The on-site investigation at the garbage dump probably lasted less than an hour, and the crime team members gradually withdrew.
Li Donglin is organizing a meeting with members of the serious crime team in the No. 2 conference room of the Dongzhou City Criminal Investigation Detachment.
“My suggestion is to start the investigation from Zhu Panpan’s interpersonal relationship.”
During the meeting, members of the serious crime team began to express their opinions on the direction of the investigation of this case.
“I carefully studied the 10 murder files of the Red Killer and found that there is a common detail.”
Since receiving this mission, members of the crime team, including Wang Song, Lu Chuan and others, began to study the files of the red killer's previous murders.
Wang Song found a unique clue here.
“In addition to the fact that all the victims are wearing red clothes, another clue is the professional characteristics of these victims. They are all in places with dense crowds.”
Speaking of this, Wang Song Begin to list the professional characteristics of several victims.
“The first victim worked at a battery factory 15 years ago, the second victim worked in a supermarket, and the third victim worked at a farmer’s market...”
"The victim this time, 15 years later, worked in a supermarket. These places are all crowded places, and the flow of people is relatively large."
The police have done a lot about the identity of the killer in red. assumed.
First of all, is there any relationship between the red killer and these victims?
Do they know each other?
Is there any possibility of intersection of interpersonal relationships?
Psychological experts sent by the provincial department and many veteran criminal police officers believed that the suspect and the victim should have known each other.
In other words, there is the possibility of intersection of interpersonal relationships.
"I personally think that there should be an intersection between the victim and the murderer. If we investigate from the interpersonal relationship of the victim, the possibility will be greater."
Wang Song feels that the victim and the murderer The suspects probably knew each other, but were not very familiar with each other.
Because I have previously investigated whether the interpersonal relationships of the 10 victims have the same intersection, but no major clues were found.
Wang Song believes that the relationship between the suspect and the victim is relatively weak.
"To be precise, I think they have the kind of familiarity where they have no contact information but know each other's names."
"I personally suggest that starting from Zhu Panpan's Conduct investigations in this area among interpersonal relationships, especially among his colleagues in the supermarket. "
"In addition, I suggest that all 593 suspects be investigated in South Lane 2 of Jianguo Road where the finger was found. Everyone is collecting DNA information."
After listening, Li Donglin looked at Song Mingguang.
"Old Song, what do you think?"
"My idea is similar to Wang Song's. We need to collect DNA information from all suspected criminal suspects and then compare it with the body fluids found in the victim's body. "
Song Mingguang then said: "In addition, I suggest that the search scope should be expanded, especially at the landfill. Although there is no monitoring in the garbage plant, there is a link to the landfill. There are surveillance cameras on the road to the burial site, and these surveillance systems need to be monitored on a large scale.”
“According to the existing clues, the time when the murderer abandoned the body should be on the night of the fourth day of the Lunar New Year. During the daytime on the fifth day of the lunar month.”
There are people picking up rubbish in the landfill every day. The body in red was discovered during the day on the fifth day of the Lunar New Year, and someone also entered the house on the fourth day of the Lunar New Year. That landfill pit, but no body was found.
So, Song Mingguang and others judged that the other party abandoned the body on the night of the fourth day of the Lunar New Year.
“My suggestion is to screen all vehicles and all people passing by on the road that may reach the landfill during this period. No matter where these people go or for whatever reason, all of them should be screened. DNA information collection. "
Song Mingguang also studied the case files of the red killer carefully. It can be said that in the first 10 cases, the police basically used all possible methods.
Among these experts are people from provincial departments and even ministries, but none of them caught any criminals in the first 10 cases. To be honest, no one is sure about the probability that the crime team will be able to solve the case this time.
Therefore, Song Mingguang's approach is relatively conservative, which is to screen all possible persons. No matter how long it takes or how costly it is, in short, all persons who may appear at the scene of the crime must have DNA information. Collect and then compare it with body fluid DNA to identify the murderer.
Although this method is time-consuming and labor-intensive and sounds stupid, Li Donglin actually agrees with it.
This killer in red has killed 11 people in a row. His psychological quality should be very mature, his killing methods are brutal and brutal, but he is also very capable of hiding himself. He should have strong anti-reconnaissance capabilities, otherwise Otherwise, he wouldn't have been able to get away with it for so many years.
"Lu Chuan, what are your needs?"
Lu Chuan shook his head: "The technical team is already giving us full support, and I need to carry out follow-up on the corpse. After investigation, we found the black plastic bag with the severed finger and the garbage inside, all of which will undergo a technical appraisal tonight.”
Lu Chuan's main advantage lies in on-site investigation. Although the crime scene this time was messy and no effective information was collected, there are some things that the criminal suspect may have come into contact with. Lu Chuan wants to start from this aspect.
The meeting ended quickly, and each group of people followed their own guesses and assigned tasks to Li Donglin.
The Dongzhou City Criminal Investigation Detachment was completely disbanded and all cooperated with the Serious Crime Team to conduct relevant investigations.
The laboratory of the current investigation office of Dongzhou City Criminal Investigation Detachment.
Lu Chuan had already obtained it and found all the garbage inside the black plastic bag with the severed finger.
On the black plastic bag, Lu Chuan planned to do a technical appraisal, mainly to see if there was any possibility of finding fingerprints.
There is also the garbage in the black plastic bag, including paper towels, vegetables, leaves, and other trivial garbage, all of which were taken out without any clothes on.
What caught Lu Chuan’s attention was the tea leaves that had been brewed.
Because it is still winter and the temperature is relatively low, the contents of the garbage have not deteriorated. The Dongzhou City Criminal Investigation Detachment directly froze the relevant species after collecting them.
“Dahongpao?”
Lu Chuan discovered that these tea leaves turned out to be top-quality Dahongpao tea leaves left after brewing.
Most of the people living in North Lane 2 of Jianguo Road are working and renting households. How can anyone afford such a Dahongpao?
Lu Chuan usually likes to drink tea.
Of course he is no stranger to this top-notch Dahongpao.
This is a good thing worth tens of thousands of yuan per tael. (End of chapter)