Retracing the Police Path 1993

Under Master Wang's explanation, Liu Pengcheng finally understood what he meant by "it is impossible to derail and overturn under any circumstances".

Whether it is a toy train or a real train, there are two necessary conditions for derailment.The first is that the center of gravity of the body is shifted.The angle of deflection is enough to cause the carriage to overturn.The second is when the wheels leave the rails.

Generally speaking, the first condition that satisfies these two conditions is speeding and turning at a large angle.The second is that there is very strong debris on the tracks, and the third is that the train hits something, like a road block or another train.

As far as the cartoon train in the children's park is concerned, its maximum speed turning is not enough to make it overturn.And every time before the departure of the train, the technician will roughly look at the route, and there is no possibility of hitting something. After all, the technician is not blind, and he can't see anything that can knock the small train over.

As for the sundries on the rails, this is also impossible, because the first car of the small train, that is, there is an obstacle remover in front of the front of the car, which is the pointed, red thing that clings to the rails.That thing is also on the locomotive, and that is to remove the sundries on the rails.

The obstacle remover of the small train is different, and the weak sundries on the rails are pushed aside by it.If the debris is hard and strong enough, it is not afraid.There is actually a small spring mechanism behind the obstacle remover of the small train. The obstacle remover will retract when encountering a hard object, triggering the spring mechanism, and the whole small train will be powered off and stopped in an instant.

Since the speed of this small train is very slow, there is almost no inertia and kinetic energy.Therefore, Master Wang said that it is impossible for the small train to overturn. Even if there is an unexpected situation, the worst thing is to stop in the end.Instead of falling down.

According to Master Wang, he checked the obstacle remover and the circuit disconnection protection device behind it as soon as the accident happened, and there was nothing abnormal.

What is going on here?
At this time, Liu Pengcheng's phone rang.

When Liu Pengcheng picked it up, it was Secretary Ma's call.

Liu Pengcheng hurriedly said hello: "Hi Secretary Ma, I am Liu Pengcheng, what instructions do you have?"

Secretary Ma asked: "Xiao Liu, are you in the children's park?"

Liu Pengcheng said, "Yes, I'm in the Children's Park."

Secretary Ma said: "Let me tell you about some situations. The little girl who died in this accident was the granddaughter and youngest grandchild of Mr. Li in our city. Speaking of Mr. Li, you are a foreigner, so you may not know it. He is the founder of Pingzhou's development. It can be said that without Mr. Li, there would be no Pingzhou today.

It was also when Mr. Li was in power that he first proposed to incorporate Qinghu into the overall strategy of Dapingzhou. This was the reason why Qinghu was withdrawn from the county and established as a district, forming the overall outline of Pingzhou today.The world is impermanent, we cannot change the outcome of a white-haired man sending a black-haired man, but we must give the old man an explanation, do you understand? "

What did Liu Pengcheng say, that he didn't understand?People's leaders said they understood so well, how could he not understand!I had to say: "Secretary Ma, don't worry, we will do our best to solve the case."

Fortunately, Secretary Ma asked again: "Is there any difficulty?"

Liu Pengcheng said: "Really, Secretary Ma, we need an expert in machinery, and we can't rely entirely on the people in the park."

Secretary Ma understood what Liu Pengcheng said. To a certain extent, before the case was solved, anyone in the park who knew machinery, especially the little train, should be suspected.They really can't be completely counted on to solve the case.

Secretary Ma said: "I will solve this difficulty for you, just wait."

After hanging up the phone, support from the Municipal Bureau also arrived. To Liu Pengcheng's surprise, the leader was Lao Gao.

Lao Gao was also very happy to see Liu Pengcheng: "Ju Liu, the special case team has no tasks for the time being, and they have all been transferred here to support you. Let's take a look at the assigned tasks."

Liu Pengcheng said to briefly introduce the case, and said: "After the self-inspection of the park, the obstacle remover of the small train and the power-off protection device behind the obstacle remover are all normal. It is this normality that makes me believe that This must be a criminal case.

