Chapter 252 The First Clue

Wang Min looked at Chen Yan with some disbelief.

Wang Min himself had also looked at the control box and really didn't find anything.

However, Chen Yan only squatted there for two minutes and found the problem.

Moreover, Chen Yan asked him to look.

But even so, Wang Min didn't see anything.

This...

Don't blame Wang Min.

The fuse button was inserted vertically into the fuse box.

The dust on each button was pitifully small.

If Chen Yan hadn't turned on the visual gene lock, he would not have been able to find the difference between that button and the other buttons.

"That fuse button is the fuse that controls the traffic light switch in the direction of Chang'an Road."

"If the contact is poor, it will cause the green light to be delayed."

It's true!

"That is to say, when the car accident happened that day, someone was controlling the control box of the traffic light."

"The other party did not directly turn on the traffic light control switch, but loosened the safety button, causing the green light delay in the direction of Chang'an Road."

"In addition, Jin Nansheng's car had stopped on the roadside twice..."

This was obviously a carefully planned deliberate car accident with time control accurate to the second level.

However, the packaging of the other party was too perfect, leaving almost no flaws.

Although Wang Min knew that this could not be an accident, he was unable to make a final determination of the case due to lack of evidence.

Now, with evidence, the nature of the case can be determined.

Even if this evidence still cannot point to any suspect.

However, this is of great significance to Lin Gang.

Without Chen Yan's discovery, Lin Gang was in an accidental car accident.

With this evidence, it is a deliberate murder. What happened to Lin Gang is different from the concept of accidental death.

"Chen Yan, I thank you on behalf of Lin Gang first!"

"Brother Wang, why are you so polite to me."

With the clues, Wang Min made arrangements immediately without Chen Yan's arrangement.

Comprehensively check the surveillance near the intersection that day.

See if you can find the person who tampered with the control box.

Wang Min himself has actually watched the video.

No problems were found.

The focus of this re-inspection is to see if you can find the person who tampered with the traffic light control box.

Half an hour later, Panshui Town Detective Team.

The current Panshui Town Detective Team has become a ruin.

"The fire that day destroyed all traces at that time."

Wang Min began to introduce the preliminary investigation.

"From the analysis of the fire point, the first place where the fire started was in the duty room where Zhang Yulin was sitting."

"It was caused by a short circuit in the electric kettle."

The kettle short-circuited?

"The fire started at around 2 o'clock in the morning, right?"

Chen Yan carefully observed in the ruins: "At that time, the kettle was still working?"

"I checked some information. The kettles of the Panshui Town Detective Team are all uniformly configured."

"This electric kettle can set the water temperature. Once the water temperature is lower than the set value, the electric kettle will start working."

Chen Yan nodded and continued to observe.

Chen Yan had studied the relevant files on the way.

The fire started at about 2:00 a.m. on the 5th.

The initial fire site was Zhang Yulin's office.

Next to the duty room was the gun room.

There were two pistols and 20 bullets in it.

There were also explosion-proof suits, shields, electric batons, handcuffs and other equipment.

None of these things were lost.

But they were all burned in the fire.

Electrical fires are different from ordinary fires.

Once they burn, if no measures are taken in time, the harm caused is very great.

The house of the Panshui Town Detective Team is a bungalow, and there are more combustibles on the roof.

In addition to the interior decoration and furniture, etc.

After the fire started, the fire was particularly large.

"Brother Wang, is the cause of Zhang Yulin's death confirmed?"

Wang Min nodded.

Chen Yan's question was also the first thing he wanted to know when he arrived at the Panshui Town Detective Team.

"The autopsy results show that Zhang Yulin died of suffocation due to smoke."

"There are no traumas on the body, and there are no signs of suffocation caused by other reasons."

Chen Yan knew that Wang Min meant that the autopsy results ruled out the possibility that Zhang Yulin was first suffocated to death by a machine and then burned by fire.

Suffocation caused by smoke is different from mechanical asphyxiation.

Smoke particles can be found in the lungs of the deceased, and even in the throat, there are signs of high temperature burns.

However, in mechanical asphyxiation, the neck of the deceased will have obvious corpse spots.

There will be no smoke particles in the lungs.

But how deep was Zhang Yulin's sleep?

According to the files, Zhang Yulin was lying on the bed when he was found.

There were also charred fiber materials on his body.

After analysis, it should be the cool quilt that the detective team has configured in the duty room.

Although the temperature in Yuecheng in January is not high, it is around 20 degrees Celsius all year round.

It is a tradition here to cover a summer cool quilt when sleeping at night.

These traces show that Zhang Yulin should have been sleeping peacefully in bed before he died.

Then he was choked to death.

But the problem is that during the process of smoke suffocation, people will wake up from deep sleep.

Even if they can't escape in the end, there must be signs of struggle at the beginning.

How could he die in bed?

"There is a ghost here!"

After listening to Chen Yan's judgment, Wang Min nodded.

As an old detective, Wang Min has much more experience in judging these scenes than Chen Yan.

Chen Yan can judge it, so Wang Min can naturally judge it: "There is indeed a problem."

"But the surveillance video at that time was burned in the fire."

"No evidence was left at the scene."

In the ruins, about 30 meters away from the duty room: "Here is the solitary confinement room at that time."

"Jin Nansheng was temporarily detained here that night."

The solitary confinement room is an enclosed room, equivalent to a temporary detention place.

There is a small window on one wall, which is protected by steel bars.

There is a steel sliding door on the front.

At this time, the door is still locked.

"The current situation is the scene after the fire that day."

"Jin Nansheng disappeared, the iron gate was locked, and the window was large enough for a person to climb out, but..."

Wang Min pointed to the steel bars on it: "Although the steel bars were twisted by the fire, there was no sign of damage."

"It is impossible for the other party to escape from the window."

"And that night, the key to the iron gate was in Zhang Yulin's duty room."

Interesting!

After Chen Yan entered the scene, he immediately opened the olfactory and visual gene locks.

More than a month has passed, and the scene was once doused with water because of fire fighting.

Traces...

It has been almost destroyed.

Except for the smell of charcoal after being burned and wetted by water, there are basically no other special discoveries in terms of smell.

"Is it possible to restore the equipment in the monitoring room?"

The file introduces that the equipment in the monitoring room was destroyed in the fire.

But hard drives are relatively strong after all.

Unless they are burned into molten iron, some information may be restored.

As a result, Wang Min shook his head: "The monitoring room is actually the duty room."

"After the fire, colleagues from the Serious Crime Squad of the Yunnan Provincial Detective Brigade did this work."

"But the monitoring computer was basically burned."

"The hard drive inside was completely destroyed, and there was no way to extract the video information."

Huh...

He slowly exhaled.

No wonder the people from the Yunnan Provincial Detective Brigade found nothing after a week of investigation.

The scene...

Nothing was left.

A big fire, a fire sprinkler, and a few rains later.

There was nothing left at the scene except a pile of debris.