The people who know the situation of Luhai best are the soldiers sent by Wu Zixu to defend Luhai, they are specially defending Luhai, and they have noticed Lu Hai's every move.

Shangguan is setting up the public court at the engineering headquarters and summoning the soldiers who defend Luhai one by one. There are two main questions to ask. One, who often left the guard and stayed alone by the small bridge where the accident occurred. Second, are there any other strangers who often linger by the small bridge?

"No, there are no such people, we have discipline, and we have to ask for leave if we leave the team alone."

Shangguan Zheng said, "So, did you notice that there were strangers lingering by the small bridge?" ”

"No, there are no such people."

Their attention was focused on Lu Hai and they didn't pay much attention to the small bridge. Ask all the people in the Guards and those who are in regular contact with Lu Hai at work. In the end, it was concluded that the destruction of the bridge could not have been done by the guards. It is not a collective act of the guards, because the collective doing this is a big goal, and it is difficult to guarantee that it will not be discovered.

In addition, the engineering headquarters has hundreds of drawings drawn in sheepskin, which are important and cannot be approached by non-engineering personnel. It is also heavily guarded. The focus of their guards is on the headquarters, not on the small bridge. But there are people who linger here, and it is difficult to escape their eyes.

To destroy the bridge, there must be several processes, first, to discover that the bridge is a place that can be used to kill people, and then a plan to destroy the bridge is born. It doesn't have to be the one who destroys the bridge. Or rather, not at all the one who destroys the small bridge.

Once you have a plan, you need to find someone to carry it out. He would hire one or two or three people with a lot of money to destroy the bridge.

After accepting the task, the saboteur will first come to survey the terrain, be fully familiar with the terrain, know when there are people and when there is no one, and then choose the right time to start sabotaging.

Lu Hai's guards are like this, they generally form a circle twenty or thirty paces away around Lu Hai, enclose Lu Hai in the middle, and move with Lu Hai's movement. In the era of cold weapons, if a stranger was blocked twenty or thirty meters away, it would be impossible to hurt Lu Hai.

If Lu Hai returns to the headquarters from the construction site, there must be guards who cross the small bridge first. Then Lu Hai crossed the bridge, and there was a soldier crossing the bridge behind. Lu Hai went to the construction site from the headquarters, and it was the same process.

That is to say, before Luhai crosses the bridge, there must be soldiers who cross the bridge first, and if the soldiers cross the bridge, it will be fine, and Luhai will have something to do when he crosses the bridge.

This requires the small bridge to be made into a mechanism, usually people walk around on it without doing anything, but as long as the next stepping stone is removed, as soon as the person steps on it, the stone will turn over, and the person will naturally fall into the deep ditch.

To make such a mechanism, it is not possible to do it once, it must be done several times. Or even a dozen times.

When activating the mechanism, the person must ambush under the bridge in advance, and after the soldier walks over, he quickly pulls off the stepping stone, Lu Hai walks over, steps over the small bridge, and the person falls.

This plan was carried out at night, because it was daytime, and if a person was ambushed under the bridge, it was impossible not to be discovered by the soldiers.

And at night it is possible. When Lu Hai returned to the headquarters, he usually held a lantern or torch, but he paid attention to the bridge deck, not under the bridge.

Lu Hai is not a security professional, his mind is on engineering, not security, and his vigilance is not as high as that of the guards, so it is possible to hide from his eyes.

After the mechanism was activated and Lu Hai fell into the ditch, the saboteurs had to evacuate quickly. If he is caught, he will confess all the secrets and the instigators behind the scenes, and everything will be revealed to the world.

Because Lu Hai spent most of his time back at Xiangguo's Mansion for the night, and rarely spent the night at the headquarters, he had to wait for the opportunity. The person who activates the mechanism will be lurking around for a long time.

Since the possibility of the Lu Haiwei committing the crime has been ruled out, it can be concluded that it was the construction personnel who committed the crime, but how easy is it to find out this person among the tens of thousands of people who built Gusutai and mobilized tens of thousands of migrant workers?

It is very important to find out this person, and he can confess to the person who bought him. As long as he confessed to the mastermind behind the scenes, Fan Li eliminated a strong enemy.

Fan Li urged Shangguan to solve the case as soon as possible.

According to the analysis, this person should be a migrant worker working on the construction site. Because the construction site is guarded by the military, non-construction personnel are not allowed to enter. And this person should be a masonry, and only if the masonry is familiar with the stone, it is easy to operate.

Moreover, this person is working at a masonry site closest to the small bridge, and the entire construction site is spread out for more than ten miles, and if the distance is too far, it will be too inconvenient to operate.

In this way, the scope of the investigation is narrowed.

The masonry site closest to the bridge is where more than 100 people work. There are more than 30 people over the age of 60, these people are old, their legs and feet are inconvenient, and who will not buy these people behind the scenes.

The remaining 70 or so people are the focus of the investigation.

The person who destroys the bridge, after receiving the money, is ready to carry out the destruction, will definitely appear in the vicinity of the bridge often, and when he appears, he may be seen. At first, the guards couldn't remember because they weren't paying attention. Not taken seriously. But the impression of the fall is still in my mind, and as long as I try to think about it, I can still remember it.

Sure enough, one person gradually came to the surface.

The man was in his thirties, skinny, and looked very lean. He was seen wandering around the bridge by several members of the guard, and others were seen near the bridge at night.

Through deep memories, ten members of the guard once saw the same person appear near the bridge. This shows that this person is suspected of committing a major crime.

Shangguan Zheng said: "Think about it carefully, can you still recognize this person when you see him?" ”

The soldier said: "Lord Hui, this person is very thin, very capable, and easy to recognize." ”

Shangguan Zheng said, "Okay, let's find this guy." Come! Let's go and find all the migrant workers of this masonry team and gather outside the headquarters. ”

"Yes!" A group of soldiers ran away.

There was not much time, more than a hundred masonry, all concentrated outside the headquarters. Then, one by one, go around the small bridges. The Lu Haiwei people watched from the bridge, reconstructing the scene at that time, and it was easier to recall the memories of the witnesses. Soon more than a hundred people walked away.

Shangguan Zheng said to the people of the Lu Haiwei Army: "The person you are talking about is not here? ”

Everyone shook their heads: "My lord, that person is not here." ”

Shangguan Zheng said to Fan Li: "Doctor Fan, did we misjudge? ”

Fan Li said: "There should be nothing wrong? ”

Shangguan Zheng said, "Yes." It should be true, but this man is not in this masonry team now. What's next? ”

Fan Li pondered and said: "If you are Shangguanzheng, complete this matter, and get a reward, what will you do?" ”

Shangguan Zheng said: "Run, the farther you run, the better." ”

Fan Li said: "That's right. It's a bit silly to expect him to stay in the masonry team and work honestly. ”

Shangguan Zheng also understood, and shouted: "Come on, go and call the leader of the masonry team,"

There was not much time, and the foreman came: "Adult, small one is here." ”

Shangguan Zheng said, "Are all the people who came to be identified just now from your masonry team?" ”

"Yes."

"Is there anything you didn't come?"

"Two didn't come, one was Baohuai, who was injured and had been home for many days. The other is named Shi Chen, who has diarrhea and asked for leave to go home. ”

"Is there one of these two people in his thirties who is very thin?"

"Yes, Shi Chen is such a person."

"Where is Shi Chen's house?".

"Shi Chen and I live in the same village, Shizhai Village, ten miles east of the city."

Fan Li shouted: "Gather the team and arrest Shi Chen!" ”