In the office of the Serious Crime Unit, we re-sorted out the clues of this murder case, and focused the investigation on the high-end hotels, bathing centers and other potential underground pornography places that Song Simon cooperated with.

Maybe Jiang Tingbai's online novel script is not wrong, and the murderer is likely to use the identity of a "duck" to disguise, so as to approach Song Simeng and wait for an opportunity to commit the crime.

But what was the murderer's motive? Is it really a professional killer, hired murderer? If it is really commercial malicious competition, will it go too far. Moreover, what's the use of killing Song Simeng? In a large company like this, the business operation is very well-established and will never stop running because of individuals.

"What important documents does Song Simeng have, and the other party does not hesitate to use the method of hiring a murderer?" I pondered for a moment and muttered.

"I don't think it's a good idea for us to investigate like this, the murderer doesn't have much time left for us." Li Meng looked at me and said in a deep voice.

I nodded and asked her, "What do you think?" ”

"I think we should still find Chen Yingying to investigate, the two of them have nothing to talk about, and she will definitely know some key clues." Li Meng said seriously.

"We have investigated the chat records of Song Simeng and Chen Yingying, and all the clues we can get have been obtained. And now Chen Yingying is in an extremely sad mood, her spirit is very unstable, and she has no way to cooperate with us to conduct an in-depth investigation. I frowned, a sad look on my face.

Li Meng didn't speak, as an expert in psychology, she knew this psychological state very well, and she also felt very helpless. After all, this kind of thing is not something that can be done with conventional psychological counseling.

"Perhaps, we should go and meet Chen Yingying." I thought about it for a moment and said lightly.

At this moment, the news came from the alarm reception hall on the first floor, they had just received an alarm call. The content is the same as when Song Simeng was killed, an unfamiliar phone call, a voice changing alarm recording, and a phone number without a real-name system.

"Chen Yingying is dead?!"

After receiving the call to the police, all of us immediately rushed to the scene of the crime, because we had been to Chen Yingying's house before, so this time we were familiar with the road and quickly arrived at the scene of the crime.

Chen Yingying's home, the door was hidden, and the technical team gently opened the door and walked into the living room.

There was a perfume smell that came to my face, this perfume smell was very familiar, and we smelled it once in Song Simeng's house.

Everything was exactly the same as Song Simeng's crime scene, only this time, I also smelled blood.

Walking into the bedroom, I saw a replica of the scene of Song Simeng's crime, Chen Yingying was wearing a white dress exactly the same as when Song Simeng was killed, and she was lying on the bed, as if she was asleep.

The room was full of rose petals for decoration, and Chen Yingying held a red rose in her hand.

It was a fairytale-like picture, but I felt a chill down my spine because there were large blood stains on the bed.

Forensic doctor Ren Qiushi and forensic assistant Zeng Lan walked up to Chen Yingying's bed and carefully examined the source of the blood.

Judging from the current situation, this is a serial murder case, and everything has been carefully arranged, so Chen Yingying's fatal injury must be in the cervical spine.

Ren Qiushi gently raised Chen Yingying's head, and did not find an obvious bone rubbing sensation, nor did he hear a bone rubbing sound, but he found a slender wound.

"Was the murder weapon found at the scene? The murder weapon was supposed to be a single-edged dagger. Ren Qiushi looked at me and asked seriously.

"No murder weapon was found, but treated blood stains were found in the living room." Jiang Tingbai's voice came from the living room.

Even if the blood stains have been treated, they will still leave traces, and for the trace examination department, there is no need to look carefully at all, just using the "biological sample discovery device" in the hand, through different light bands, the blood stains on the living room floor are found.

Judging by the blood stains, there was once a pool of blood in the living room, dripping blood stains all the way into the bedroom.

This shows that Chen Yingying was killed in the living room, and then the murderer moved the body into the bedroom to arrange the crime scene and clean up the traces.

"A fatal knife, the murderer used a single-edged dagger to insert the deceased's cervical vertebrae very accurately, and in the gap between the atlas and the pivotal vertebrae, the central nervous system was damaged." Ren Qiushi said seriously.

"A fatal knife, and it also accurately stabbed into the gap between the cervical vertebrae?! This precision and difficulty is more difficult than twisting the cervical vertebrae of the deceased with his bare hands. Zeng Lan looked at the only wound on Chen Yingying's body and let out an incredulous voice.

"That's right, although the methods of killing are different, the methods of killing are the same, and they all hurt the nerve centers of the deceased. This is a serial murder case, and the murderer is definitely of a professional level, and he knows the bone structure of the human body very well. Ren Qiushi shook his head, his eyes were a little dazed.

He has been practicing medicine for so many years, has experienced countless homicides, dissected countless corpses, and has never encountered such a professional murderer.

The murderer's understanding of the human skeletal structure is no less than that of Ren Qiushi, a professional forensic doctor.

In order to determine whether these two homicides are a serial murder case, it is not possible to draw a conclusion based on the murderer's killing method alone, and a comprehensive judgment must be made based on other clues at the scene of the crime.

"Lao Qin, the scene has been carefully cleaned, there are obvious traces of fingerprint erasure, and there are also obvious traces of rummaging. But the valuables in the deceased's home were not lost, and the murderer was looking for something just like the scene of the crime where Song Simeng was killed. Jiang Tingbai took a deep breath and said to us.

"The murderer is rummaging through something, too?" I was stunned, walked out of the bedroom, and looked at Jiang Tingbai seriously.

Jiang Tingbai nodded vigorously and said in a deep voice: "That's right, just from the perspective of trace inspection, this crime scene has a lot of similarities with Song Simeng's crime scene, this is a serial murder case." ”

After listening to him, I was in a trance for a while, and I felt very puzzled.

"No, the murderer rummaged in Song Simeng's house, and now he has come to Chen Yingying's house to rummage, what is the murderer looking for?" Lin Zifan looked at us in a daze, his eyes full of doubts.

The same way of killing, the same layout of the scene, the same cleaning traces, the same rummaging of items, the same initiative to call the police.

What is the murderer looking for to be important, and he will not hesitate to kill two people?

Most importantly, why did the murderer call the police after the murder?