Since the establishment of the Serious Crime Unit, all major and important cases have been solved, and the process of solving each case has been very difficult.

The murderer's motives for killing are strange, and the clues that the crime scene can give us are almost zero.

But in this case, we suddenly felt a little uncomfortable in the face of many clues.

"It was a heavy rainstorm that night, and the door was not closed, could it be that the soot was blown away by the wind and scattered in the corner of the wall, and was not found?" Li Meng muttered.

Lin Zifan smiled slightly and quipped: "You don't trust the old dog." ”

As soon as Lin Zifan's words fell, Jiang Tingbai's voice came from the door: "Who doesn't trust me?!" ”

Jiang Tingbai's appearance in the office of the serious crime team at this time means that he has completed the trace examination.

I hurriedly beckoned him to sit down and join us in our analysis of the case: "No one doesn't trust you, did you find cigarette ash at the scene?" ”

"Soot?" Jiang Tingbai frowned suddenly, looked at us in a daze, and slowly shook his head: "I didn't see it, this matter is also something I am particularly curious about." Cigarette butts were found at the scene, but no ash, and alcohol was smelled at the scene, but no bottles were found. ”

"So, the murderer came to the scene of the crime after drinking?" Lin Zifan let out a question.

Jiang Tingbai nodded silently, and then changed his words and told us about the results of this trace examination: "The fingerprints on the fruit knife of the murder weapon have been collected, and there is only one person's fingerprints, and the bloody footprints at the scene are relatively complete. The cigarette butts have already been handed over to the laboratory, but it will take a few hours for the DNA report to be issued. ”

"Are there any other clues at the scene of the crime?" I asked.

"In addition to the bloody footprints, there are some other footprints at the scene, which are very badly covered and messy. Covered in blood, there is no way to collect valuable footprints. Jiang Tingbai made another very crucial discovery.

His discovery coincides with what we have just discussed, that is, more than one person entered the scene of the crime in the hours leading up to the crime.

"Gangs?" Li Meng suddenly frowned and asked seriously.

Jiang Tingbai shook his head and denied the possibility of the gang committing the crime: "These footprints did not appear at the scene of the crime at the same time, otherwise they would not have been covered so seriously. The process should be in such a sequence that the footprints appear first, then the footprints are covered by the blood of the deceased, and then the bloody footprints left by the person on the blood. ”

"It seems that these people entered the scene of the crime in order, so there is only one murderer, and the person who called the police is Bai Chuyun, the sister of the deceased, Bai Chuyun did not enter the bedroom where the crime occurred, but reported to the police directly after discovering that his sister died. So on the night of the crime, there were three groups of people at Bai Chuyue's house, the murderer was in the second group, and Bai Chuyue was the third group. Li Meng immediately figured out the logic and carefully sorted out the entire case.

"In this way, only the bloody footprints and fingerprints on the murder weapon can confirm that the murderer's, and the cigarette butt is likely to have been left by the first person who came to the deceased's house that night." Lin Zifan said in a deep voice.

"But why is there no soot?" Xue Hang said seriously.

Although a lot of clues have been sorted out, it has become very suspicious who left this cigarette butt without ash and why it appeared at the scene of the crime.

I looked at the time, and it was already half past eleven at night, and we had received the report at 10:15 p.m. and went to the scene of the crime.

By this time, the heavy rain outside the window had basically stopped, and gusts of cold wind blew into the house, bringing the fragrance of the earth and driving away the summer heat.

At the same time, it also drove away our sleepiness.

I slowly stood up and stretched widely: "I'll go to the forensic department." ”

In the autopsy room of the forensic department, Ren Qiushi and Zeng Lan were conducting autopsies overnight.

The autopsy was almost completed, but after the murder weapon was brought back, the fruit knife found at the scene, it was first handed over to the trace examination department for fingerprint collection, and it was just sent to the forensic department.

Adhering to the serious and rigorous autopsy, not letting go of any detail, Ren Qiushi still made a seemingly meaningless comparison between the fruit knife and the stab wound on the deceased's body.

When I walked into the dissection room, I saw the bloody side.

Although I have been a police officer for nearly eight years, and I have been living in the Public Security Division for five years, I have experienced many homicides and seen corpses, and I have seen all kinds of corpses.

But I still feel some physical discomfort, and I am not completely numb as Ren Qiushi said.

Ren Qiushi was busy standing in front of the dissection table in his dissection suit, he looked up at me slightly, and then lowered his head and continued to work.

"No......" Ren Qiushi suddenly muttered.

Zeng Lan has also been working beside Ren Qiushi, she also felt very puzzled about this, and said in a deep voice: "The death time of the deceased will not exceed two hours, even if the muscles will spasm and contract, and the formation of corpse stiffness, it will not be so bad." ”

Ren Qiushi repeatedly looked at the fruit knife in his hand, as well as the more than ten stab wounds in the deceased's chest and abdomen, and said seriously: "Although there will be deviations, why is there no deviation at all in this trauma?" ”

"So, there are two murder weapons!" Zeng Lan suddenly raised his voice and let out an unbelievable voice.

"It's very likely, but only this one murder weapon was found at the scene of the crime, which is so strange. In terms of the shape and depth of the wounds, the two murder weapons are single-edged daggers, and if the murderer wants to kill, there is no need to use two single-edged daggers to commit murder, right? And in the process of committing the murder, the dagger was also exchanged? It is even more unlikely that the murderer will take a dagger after killing and leave a dagger......"

Ren Qiushi slowly put down the fruit knife in his hand, stared at the wound on the deceased in front of him, and fell into deep thought.

I stood from afar, watching Ren Qiushi and Zeng Lan's reactions, knowing that they must have discovered something suspicious through an autopsy.

I walked up quickly, and in order not to disturb their work, I still kept a certain distance from them: "What? What suspicions were found? ”

Ren Qiushi shook his head slowly, as if he hadn't heard me, and had been thinking about it.

He pondered for a long time before slowly raising his head and looking at me earnestly.

Although he was looking at us, his mind was still thinking, so that his eyes were a little hollow.

After being silent for a while, he slowly came back to his senses and said to Zeng Lan beside him, "You should send these biological samples for testing first." ”

"Okay." Zeng Lan nodded, walked to the workbench on the side, took off her disposable rubber gloves and threw them into the trash, washed her hands, took off her dissection gown, and walked out of the dissection room with biological samples.