"Are you a police officer in the precinct?"

I stepped forward and interrupted the conversation.

"Yes."

"How did you find the body? Tell me the details. I asked.

"I was on the night shift yesterday and was in the police station all the time. At about six o'clock in the morning, I did the last patrol of the precinct before the shift was handed over, as was customized. Since this area is a suburb, the area under its jurisdiction is relatively large, and the police force on the night shift is insufficient, so when we patrol at night, we usually patrol the entire area in teams of two. After daybreak, the two of us split up and patrolled half of the precinct alone.

When I arrived here it was about half past six, and because of the special situation in Jing Lane, although the property rights belonged to the residents inside, there were often people walking around, so every time we patrolled here, we would take a look into the alley. Today, as usual, I patrolled here, and as soon as I arrived at the entrance of the alley, I smelled a very strong smell of blood, and habitually looked into the alley, and found that there was a person lying in the alley.

I slowly approached, found blood stains all over the ground, immediately realized that something was wrong, and reported the situation to the office in time through the walkie-talkie, and the station asked me to protect the scene, and they immediately contacted the city criminal police team. "The police in the jurisdiction carefully told me the whole process of finding the body.

It seems that he first found the body, and notified the police station in the jurisdiction, and the criminal police team contacted by the police station in the jurisdiction.

"You just said there's no surveillance around here?" I asked him.

"I mean, there's no surveillance in this alley, but there's surveillance at the left and right intersections outside the alley." The police officer of the jurisdiction explained.

I stood at the entrance of the alley, looking left and right, there was only one passage here, and if you count this alley, it belonged to a small T-junction. Fifty meters to the left and right of the alley are two intersections, and there are traffic violation camera cameras at the intersections.

To enter the alley, you must pass through one of the two intersections.

"There are cameras in the front and back this time, I see how you can hide?!" I muttered a sentence and immediately asked, "Where can I check the surveillance video of the two intersections?" ”

"The terminals of these two cameras are in the monitoring system of the traffic police department, but they are networked with the police station in our jurisdiction, and they can be directly called and viewed at the police station." The police in the jurisdiction said to me seriously.

"Where is your police station?" I asked him.

"Turn right after that intersection." He pointed to the intersection on the left side of the alley.

I followed him on foot to the police station in the jurisdiction, and made a copy of all the surveillance videos of the two intersections from 11 o'clock last night to the present, and when I returned to the scene of the crime, Ren Qiushi had already transported the body back to the forensic department, and the members of the serious crime team were doing the final finishing work.

"Only a high-heeled shoe print was found at the scene, no fingerprints and murder weapons were found, and no body fluids, hair, and other tissues of the murderer were extracted." Jiang Tingbai took off his ultraviolet protective glasses, looking very disappointed.

The murderer committed the crime twice, and there were no traces left at the scene except for shoe prints, which once made him feel devastated, and he wondered if he had not investigated carefully enough, resulting in the omission of some clues.

Today, he lay on the ground almost the whole time, conducting a carpet survey of the scene, and the result was still nothing.

It seems that this murderer seems to be a bit professional.

But I have always believed that there is no perfect crime in the world, and as long as it is done by people, it will definitely leave a trace.

Next, I can only pin my hopes on the surveillance video in my hand.

Once the site is complete, the rest is left to science. Footprint identification, blood tests, and autopsies were being carried out simultaneously, and all of us were sitting in the office of the Crime Unit, hoping to find some clues through the surveillance footage.

On the projector in front of you, the surveillance video screen began to play.

Because this is the illegal shooting and monitoring of the traffic police department, the angle of view is down, and the situation at the entrance of the alley cannot be seen in the video, but it also covers all the intersections.

When the murderer enters the alley, as long as it is not flying and retreating, he will definitely be filmed by the surveillance probe.

Sure enough, the surveillance video showed that at 0:50 a.m. today, Cheng Qi appeared in the surveillance video, and there was a woman who appeared with him.

