The parents of the missing girl immediately rushed to the Ningzhou Municipal Public Security Bureau after receiving the call from the public security organs, and Officer Wang had already received the two in the interrogation room and made a record for them to investigate the details of their daughter's disappearance.

Officer Wang obtained the identity information of the missing girl, as well as a photo of the girl.

Zhou Yi, female, 17 years old, graduated from high school, from Linshi, took advantage of the vacation before the start of the university to visit her grandmother's house, disappeared three days ago, before the disappearance said that she was attending a class reunion, and has not returned, and the family has not received any phone calls about the news of her daughter during this period.

From this, it can be basically concluded that this is not a kidnapping case with the intention of making money.

The criminal police took a blood sample from Zhou Yi's parents and prepared to do DNA comparison with the human finger bones found in this case to confirm whether the deceased was their daughter Zhou Yi.

Now that Zhou Yi's detailed information is available, the investigation can begin, and the members of the serious crime team immediately went to investigate according to Zhou Yi's identity information to see if she had bought a ticket, stayed in a hotel, and entered and exited Internet cafes and other places where she used her ID card.

Send out the criminal police to investigate Zhou Yi's classmates in the city, whether they have contacted Zhou Yi recently, whether they have found Zhou Yi's abnormal behavior, and at the same time investigate the members of Zhou Yi's class reunion and the places that Zhou Yi often visits, investigate and monitor along the road to see if any clues can be found.

Now, I'm going to go to the forensic department to ask about the situation, calculate the time, and the DNA test results of the frozen fingers should be out.

In the forensic department, Zeng Lan was sitting in his office typing on the keyboard and writing a report.

"Team Qin." When she saw me enter, she said hello to me.

"What about the section chief?" I asked her.

Zeng Lan pointed to the dissection room inside and replied, "Section Chief Ren is in the dissection room." ”

I smiled and nodded, and was about to leave, when I suddenly found a big bag of chicken wishbones in the trash can next to Zeng Lan's leg.

"Why, don't you eat it?" I asked her with a smile.

Zeng Lan looked at me and waved her hand with an embarrassed face: "If you don't eat it, you won't eat it, I don't want to eat chicken wishbones in my life." Now I want to vomit when I see a chicken wishbone. ”

I laughed, thinking that the doctor was still afraid of this, but I didn't say this, and walked directly to the dissecting room inside.

In the dissection room, Ren Qiushi was sitting in front of the workbench, looking at the two fingers found in this case in a daze, he didn't say a word, he didn't know what he was thinking.

"Old Ren, what do you want?" As soon as I entered the door, I shouted at him.

Ren Qiushi was stunned for a moment, turned to look back at me, and said in a deep voice: "Old Qin, I was about to look for you, the DNA test report of two fingers came out, and these two fingers are from the same person." ”

Then, he handed me the DNA test report, and I couldn't understand the academic terms on it, so I just glanced at it and looked directly at the conclusion at the bottom of the report.

"Did the DNA of the girl's parents be tested?" I put the DNA test report on the table and asked him again.

Ren Qiushi was still looking at the fingers in his hand in a daze, lowered his head and said to me: "Zeng Lan has just sent the blood sample to the DNA room of the laboratory department, and the results will be available tonight." ”

Seeing that he was staring at the fingers in front of me all the time, I was also curious about what he was looking at.

I pulled out a chair, sat down next to him and asked, "What do you see?" ”

"I'm investigating the cause of death." Ren Qiushi said in a deep voice.

After his reminder, it occurred to me that for these two fingers, we only have an approximate time of death, but there is no cause of death. Anyway, we only have two quick-frozen fingers now, how can we investigate the cause of death?

Ren Qiushi calmed down and said to me: "These two fingers are from the same deceased, judging from the skin of the fingers, the deceased should be a woman, judging from the length and articular surface of the fingers, the two fingers are the little thumb and ring finger of the deceased's right hand.

Both fingers were quick-frozen, so there were several cases of the cause of death.

First: the fingers were cut off while the deceased was alive, and then the body was cut up and frozen.

Second: the fingers were cut off and frozen after the death of the deceased.

Thirdly, the deceased is the finger that was cut off after death, the whole was frozen and preserved, and then the body was cut off.

Fourth: The deceased was frozen alive and dismembered after the body was completely quick-frozen.

The different order of death and dismemberment corresponds to different causes of death. I also used the remaining musculature of my fingers to investigate whether my fingers had been pickled or steamed before they were quick frozen.

The different judgments of each link will make the case have a completely different direction.

The cause of death is important for forensic medicine, and even more important for solving crimes. ”

Ren Qiushi put down the fingers in his hand, let out a long sigh of relief, and said lightly.

I nodded, Ren Qiushi's analysis is very reasonable, the cause of death is unknown at present, but I believe that Ren Qiushi has his own judgment.

"So, did you find anything?" I sat down next to him and asked seriously.

"With only two fingers right now, an autopsy is really hard to do." As he spoke, he picked up his finger and explained to me as he spoke, and it seemed that he really wanted to teach me how to perform an autopsy.

Ren Qiushi said slowly: "The cut surface of these two fingers is at the joint, and the cut surface is very flat, and the bone joint is not damaged. It can be seen from this that the murderer's knife skills must have been very delicate, and he seems to be a person who often uses knives, and the murderer is very knowledgeable about the skeletal structure of the human body.

You must know that the gap between the joints and joints of the human phalanges is very small, if the meat seller uses a kitchen knife, he will never cut so accurately, and the murderer should use a thin and sharp knife, which is different from the kitchen knife and the knife used in the production workshop of Baiyun Food Company, they will never cut carefully along the joint gap.

The blood vessels of the human finger are very thin and dense, and there are digital arteries and veins. After death, the blood no longer flows, it does not provide nutrients to the body, especially the fingers, and it will definitely die of ischemia for a long time.

If the deceased is dismembered and frozen immediately after death, the residual blood in the finger will also be frozen, the gel-like nature of the blood will be seriously damaged, and the blood will penetrate into the bone at the same time.

So according to my preliminary autopsy results, the deceased should have died after the body was preserved for a period of time, then the fingers were cut off, and finally frozen. ”

Ren Qiushi told me about the cause of death of the deceased in this case, which was only a conclusion based on two fingers.

The body of the deceased was stored for a period of time after death and then frozen, and the murderer behaved in such a unusual way, what was his purpose in doing so......