Lu Chuan did not hesitate to tell what he had discovered.
"Director Li, the suspect is very familiar with the mandatory management process system of Dongfang Construction Site, and is also very familiar with the distribution on the floors. I suspect that the other party should be an insider. I suggest that we start investigating the resignation from the internal personnel of Dongfang Construction Site. Personnel, transferred staff, and all current personnel are all included in the scope of the investigation.”
Li Donglin did not expect that Lu Chuan would make such a breakthrough in such a short period of time.
"Is there a time range? Can you determine the time the suspect worked at the Dongfang construction site?"
Generally speaking, the flow of personnel at the construction site is not too large, but this is only within a relative period of time. If the timeline is lengthened, it will be difficult to determine the scope of the translatable objects.
"In 10 years, the other party's working time at the Dongfang construction site should be within 10 years."
The reason why Lu Chuan made this judgment was that the warehouse management habits of Dongfang Construction Site started ten years ago.
"When the suspect entered the duty room, he directly attacked the staff member on duty at the time and snatched the access card and the warehouse key from him. According to my understanding, the warehouse management of Dongfang Construction Site had two keys. There is one in the duty room, and whoever is on duty every day is responsible for taking care of this key.”
"The other key was with the staff member on duty at the time. I asked the staff member on duty about this situation, and he would always carry this key with him. This means that the suspect knew the Dongfang construction site very well. He knew that the staff member holding the second key to the weapons arsenal was on duty yesterday.”
"That is to say, if other staff are on duty, then the keys cannot appear in the construction site at the same time. The criminal suspect knows this very clearly. I have a general understanding of the basic situation. This management model of Dongfang Construction Site is Started 10 years ago.”
Since this management model started 10 years ago, the suspect's working time at the construction site will probably be within this range. Of course, the possibility of exceeding this time range is not certain yet, but Lu Chuan feels that the other party Short term work on site should be possible.
After the two briefly communicated about the changes, Li Donglin immediately made relevant arrangements.
All employees and staff who resigned and were transferred from Dongfang Construction Site over the years carried out detailed investigations at the time of the incident.
Where are these people? Is there a time when the crime was committed? Let’s start investigating one by one.
Of course, this investigation will not be completed overnight. It is impossible to investigate all these issues in a few minutes or hours.
Lu Chuan is still doing on-site investigation at the scene, and the main direction of this investigation is the monitoring and control.
After attacking two police officers, the suspect left the construction site with weapons and dangerous goods. The other party stuffed the weapons and dangerous goods into his arms.
He didn't bring any backpack when he came, and the police assault weapon was relatively small, so the other party could hide the weapon with him.
"Director Qin, have you investigated the surveillance outside the construction site? Have you determined the other party's escape route?"
Qin Jun nodded.
"We have retrieved the surveillance video, but because time was tight, last night we mainly analyzed the surveillance inside the construction site. We are still collecting some surveillance from outside, but we have not found the escape route of the other party." .
"Director Jin, contact me all the people you can find, and inform our criminal investigation detachment that I want all surveillance information materials in the roads and alleys near the construction site to arrange for people to investigate these surveillance materials in the shortest possible time. , we must determine the suspect’s departure path as soon as possible and try to find other relevant information about the other party.”
"Okay, I'll report it right away."
It only took 10 hours from the incident to the present. In fact, even if the serious crime team did not come to do these tasks, the Qingzhou Municipal Public Security Bureau would still have to arrange the investigation.
After Lu Chuan made the relevant arrangements, he reported to Li Donglin that he might need more personnel.
Li Donglin was in the middle of dispatching this issue, and there was definitely no problem. First, he assigned 50 people from Lu Chuanbian to check all the monitoring data.
The on-site investigation at the construction site is still going on. Qin Jun is responsible for the relevant personnel scheduling and video surveillance. The specific location is in a conference room at the Anfa construction site.
The suspect's route of action in the construction site where the crime occurred was very clear. After entering from the main entrance, he went directly to the duty room, and then attacked the staff on duty at the time without any delay.
The whole process took less than half a minute. The other party took the access card and key and went straight to the staff duty lounge on the second floor.
After the attack, he escorted the staff member and opened the warehouse with him. Without waiting for the staff member to react, he directly attacked and shot him in the head.
There were many weapons in the warehouse, but the other party only took two, as well as several boxes of dangerous goods, totaling 457 rounds.
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The whole process can be described as flowing. It took less than two minutes from the time the other party entered the construction site to the time he opened the warehouse, and three and a half minutes from the time the other party picked up the weapon and left the construction site.
"Male, height 1.77cm, weight about 65kg, walks with a splayed figure. Please pay attention. When the suspect walks with a splayed figure, his left foot is 0.1 to 0.2 seconds ahead of his right foot. His left foot should be injured. .”
This crime scene has complete surveillance, so the on-site investigation carried out by Lu Chuan also focused on analyzing the situation of the suspects in the surveillance.
However, surveillance shooting angles are generally overhead shots, so although it is easier to judge the body shape of the person photographed, the height needs to be compared.
Compared with the surrounding doors, windows and buildings, Lu Chuan could easily calculate that the other person's height was 1.77 meters and his body type was about 65 kilograms.
All 50 grassroots workers have arrived in the temporary conference room at the construction site, and they are now checking the nearby surveillance videos one by one. All the surveillance videos have been collected last night.
"Don't pay attention to this person's face. The other person may have changed clothes when he left, or may not have covered his face in these aspects. Currently, we cannot see the characteristics in the surveillance. Be sure to pay attention to what I just said. He walks with a horoscope and is 1.77 meters tall.”
Lu Chuan held a short meeting for 50 people, mainly to remind everyone about the suspect's walk. Posture It is easier to judge the difference in walking posture in surveillance videos. (End of chapter)