobile phone ringing in the apartment, but no one answered.

When Li Xian and others arrived at the scene, the door was locked inside, and when the technical unlocking was ineffective, Li Xian and others had no choice but to use violence to break the door and open the door.

When I opened the door, I was inside.

The structure of the room is very simple, the entrance door is a small corridor, there are two doors on the left side of the corridor, which are the kitchen and bathroom, and then there is the bedroom of this room, the location of the body is at the junction of the small corridor and the bedroom, the bedroom has a double bed, a small table, a wardrobe, and some other small furniture, the room furnishings are very simple, and it is also very clean.

There is only one window facing the door in the room, and the window is open, which makes the criminal police suspicious, because the season is late autumn at this time, although it is not particularly cold, but the window still needs to be closed when sleeping at night, and now the window is open, then there are only two possibilities, one is that the deceased has not yet reached the time to rest before being controlled and killed by the murderer, and there is no need to close the window, and the other is that the murderer did it intentionally.

Du Lin leaned on the window and looked down, this building is an apartment building, rented and sold to single white-collar workers like the deceased or newlyweds without children, the whole building is 30 stories high, and the room where the crime occurred is located on the 22nd floor.

As for whether the murderer left from the window, it can be basically ruled out, because in order to prevent someone from falling from the building, all the windows of this building are designed to open and close up and down, and the window can only be opened at most 20 centimeters, and the width of the entire window is only more than 30 centimeters, which basically eliminates the possibility of jumping off the building (the law stipulates that if someone jumps off a building, and the place of the jump is not the deceased's own property rights, the manager of the property or building must compensate the family for economic losses, and you can go to see the high-rise hotel where you live, and the window of the room can't even stick out of the head) 。

The windows are narrow, the doors are locked, and there are no other entrances and exits, and the murder scene has become a "secret room", which is a typical "closed room murder incident".

While everyone was not looking, Durin quietly walked into the bathroom, put the blood stains on the disposable gloves into his mouth, and read the last image of the deceased before his death. Since more than ten hours had passed since the time of death, the illusion had begun to fragment, and Durin only saw a few small fragments of him before he died, and did not see the appearance of the murderer. Several fragments are linked, and the approximate situation is: the deceased saw that there were several ropes in the house...... A man went out through the door and closed the door...... The deceased was lying on his back on the ground, directly above a lamp, under which there were several sharp knives with blades rushing down...... One of the knives suddenly fell and stabbed him in the abdomen, and he tried to struggle, but his body did not obey him, and he could only watch as the other two knives also fell, stabbing him in two other places in the abdomen.

As for why he didn't listen to the call, Du Lin knew in his heart, but it was not yet possible to say that Du Lin was interested in how those three knives suddenly fell from the sky?

He walked out of the bathroom and looked up at the light above the body.

"What's the matter, old Du?" Li Xian asked when he saw Du Lin looking over his head when he came out of the bathroom.

"Is there a ladder?" asked Doolin rhetorically.

"Yes, there is a set on the car that pulls the equipment, and I have someone bring it up. After speaking, Li Xian ordered into the walkie-talkie.

A few minutes later, a folding ladder was sent up, and while waiting for the ladder, Du Lin put the deceased who had completed the on-site examination into a body bag, and let a few policemen carry it to the waiting car downstairs, and sent it directly back to the coroner's examination room of the criminal police team, where Ji Ruoming conducted a preliminary autopsy, and the blood sample was sent to the hemolysis clinic, where Zhuang Poshi underwent a toxicology test.

Du Lin opened the folding ladder and placed it under the lamp, climbed the ladder in a few steps, carefully observed the lamp, and after looking at it for a while, he jumped down and let Li Xian go up to see it.

"Look at the position of the metal pole where the lampholder is connected to the lampshade. ”

Li Xian looked at it according to his words, and sure enough, he saw something strange, it was originally a piece of dust, but now, a long strip of marks appeared on the dust, as if it was left after being scratched by something like a rope, and the direction of the trace was that one end was facing the door, and the other end was facing the window.

After seeing this clearly, Li Xian did not rush down, but observed the other parts of the lampholder.

"Lao Du, the part connected to the ceiling of the lampholder has signs of loosening, and it seems that it has also been formed recently, give me the camera, and I will take a picture. Li Xian stretched out his hand to Du Lin to ask for a camera, and Du Lin hurriedly asked the policeman next to him who was taking pictures in other places to collect evidence, and handed it to Li Xian.

Li Xian took out two yellow label papers with numbers and rulers from his pocket, glued them next to the dust marks and the loose position of the lamp base, and then took a few photos from different angles (knowledge points: if you want to go to court to make evidence, you must have this kind of label), threw the camera to Du Lin, and walked down the ladder in a few steps.

The two of them followed the point of the mark to the window.

Sure enough, there are also fresh traces of scratches by the rope at the window, but not one, but three!

"Three knives...... Three ropes ...... "Du Lin seems to be talking to himself, but he is actually reminding Li Xian, otherwise how can he tell Li Xian the illusion he saw in the blood of the deceased?