If this is a serial murder case, then the direction of the investigation that we have determined is going to change.

"The murderer must have not found what he needed in Song Simeng's house, so he killed Chen Yingying and rummaged through Chen Yingying's house." Xue Hang said in a deep voice.

"Song Simeng and Chen Yingying are best friends, but they are not in the same job. Therefore, the nature of the case can exclude hired homicide caused by commercial competition. I nodded, lost in thought.

Because, not only this one clue, but also other clues that we have analyzed, will also be overturned.

"The murderer not only knows Song Simeng, but also knows Chen Yingying. More than 90 percent of the burglaries and murders were committed by acquaintances. "Lin Zifan looked at us and felt unprecedentedly confused about this case.

Now our thoughts have not been cleared, so we feel lost.

What we are doing now is to carefully sort out these clues and find the clues that we need that are useful for the case.

I stood by the wall, pressed my fingertips to my temples, and muttered, "If it was an acquaintance who committed the crime, the murderer couldn't be a 'duck', that is, a 'little milk dog' in their mouth." Because Song Simeng had just been killed by a 'little milk dog', it was impossible for Chen Yingying to let a 'little milk dog' come to the door. ”

"The murderer and Chen Yingying are old acquaintances, but they have just met Song Simeng, but Chen Yingying doesn't know that the murderer and Song Simeng know each other......" Li Meng shook his head and said a tongue twister-like analysis.

"It's a bit messy, but I agree with Sister Li Meng's opinion. According to the results of the on-site investigation, this is the case. It's just that we don't know if the murderer has found what he needs. Jiang Tingbai stood up, took off his white gloves, and said seriously.

"So, if the killer doesn't find what he needs, he will continue to kill." I slowly raised my head, looked at Jiang Tingbai, and said quietly.

"Lao Qin, if there is nothing wrong, I will go back to do an autopsy." Ren Qiushi walked out of the bedroom and said to me.

"Okay, there's nothing more to do, I'll wait for your autopsy report." I took a deep breath and said to Ren Qiushi.

"This is a serial murder case, the murderer is very professional, and the knife is deadly. It is estimated that apart from this knife wound, the autopsy did not draw any conclusions. The time of death of the deceased was within two hours, and the murderer also called the police after the murder was set up at the scene, and he must have been looking forward to seeing this 'work of art'. Ren Qiushi nodded and evacuated the scene of the crime with Zeng Lan.

The technical team is still doing the final work of collecting and securing physical evidence, and we will be evacuating the crime scene later.

"Since there is no way to investigate the social relations of the deceased, we can only think from the perspective of the murderer. There are any important documents, which are only available to Song Simeng and Chen Yingying. I changed my mind and suddenly spoke.

Therefore, we have to look for clues from the intersection of Song Simeng and Chen Yingying's lives. If we had thought about this earlier, we might have avoided ......," Li Meng said, not continuing.

"There is no way to avoid this kind of thing, the murderer is a madman, a madman who likes art. No one can predict the actions of a madman, but fortunately, we can still use the profile of the suspect before, but it is just a different direction of investigation. I said lightly.

"After the murderer kills someone, he uses roses to decorate the scene, there must be some purpose for this." Lin Zifan suddenly looked at me and made a somewhat strange sound.

"It's normal, there are too many perverted serial killers who are willing to leave some clues after the killing. They thought it was a provocation to the police, but they didn't know that it was a key clue. Jiang Tingbai said with a smile.

"Judging by the petals of the roses, this is a large bouquet of roses, and it is relatively fresh. Investigate from a nearby florist to see if there are any people who have recently come to buy flowers in line with the criminal profile, so let's withdraw first, I always feel that I should be able to find some important clues. I straightened up and left Chen Yingying's house.

The important clue I mentioned was just a gut feeling, and I am not sure. That is, from the past cases, to see if there are some similar cases.

It is an obvious personal habit for the murderer to set up the scene and leave roses. If we can find the same case, we can learn from the experience of previous case investigation and provide us with some key clues.

When I returned to the Ningzhou Municipal Public Security Bureau, I immediately opened the internal website of the public security organ, typed in the keyword "rose", and searched for the case.

There are more than 70 cases searched through this keyword, and all the cases involving roses have occurred nationwide since the late 50s of the last century and until today, spanning more than 70 years.

I flipped through the files of many cases, and the roses in many cases were not key clues, and I didn't find a case that matched my heart.

Subsequently, I carried out a continuous keyword screening of cases, and a case appeared in my sight.

This is an accidental car accident case that occurred five years ago, a female driver was driving due to fatigue, on a remote side road, the car drove off the road, hit a large tree on the side of the road, and then rolled over and caught fire.

The public security organs opened a case for investigation, and after the autopsy of the forensic medical department and the investigation and visit of the criminal police team, no suspicious points were found, and several key suspects also had alibi certificates.

No suspicious traces were found at the scene of the crime, which was consistent with a traffic accident caused by fatigue driving, and was finally characterized as accidental death.

There is only one point, and that is that in the car driven by the deceased, a large bouquet of roses was found.

The bouquet of roses was placed in the trunk of the car, and when the police saw the roses, the bouquet was very complete. After such a serious car accident, as well as a rollover, the rose turned out to be intact, not even a single petal fell.

This was very strange and attracted the attention of the police, but nothing was found through this bouquet of roses. In unexpected cases, many things are sudden and accidental, maybe there is some special magic in this bouquet of roses.

But what really struck me as strange was the deceased in this accident, the deceased was named Li Xuezhen, Chinese New Year's Eve, unmarried, and the marketing director of a chain bathing center company.

"Bathing center?! Marketing Director?! I frowned and muttered.