While Lu Chuan and Chen Weiguo were making reports, people from the Criminal Police Brigade were already at the crime scene to calculate the approximate range of where the murderer dumped the body based on the water flow.
Although the forensic team has not completed the task yet, the basic time is almost over.
It is similar to Lu Chuan’s preliminary judgment. The approximate time of death of the deceased should be about 7 days.
Based on the current climate and water temperature, the corpse decays in the water and produces gas, causing the corpse to rot. The time it takes for the corpse to be moved should be about one to one and a half days.
That is to say, the time it takes for a corpse to move from a suspended state in the water to follow the current should be 5 and a half to 6 days.
The water speed of the Liaohe River is not very fast. The river surface is relatively wide and the water flow speed is relatively slow.
Based on the time period of 5 and a half to 6 days, there is a high probability that the corpse will appear within a range of ten kilometers.
Of course this is just a rough judgment.
The specific poss point may be near or far, but the difference will not be too big.
After determining the scope, it is time to conduct a visit and survey around the area.
Sun Biao sent two teams of criminal police from both sides of the Liao River, centered on the crime scene, upstream to 10 kilometers away, to conduct visits and investigations within this range.
The key is to look for nearby surveillance cameras to see if there are any unusual people or any abnormal findings.
Although the transportation on the Liaohe River has stopped in the past few years, the environmental management of the Liaohe River has not stopped, and it has become increasingly important.
In addition, fishing has been banned on the Liao River in recent years. Although ordinary fishing is allowed, fishing boats are not allowed to operate if they want to fish.
In this case, many surveillance cameras have been installed on both sides of the Liaohe River.
These surveillance cameras can help criminal police quickly grasp the initial location of the body.
Of course, because the distance involved is indeed relatively long, if all residents living near the surveillance within 10 kilometers need to be visited, the workload is still quite large.
Sun Biao sent two squadrons to start investigations on both sides of the strait.
Each squadron is divided into several groups, some for inspection and surveillance, and some for visiting residents, each performing their own duties.
At the same time, each local police station must also dispatch corresponding police forces to assist the criminal police in carrying out investigations.
But it was mainly the Jiefang North Road Police Station that put in the most energy. After all, the case was discovered within their jurisdiction.
Here is a term for jurisdiction over a case.
Just like this corpse, no matter where the corpse is. Since the body was discovered by the Haizhou High-tech Zone Bureau, this case will be handled by the Haizhou High-tech Zone.
Even if it is found that the deceased person was not from Haizhou City, but from other provinces and cities, he will still be reported to the Haizhou City High-tech Branch.
After Chen Weiguo roughly understood the situation, he followed Qin Chuan to the Municipal Bureau and made a brief report to the superior leaders together.
The Criminal Police Brigade does not have many clues and the case has not made decisive progress. The forensic doctor is doing an autopsy, and only superficial information has been released. The autopsy report has not yet been completed.
In addition, the DNA identification analysis has not produced results, and it will have to wait until night at the earliest. Therefore, regarding the source of the body, the identity of the victim has not been finally determined. It was already past seven o'clock in the afternoon when Lu Chuan returned from the city bureau.
In the conference room.
Sun Biao and Wang Zhaokai began to report on the relevant situation.
Wang Zhaokai first reported the comparison situation in the missing information database.
"After the body was found in the morning, we compared our city's missing persons information database and found no missing persons who met the conditions of the deceased."
This is what Lu Chuan said when he left the Criminal Police Brigade I already knew it when I went to Century Report.
Wang Zhaokai continued: "In the afternoon, we conducted comparisons throughout the province and found no missing persons who met the requirements."
There is nothing to compare missing persons. The automatic information retrieval system can only search and compare items one by one.
Although the reported missing person has identity information, it is impossible for the police to directly search for the name during the comparison process. However, because the identity of the body itself is uncertain, they can only conduct the search based on the height, weight, and clothing of the body found. Identify and compare.
Under normal circumstances, a rough time range will be determined based on the time of death of the deceased, and then the information of the missing persons within this time period will be retrieved based on gender, and then the relevant photos will be compared one by one.
This workload is not small. If you compare the missing persons in a city, it is relatively simple. But if you compare the missing persons in the entire province, there are more than a dozen prefecture-level cities. The number is still relatively large.
So generally speaking, the police will first compare the local missing persons and then slowly expand the scope.
As for comparing across the country beyond this province, this possibility is basically non-existent.
Although data interoperability is not a problem now, the workload of this comparison is really too great.
"The forensic results will be out soon, and the appraisal report will be issued in about an hour."
Wang Zhaokai continued: "In addition, Lao Sun has arranged people We have measured the water flow near where the body was found, and we can basically pinpoint the location where the body appeared. It should be within 10 kilometers from the upstream to where the body was found. We have sent people to investigate.”
Sun Biao Diandian. Head: "The Liaohe River is a key monitored river in our city, so there are many surveillance cameras on both sides of the river. We have communicated with the Liaohe River Management Office, and the relevant video data are being copied."
For To strengthen the environmental management of the Liaohe River, relevant departments have specially established the Liaohe River Management Office. This management office was established by seconding personnel from relevant departments.
Because the Liaohe River flows through many administrative regions in Haizhou City, in order to better communicate, relevant personnel were seconded from different administrative regions to coordinate with the people in which regions.
"In addition, the data dispatch in this area has been sent out. I have already said hello. Well, the Jiefang North Road Police Station will take the lead in sending police forces from various places to assist us in the investigation."
This workload is still relatively large. A comprehensive investigation of nearby surveillance within a 10-kilometer range cannot be completed in a short time.
But this work must be done, because even if the identity of the body is confirmed, it will take time to conduct an investigation based on the identity and interpersonal relationships of the body.
But this is only one aspect. The specific location where the murderer dumped the body may leave some clues, which the police are very concerned about.
After roughly understanding the situation, Lu Chuan, Wang Zhaokai and Sun Biao discussed the following.
At around 10 o'clock in the evening, the autopsy report from the medical examiner finally came out, and there was also news about the DNA identification results. (End of this chapter)