The woman was wearing a hip-hugging dress, bare-legged and barefoot wearing a pair of high heels, carrying a square bag on one shoulder, and her long hair was draped casually behind her back, looking very hot.

Cheng Qi seemed to be a little uncomfortable, stumbling a little when he walked, showing a drunken state.

His right hand was on the woman's waist, and from time to time he hugged the woman towards him, with a very ambiguous attitude. The woman did not resist, and let Cheng Qi pull, judging from the video, the physical communication between the two was like a couple.

The two appeared in the surveillance probe for less than a minute before disappearing.

It's a pity that the two only left their backs, without any face pictures.

After comparing the two sets of pictures in the Cheng Qi case and the Xie Lun case, and then analyzing the human skeleton and mobile machinery, it can be determined that the murderer of the two homicides is the same person.

At the same time, in the forensic dissection room, Ren Qiushi and Zeng Lan were preparing for further autopsies.

Ren Qiushi stood in front of the autopsy table to give an overview of the physiological characteristics of the deceased, while Zeng Lan stood aside to turn on the recording equipment, and then recorded it with pen and paper.

"The deceased was a male, 28 years old, 1.72 meters tall, weighing 60.5 kilograms, with normal nutrition, no abnormal development, and no obvious restraint injuries, drag injuries and resistance injuries on his body. There were two wounds on the body, one in the front chest, which was fatal, and the other in the lower body, which was a retaliatory blunt blow wound after death. It's 8:10 a.m., and I'm ready to perform the first autopsy, and I'm in the forensic department. Ren Qiushi's face was expressionless, and he outlined the corpse very seriously.

"Recorder, Intern Forensic Assistant in the Forensic Medical Department, Zeng Lan."

After Zeng Lan recorded the details, he added to the video equipment in the dissection room.

Ren Qiushi stepped forward slowly, examined the corpse from head to toe, ran his fingers across the surface of the corpse's skin, and said slowly: "There are no obvious corpse spots on the surface of the deceased's skin, and it has not yet entered the fall period, the skin elasticity is obvious, and the time of death is within six hours. ”

Ren Qiushi's gaze swept over, and finally landed on the wound on the corpse's chest.

"There was a visible wound between the third and fourth ribs on the left side of the deceased's sternum."

Zeng Lan immediately took out a ruler, and after measuring it, he added: "The wound is 3.5 centimeters." ”

Ren Qiushi nodded and continued: "The edge of the wound is neat, and there are signs of tearing on one side of the wound angle, judging that the murder weapon is a single-edged dagger." The deceased had a strong smell of alcohol and had drunk a lot of alcohol before his death, and the specific blood alcohol content was pending the results of blood tests. ”

"The deceased's lower body organs were smashed, and he was repeatedly hit hard with a blunt object, and there was no obvious life reaction, which was a retaliatory blow by the murderer to satisfy his psychological needs after the deceased's death."

Ren Qiushi paused and said, "Conduct the first open chest autopsy." ”

Zeng Lan nodded, put down the notebook in his hand, and took a pair of rib pliers.

Ren Qiushi installed a blade for the planing knife, cut the skin of the deceased's chest, and separated the muscle tissue. Together with Zeng Lan, the costal cartilage was cut, and then the sternum and severed costal cartilage were removed, exposing the pericardium, mediastinum, and lungs.

"There was a small incision less than one centimeter in the left ventricle of the deceased's heart, and the pericardium was stabbed with a sharp blade on the surface of the skin, and the wound on the body surface was larger than the heart wound, causing blood to gush out of the heart wound. In the absence of a pericardial barrier, the blood trapped in the pericardium causes cardiac tamponade, resulting in death, which is an absolutely fatal injury. ”

"The sharp blade pierced the ventricular wall and the ventricular septum, but did not penetrate the entire heart, indicating that the knife was not long, nor did it penetrate too deeply, but only the tip of the knife partially pierced the heart. Judging from the modus operandi and tools of the crime, it was committed by the same person as the previous case. ”

Ren Qiushi froze: "This is a serial murder case. ”