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

After attacking the staff on duty, the suspect did not pause or hesitate at all. He went straight forward to take the other party's access card, and then swiped the card to enter the building. What does this indicate?
This shows that the other party is quite familiar with the floor layout of the entire construction site, and knows very clearly where the murdered staff on duty put the access card, whether it can be swiped open, etc., and the other party did not explore or hesitate at all.

The crime was committed by an acquaintance!

Even if the perpetrator was not an acquaintance, he must have frequently visited the Oriental construction site and was familiar with the situation inside. At least he would have seen the on-duty personnel or other staff on duty taking out the access card and swiping the access card.

The scene in the hall ends here, and then the camera turns to the surveillance scene in the corridor on the second floor of the construction site. The other party is seen coming out of the stairwell and running straight to an office on the left side of the stairwell.

After hearing a loud bang, I saw the suspect escorting a staff member on duty out. The other person had his hands raised high, and the suspect hit him on the back of the head with the bang.

There seemed to be no conversation between the two people. They came directly to the warehouse. After the person on duty opened the attack warehouse, the other party launched the attack without any hesitation!

"Stop."

There is a special camera at the entrance of the attack warehouse. Anyone passing by or entering the attack warehouse will be recorded by this camera.

The suspect did not seem to have any intention of destroying the surveillance footage at the construction site, and all of his actions were captured on camera.

Of course, the suspect was not unprepared. When entering the construction site, his face was covered and he wore gloves, so no trace would be left.

This is also the main reason why the other party is fearless and dares to expose themselves to surveillance.

Because of this, the other party did not damage the surveillance, which allowed Lu Chuan and his team to see some details when the other party opened the attack warehouse.

The management mode usually adopted by the warehouse on the construction site is a two-person management mode.

Generally speaking, warehouses on construction sites have either two locks or one lock with a password.

In the case of two-person management, the keys to the two locks are kept by two different people. Two people must be present at the same time when opening the warehouse, and an application report must also be filled out.

Or one person holds the key and the other holds the password. Only after the key and the password are correctly entered can the raid vault be opened at the same time.

The warehouse doors in the Oriental construction site have not been replaced, because if they were replaced, the new warehouse doors would all be opened with a lock and password.

The raider's warehouse at the Oriental construction site was locked with two locks, which meant that the suspect could only open one lock when he held the on-duty worker hostage to open the lock.

Surprisingly, when the staff on duty opened one of the locks, the suspect suddenly attacked, then he took out a key and opened another lock.

"Today, let's play the video of the killing of the duty officer in the duty room again."

"Ok!"

Soon, the video just played was finished.

Lu Chuan observed carefully.

It was discovered that when the suspect escaped, he stole the access card from the on-duty staff and also took the key.

However, because the duty desk was blocking the surveillance, Lu Chuan did not see what the other party took. He just saw the other party take out the access card and open the door, so he thought that the suspect only took the access card.

But now it seems... Lu Chuan looked at Qin Jun.

It was obvious that the other party had discovered this situation a long time ago. The people in Qingzhou City Public Security Bureau were not all fools. They did not rest or sleep the whole night after the incident, and they had already explained some details of the crime scene.

Qin Jun sighed: "There is a problem with the management of assault weapons in the Dongfang construction site. According to the normal management process, the two keys should be held by two official duty personnel. If one duty personnel is on duty, the other duty personnel can take the keys home."

Normally, the personnel on duty are equipped with attacks, so they do not need to open the attack warehouse. However, if an emergency occurs, the personnel on duty at home can also rush to the construction site to cooperate in opening the attack warehouse.

"But the storage method adopted by the Dongfang construction site is that the on-duty personnel keep one key, and the other key is at the duty desk. Whoever is on duty keeps that key. The suspect robbed it at the time. In addition to the access card, there should be another key."

"Has the body been examined?"

"We checked it, and the duty desk has also checked it, and we confirmed that the key was indeed taken from the duty desk by the suspect."

In this way...

Lu Chuan did not worry about whether the current process of managing assault weapons at the Dongfang Construction Site was correct. This was a matter for the future and it didn't matter anymore. He just needed to catch the man first and deal with the follow-up matters later.

"Then we can basically conclude that it was an acquaintance who committed the crime."

"It's possible."

"It's not possible. It must be someone familiar who committed the crime. He was very familiar with the management model of the warehouse at the Oriental Construction Site. So he attacked and killed the person on duty without hesitation and got the access card and key. After that, he forced the person on duty to open the warehouse. This shows that he is very familiar with the entire internal management process of the Oriental Construction Site."

Lu Chuan then asked: "Have you conducted any investigation on the duty personnel who resigned or were transferred from the Dongfang construction site in the past two years?"

Investigate?

Qin Jun shook his head.

"We have been dealing with the situation on the scene since yesterday, and have not yet reported further to our superiors. The director is also busy with the blockade, so..."

Okay, stop talking.

Lu Chuan knew that the on-site survey here was not done well enough and was obviously one step behind.

Such important information should be reported to your superiors as soon as it is discovered, depending on the situation.

If I had wanted to report right after I sorted out the video last night, I guess everything would have been checked out by now, and the identity of the suspect might have been confirmed.

This on-site investigation is different from previous on-site investigations for Qin Chuan. The other party is completely exposed to surveillance, so ordinary fingerprints or footprints are not of great reference significance to Lu Chuan. Anyway, it is useless for the other party to leave fingerprints while wearing gloves.

As for judging someone by their footprints, their height, weight, body shape and other related characteristics are already very clear. The comparison is not very meaningful, but of course it is not completely meaningless.

So the first thing Lu Chuan wants to look at is the relevant monitoring information.

After making a basic judgment, Lu Chuan immediately called Li Donglin. (End of this chapter)