Your current task is to strictly screen the two groups of staff of the cartoon train, especially the two mechanics and two technicians. They have skills, and this case should be a high-IQ crime based on mechanical technology. You guys My task is to find out all the trivialities and bezoars and gouges of these two groups of people. "

This is the most basic and oldest method of criminal investigation. Lao Gao nodded: "Don't worry, Director Liu, I'll assign them all."

At this time, the director of the Trace Inspection Center came over and shook his head at Liu Pengcheng: "Ju Liu, nothing was found."

Liu Pengcheng asked, "Do you have metal detectors?"

The director shook his head: "No!"

Liu Pengcheng asked again: "Does the Municipal Bureau have one?"

The director shook his head: "The city bureau doesn't either."

Liu Pengcheng thought that if there was a "thing" that could "cheat" the breaker and cause the small train to derail and overturn, then this "thing" must be metal.There is little doubt about this.

Liu Pengcheng called Uncle Bai directly and offered to borrow the army's metal detector.

Liu Pengcheng can guarantee that the army will have metal detectors. Once this equipment joins the army, it will be renamed "mine detector".

Uncle Bai refused Liu Pengcheng's request without even thinking about it.Uncle Bai said: "What is a metal detector? I call it military equipment! Have you ever heard of military equipment being borrowed?"

Hearing what Uncle Bai said, Liu Pengcheng wiped off his sweat and said that he was really lost.For engineers and soldiers, the metal detector is their "gun", so there is no one to borrow it from outside!

Now Liu Pengcheng stopped chanting.

Seeing that Lao Gao led the criminal police and started to "chat" with the staff of the cartoon train, Liu Pengcheng personally led the police from the police station to search again like a sieve at the scene where the small train overturned, but still found nothing ,
This is not to blame for the police. No one knows what Liu Pengcheng is looking for, even Liu Pengcheng himself doesn't know what he is looking for. The wreck or part of such a device" As for the wreck or part, whether it is round or flat, copper or iron, long or short.Director Liu didn't know anything about it!

At this time, a 212 military vehicle drove over.

A lieutenant got out of the car with a second-rank non-commissioned officer, and found Liu Pengcheng after some inquiries.

This is sent by Uncle Bai.

It is impossible to borrow military equipment!

But aren't you looking for something?We can help you find it!
Liu Pengcheng didn't go to see them looking for things, but found a step to sit down and rest for a while.

Xiao Yang went to open the car door and took out a few cans of drinks.He handed Liu Pengcheng a can of Coke and drank it himself.

Now Liu Pengcheng had to wait. If the two soldiers hadn't discovered anything yet, they could only rely on the team's interpersonal relationship to start with.But, Liu Pengcheng couldn't guarantee [-]% that it was done by the team members.

Without the key physical evidence in hand, there is no confidence to solve the case, especially this kind of thoughtless case.Now that master Wang is still wondering why the little train overturned!

At this time, the non-commissioned officer ran over: "Director Liu, our company commander found something. I don't know if it is what you are looking for. Go over and have a look."

Liu Pengcheng hurriedly followed the sergeant.

How many trace police officers are surrounding a tree?

The captain had already taken off the earphones of the mine detector and sat on the grass beside him. It seemed that he was very confident that what he found was what Liu Pengcheng was looking for.

Liu Pengcheng trotted over a few steps.

A concrete nail, most of which was driven into the trunk.

Liu Pengcheng decided almost immediately that this was what he was looking for!
Liu Pengcheng hurried up to shake hands with the lieutenant to express his thanks!
The lieutenant, however, stood up with the strength of his hand without any notice.

He said with a smile: "We found it, we should go back! Are you Liu Pengcheng? Liu Zhuangzhuang's younger brother?"

Liu Pengcheng was taken aback. "Liu Zhuangzhuang" was his second daughter's nickname when she was a child. A girl gave herself such a nickname in the courtyard with a pair of fists. It's really hard to describe.

But Liu Pengcheng has never lost, so he replied like a conditioned reflex: "Yes, I am. Are you my second brother-in-law?"

The lieutenant's expression changed: "Damn it, don't curse me!"