For the fingerprint identification analysis of the second corpse, Lu Chuan ran around in the system as soon as he returned from the scene.
The result was the same as the first corpse. There was no target information in the system and the identity verification failed. When Yang Sen compared the DNA information of corpses, he just followed the process and did not expect to gain anything.
The results of the systematic comparison are an unexpected surprise. Rushing to the computer, Yang Sen quickly checked the comparison results.
Lao Bai and Lu Chuan on the side also put down their work and gathered around. If the comparison is successful, the identity of the second corpse will be confirmed.
"Did it work?" When Lao Bai came over, Yang Sen had already seen the result, but the result was a bit unexpected.
"It's a comparison...it's not even a comparison." Lu Chuan walked to the computer and took a closer look. There was indeed a prompt that the homologous DNA information comparison was successful.
However, the target of the comparison was the DNA information of the first corpse discovered yesterday.
"Do the DNA information of these two corpses have the same origin?" There are many types of comparison of DNA information.
For example, the same identification is to determine identity information through DNA. In addition, there are paternity tests and homologous DNA confirmation.
The former determines the genetic relationship between parents and children, and the latter determines the relationship between siblings. The results now appearing on the computer confirm that the DNA genetic material of the body found yesterday and the body found today are homologous.
The two are sisters.
"I'll tell Team Qin the comparison results first." Liu Guodong pulled out the comparison report from the printer and went directly to report it.
Although the identities of the two corpses have not been confirmed, the relationship between the two is sisters, which is also very helpful for solving the case.
When the frontline is investigating, the scope can be narrowed down. After the brief surprise, Lu Chuan got busy again.
The physical evidence collected this morning must be analyzed as soon as possible. Then Lu Chuan would collect trace evidence from the second corpse.
Judging from the current clues, the construction site of Qinghe Playground is definitely not the first place where the murderer committed the crime.
The method of killing the two men was the same, and the murderer was the same person, so the first scene of the murder was most likely in the same place.
The trace evidence analysis of the second corpse can be compared with the trace evidence analysis of the first corpse, and new discoveries may be made.
It was already three o'clock in the afternoon when Lu Chuan finished his work.
"Master, I'm going to the forensic doctor to collect trace evidence from the second corpse." Liu Guodong nodded: "Do you need our help?" The trace evidence from the first corpse has been sent to the provincial technical appraisal center.
Director Song Jiangguo personally called the leader of the Technical Appraisal Center, and the results should be available soon. After all, the demand for trace evidence identification in the province is not very large, or only a few times a year.
The manpower over there is still free.
"No, I asked Shen Yan for help yesterday," Lu Chuan looked at the time: "And the autopsy is being done over there today. I'll go and see if it's done." There is only one dissection table in the autopsy room, and Lu Chuan has to wait to collect trace evidence. The autopsy on the previous corpse must be completed.
Anatomy room. Wang Changjiang had just taken off his white coat and was washing his hands. Unlike Shen Yan, who was fully armed, forensic doctor Lao Wang was much more casual during the dissection.
Masks generally only have one layer, and protective isolation gowns and the like are not used at all. Only gloves require two more layers.
"Brother Wang, are you finished here?" Wang Changjiang turned his head and smiled, showing his big white teeth: "Routine dissection, some findings, but not much, just finished."
"Oh?" Although Lu Chuan is not a forensic doctor, he is still interested in the findings of the forensic doctor: "Brother Wang, what have you found?"
"There are bruises on the subcutaneous tissue. The deceased may have received some blows before he was killed. However, it took a long time and the murderer's method was more secretive, so the skin was not injured." Shen Yan also took off her protective equipment at this time: " The deceased's wrists and ankles discovered yesterday had tape restraint marks, which should have been left by the murderer during the attack." The autopsy report has been sent to Qin Yong, but it is not very helpful.
In an autopsy, the incision is followed by an examination of the chest, abdomen, and pelvis. Conduct visual inspection of all organs to determine the degree of corruption and possible poisoning.
And based on the freshness of the organs, the time of death can be determined more accurately. The time of death of the first body was around 1 a.m. the day before yesterday.
After the murder, the murderer dumped the body directly.
"Although the outside of the body was frozen stiff, the stomach and organs were not completely frozen. During the autopsy, no signs of frozen organs were found." Wang Changjiang shook off the water stains on his hands: "Xiao Lu, you are here to deal with the second Do you want to collect trace evidence from each corpse?" Lu Chuan nodded: "I've done it for the first one, and I'll do it for the second one too, and see if I can gain anything."
"Okay, Xiao Shen will help you, and I won't accompany you." Wang Changjiang left, and Lu Chuan began to collect trace evidence from the second corpse.
Shen Yan has already cooperated once and has experience this time. That's what it's like to be a criminal police officer. When you solve a case for the first time, you're always a little confused.
The more cases you solve, the more skilled you become. This is also the reason why many suspects are caught immediately after killing someone.
What a criminal police officer does all day is to deal with criminals, but a murderer may only have one chance to deal with a criminal police officer.
When it comes to killing someone, no matter how much you practice or plan in advance, it's not as good as the skill you get by doing it several times. The reason why serial murder cases are difficult to detect is because the murderer was not caught after killing the first person, and was not caught after killing the next person.
As a result, once you are familiar with it and have experience, it becomes even harder to catch. Because the first corpse had just been dissected on the autopsy table, the second corpse was temporarily placed on the ground in the corner.
There is a refrigerated cabinet for corpses in the autopsy room, but the corpse was meant to be thawed for dissection, so it was impossible to put it in the refrigerated cabinet.
It took some effort for Lu Chuan and Shen Yan to get the body to the autopsy table. Every dissection is no less than an operation performed by a doctor.
The smooth dissecting table had been cleaned up by Shen Yan and even disinfected. This ensures that the body will not be contaminated again.
Moving corpses in the criminal investigation detachment's autopsy room is actually no different from moving any object. But if it's at a funeral home...it might feel different.
"I'll scan it with an ultraviolet inspection lamp first." With yesterday's experience, Lu Chuan focused on the wrists and ankles of the corpse this time.
Sure enough, the traces of the tape binding were clearly visible under the illumination of the ultraviolet lamp. Not only that, on the inside of his left ankle, half a faint fingerprint appeared in Lu Chuan's field of vision on the tape mark.
Although the fingerprints are not very clear, they are enough for fingerprint identification analysis. Could it be left behind by the murderer?
"Help me get the examination light." Shen Yan opened the corpse's thighs, her mood rising. If these were really the fingerprints left by the murderer, the case might be solved!
Intermediate fingerprint collection skills are perfect for use here. Soon, Lu Chuan completed the collection of fingerprints. However, the more he looked at it, the more familiar the fingerprints seemed to Lu Chuan.
It seems like I have seen it somewhere!
