Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

While Lu Chuan and Chen Weiguo were reporting, people from the Criminal Police Brigade were already at the crime scene, calculating the approximate range where the murderer had dumped the body based on the water flow.

Although the forensic doctor has not yet completed his task, the basic time is almost up.

It is not much different from Lu Chuan’s preliminary judgment. The approximate time of death of the deceased should be around 7 days.

Judging from the current climate and water temperature, the corpse will decompose in the water and produce gases, causing the corpse to rot, and it should take about one to a day and a half to move.

In other words, the time it takes for the corpse to be suspended in the water and move with the current should be between 5 and a half days and 6 days.

The water flow rate of Liaohe River is not fast. The river surface is relatively wide and the water flow rate is relatively slow.

Based on the calculation of 5 and a half to 6 days, the corpse is likely to appear within a range of ten kilometers.

Of course, this is just a rough judgment.

The specific poss point may be close or far, but the difference will not be too big.

After determining the scope, the next step is to conduct a visit and investigation in the vicinity.

Sun Biao sent out two teams of criminal police to conduct investigations in the area from both sides of the Liaohe River, starting from the crime scene and heading upstream to 10 kilometers.

The key is to look for nearby surveillance cameras to see if there are any unusual people or any abnormal findings.

Although transportation on the Liaohe River has stopped in recent years, the environmental governance of the Liaohe River has not stopped, and has been increasingly given an important position.

Moreover, fishing is prohibited on the Liaohe River in recent years. Although ordinary fishing is allowed, fishing boats are not allowed to engage in fishing.

In this case, many surveillance cameras were installed on both sides of the Liaohe River.

These surveillance cameras can help criminal police quickly locate the initial location where the body appeared.

Of course, because the distance involved is quite long, if all residents living near the surveillance areas within a 10-kilometer radius need to be visited, the workload is still quite large.

Sun Biao sent out two squadrons to start investigations on both sides of the Taiwan Strait.

Each squadron is divided into several groups, some of which check surveillance and some visit residents, each performing their own duties.

At the same time, each local police station must dispatch corresponding police forces to assist the criminal police in carrying out investigations.

However, the Jiefang North Road Police Station expended most of the effort, since the case was discovered within their jurisdiction.

Here is a statement about the jurisdiction of a case.

For example, no matter where the body is from, since the body was found by the Haizhou City High-tech District Branch, the case will be handled by the Haizhou City High-tech District Branch.

Even if it is found that the deceased is not from Haizhou City, but from other provinces and cities, it will still be under the jurisdiction of Haizhou City High-tech Branch.

After Chen Weiguo had a general understanding of the situation, he went to the Municipal Bureau with Qin Chuan and made a brief report to his superiors.

The Criminal Police Brigade does not have many clues and there has been no decisive progress in the case. The forensic doctor is performing an autopsy, and only some superficial information has been released for the time being, and the autopsy report has not been completed yet.

In addition, the DNA analysis has not yet produced any results, and the earliest results will have to wait until the evening, so the identity of the victim has not yet been finalized. It was already past seven in the afternoon when Lu Chuan returned from the Municipal Bureau.

In the conference room.

Sun Biao and Wang Zhaokai began to report the relevant situation.

Wang Zhaokai first reported the comparison results in the missing information database.

"After the body was found this morning, we checked the missing persons database in our city and found no missing persons who met the criteria for the deceased."

Lu Chuan already knew this when he left the Criminal Police Brigade and went to Century to report.

Wang Zhaokai continued, "In the afternoon, we conducted a comparison across the province and found no missing persons who met the criteria."

There is no automatic information retrieval system for matching missing persons, so we can only search and compare them one by one.

Although the reported missing persons have identity information, the police cannot directly search for the name during the matching process. However, because the identity of the body itself is uncertain, they can only identify and match the body based on its height, weight and the clothes it was wearing.

Generally, an approximate time range is determined based on the time of death of the deceased, and then the information of missing persons within this time period is retrieved based on gender, and then compared with relevant photos one by one.

The workload is not small. If it is to compare the missing persons in one city, it is relatively simple. However, if it is spread over the entire province, with more than a dozen prefecture-level cities, the number of missing persons is still relatively large.

So generally speaking, the police will first compare the local missing persons and if they cannot find a match, they will gradually expand the scope.

As for comparison across the province and across the country, this possibility basically does not exist.

Although data interoperability is not a problem now, the workload of this comparison is really too huge.

"The forensic results will be out soon. It will take about an hour or so to produce the report."

Wang Zhaokai continued, "In addition, Lao Sun has arranged for people to measure the water flow near where the body was found. Basically, we can locate the location where the body appeared. It should be within 10 kilometers upstream from where the body was found. We have sent people to investigate."

Sun Biao nodded: "Liaohe River is a key monitoring 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 materials are being copied."

In order to strengthen the environmental management of the Liaohe River, the relevant departments have specially established the Liaohe River Management Office, which 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 are seconded from different administrative regions to coordinate with people in each area.

"In addition, the data for this area has been sent out. I have already made arrangements. Um, mainly the Jiefang North Road Police Station will take the lead and send police forces from various places to assist us in the investigation."

The workload is quite large. It will take time to conduct a comprehensive investigation of nearby surveillance within a 10-kilometer radius.

But this work must be done, because even if the identity of the body is confirmed, it will take time to investigate based on the identity of the body and interpersonal relationships.

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 test results. (End of this chapter)