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

Lu Chuan shared his discovery without hesitation.

"Director Li, the suspect is very familiar with the mandatory management process system of the Dongfang construction site, and is also very familiar with the layout of the floors. I suspect that the suspect is an internal staff member. I suggest that the investigation start with the internal staff of the Dongfang construction site. The staff who have resigned, the staff who have been transferred, and all the staff in office should be included in the scope of the investigation."

Li Donglin did not expect that Lu Chuan had made such a breakthrough in such a short period of time.

"Is there a time frame? Can you determine when the suspect worked at the Dongfang construction site?"

Generally speaking, the turnover of personnel on a construction site is not too large, but this is only true in relative time. If the timeline is extended, then the scope of the translation will be difficult to determine.

"10 years, the other party should have worked at the Dongfang construction site for less than 10 years."

The reason why Lu Chuan made this judgment is that the warehouse management habits of the Oriental construction site started ten years ago.

"When the suspect entered the duty room, he attacked the staff member on duty and stole the access card and the warehouse key from him. According to what I know, one of the two keys for the warehouse management of the Dongfang construction site is in the duty room. Whoever is on duty every day is responsible for guarding this key."

"And the other key was with the staff member on duty at the time. I asked him about this situation and he always carried this key with him no matter what time it was. This means that the suspect was very familiar with the situation at the Dongfang construction site. He knew that the staff member holding the second key to the armory was on duty yesterday."

"That is to say, if other staff were on duty, the keys would not be in the construction site at the same time. The suspect knew this very well. I roughly understood the basic situation. This management model of the Oriental construction site started 10 years ago."

Since this management model started 10 years ago, the time the suspect worked on the construction site would probably be within this range. Of course, the possibility of exceeding this time range is also uncertain, but Lu Chuan thinks it is more likely that the other party worked on the construction site in the short term.

After the two of them briefly discussed the changes, Li Donglin immediately made relevant deployment arrangements.

A detailed investigation was conducted on all the staff and workers who had resigned and transferred from the Oriental construction site over the years at the time of the incident.

Where are these people? Did they have time to commit the crime? And so on. We will start investigating one by one.

Of course, this investigation cannot be completed in one go. It is impossible to investigate all these issues in just a few minutes or hours.

Lu Chuan is still conducting on-site investigation, and the main focus of this investigation is on the retrieval of surveillance.

After attacking the two police officers, the suspect left the construction site with the weapons and dangerous goods, which he stuffed into his arms.

He didn't bring any backpack when he came, and police assault weapons are relatively small, so the other party could easily hide the weapon on his body.

"Director Qin, have you checked the surveillance outside the construction site? Have you determined the escape route of the other party?"

Qin Jun nodded.

"We have retrieved the surveillance video, but because time was tight, we mainly analyzed the surveillance inside the construction site last night. Some surveillance outside is still being collected, but we have not found the other party's escape route."

"Director Jin, please contact all the people you can find and notify our Criminal Investigation Division. I need to arrange for people to check the surveillance information materials in all the roads and alleys near the construction site as soon as possible. We must determine the route the suspect took to leave as soon as possible and try to find other relevant information about him."

"Okay, I'll report right away."

It has only been 10 hours since the crime occurred. In fact, even if the serious crime team did not come, the Qingzhou Municipal Public Security Bureau would still have to arrange an investigation.

After Lu Chuan made the relevant arrangements, he reported to Li Donglin that he might need more people.

Li Donglin was in charge of the coordination and was sure that there would be no problem with this issue. He first assigned 50 people to Lu Chuan to check all the surveillance data.

The on-site investigation at the construction site is still ongoing. Qin Jun is responsible for the relevant personnel dispatch 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 was very clear. After entering through the main gate, he went directly to the duty room and attacked the staff on duty without any delay.

The whole process took less than half a minute. After taking the access card and key, the other party went straight to the staff duty lounge on the 2nd floor.

After the attack, the escorted staff member opened the warehouse with him and without waiting for any reaction from the staff member, they directly attacked and shot the other party in the head.

There were quite a few weapons in the warehouse, but the other party only took two, as well as several boxes of dangerous goods, a total of 457 rounds.

The whole process can be described as smooth as flowing water. It took less than two minutes from the time the other party entered the construction site to the time they opened the warehouse, and three and a half minutes from the time the other party picked up their weapons and left the construction site.

"Male, height 177 cm, weight about 65 kg, walks with his feet turned outward. Please note that when the suspect walks with his feet turned outward, his left foot is 0.1 to 0.2 seconds ahead of his right foot. His left foot must have been injured."

The crime scene was fully monitored, so Lu Chuan's on-site investigation focused on analyzing some of the situations of the suspects in the surveillance footage.

However, surveillance cameras are usually shot from overhead angles, so while the body shapes of the people captured are relatively easy to judge, their heights need to be compared.

Comparing with the surrounding doors, windows and buildings, Lu Chuan easily calculated that the other person was about 1 meters tall, of medium build and weighed about 77 kilograms.

All 50 grassroots staff members have gathered in the temporary meeting room of the construction site and are now checking the nearby surveillance videos one by one. All the surveillance videos were collected last night.

"Don't focus on the person's face. He may have changed clothes when he left, or he may not have covered his face. We can't see these features in the surveillance video. You must pay attention to the outward-turned gait I just mentioned and the height of 1 meters."

Lu Chuan held a short meeting with 50 people, mainly to remind everyone that the suspect's walking posture is easy to judge in the surveillance video. (End of this chapter)