Chapter 527 Serial Murder Case (Big Update Please Vote!)

The atmosphere in the car was silent for a while.

Both Chen Yan and Li Hong have a deep understanding of Wang Fenglei's feelings.

Some cases, if not solved, are like a fish bone stuck in the throat forever.

When you take a breath, it pricks your nerves.

But returning to the case itself, Chen Yan still has a question.

"Team Wang, I have a question that I don't quite understand."

"So many years have passed since the case, and there is such a long gap between them. Why do you think this is a serial murder case?"

"How do you know that the other person is the same person?"

"Taxi drivers were killed. In terms of probability, especially more than ten years ago, there were probably similar cases every year in every city."

"How did you know that the other party was a serial killer?"

"Also, ten years have passed since the case that happened last night and the last time the murderer committed a crime. How can we be sure that the other person is the serial murderer of that year?"

Chen Yan's question is not unreasonable.

More than ten years ago, the murder of taxi drivers was one of the most common types of robbery and homicide cases.

As Wang Fenglei said, mobile payment had not yet emerged more than ten years ago, and taxi drivers only collected cash.

Such a group that always has cash in their hands is naturally the target of many vicious criminals.

When I was in the police academy, the professor specifically talked about this data.

In large cities like Liancheng and Shenshi, more than ten years ago, more than one or two taxi drivers had accidents in a year.

But why is Wang Fenglei so sure that these cases were committed by the same murderer?

In addition, if someone else imitates the crime, is it possible?

Wang Fenglei gave the answer.

"Because of the murder weapon!"

"The murder weapon?"

"Yes, it's the murder weapon!"

"Fifteen years ago, there were even a total of six murders, two of which were taxi drivers who were robbed and killed."

"However, except for this serial murder case, the other five murder cases were all solved that year."

"In the following years, although there were successive cases of taxi drivers being robbed and killed, they were all solved one after another, and there were no unsolved cases."

"There are only those four cases without any clues, and the four murdered drivers were all killed with the same murder weapon."

"What weapon?"

"Probe!"

"Probe?"

Faced with Chen Yan's doubts, Wang Fenglei did not introduce it in detail.

"It's hard to explain exactly. Just turn a corner and you'll reach the scene. You'll understand it when you get there."

After the car drove out of the airport, it did not go directly to the city, but went straight to the scene.

"Is this an abandoned factory area?"

Wang Fenglei nodded: "Yes, this place was originally a cement processing plant. It was moved out five years ago due to environmental pollution problems. It is now vacant. This is where we found the murdered taxi driver."

The car turned the corner and saw tall weeds.

There has been no human habitation in five years, and the original cement factory has become overgrown with weeds.

The car was driving on the cement road, less than 100 meters away, when we saw the warning line.

A group of detectives are investigating the scene.

"Chen Yan, get out of the car. This is the crime scene."

After getting out of the car, Chen Yan first put on his gloves and ankle boots. Liu Qingshan and others behind him did the same and walked into the scene.

There are weeds half as high as a person on the concrete roadside. It is summer and the grass is tender green with obvious tire marks on it.

Passing through more than 20 meters of grass, there is an open sandy field. A yellow and green taxi is parked in the middle of the sandy field.

Because it is full of sand and gravel, there are very few weeds here, just a few scattered around.

Five detectives responsible for on-site investigation are at work.

"You guys take a rest first, Team Leader Chen is already here."

These detectives were all members of the Shen City Detective Team. After Wang Fenglei and Chen Yan arrived at the scene, they asked these people to rest first.

"Chen Yan, I'm personally watching this case. You go to the scene first, and I'll give you the basic information."

Chen Yan nodded. According to normal procedures, this case should not be led by Wang Fenglei himself.

Because Wang Fenglei's current position is not only the captain of the Shen City Detective Team, he is also the deputy captain of the Liao Provincial Detective Brigade.

With his level, he no longer has to personally lead the investigation of the case.

However, this case is part of a series of cases. Wang Fenglei has handled this case before, and now no one can stop him from participating in the investigation personally.

In the car, Chen Yan knew that the case back then had become Wang Fenglei's heart.

Just like his master, the resigned captain, told him when he retired, this case must be investigated.

In fact, Cao An, the captain back then, just took the blame.

Without his resignation, Wang Fenglei's career would have ended ten years ago.

Entering the taxi, Chen Yan immediately opened the olfactory and visual gene locks.

Wang Fenglei followed Chen Yan and introduced the basic situation.

Regarding this case, Wang Fenglei knew that it would probably still be impossible to solve it on his own.

I couldn't figure it out ten years ago, so it's unlikely that I can detect it now.

Although the technical means of solving crimes have improved a lot compared with ten years ago, solving the case cannot be solved by technology alone: ​​"The reporter is the wife of the taxi driver, and the taxi driver is a night shift driver."

"Night-shift taxi drivers in Shen City usually pick up the taxi at 5 p.m. and return it at 6 a.m. the next day."

Wang Fenglei is very familiar with the taxi industry in Shen City: "Of course, some drivers have their own agreed time, but probably the night shift drivers will pick up the taxi before the evening peak and hand it over to the day shift driver before the morning peak."

In this way, both day shift and night shift drivers have peak hours, and the difference in money earned is not very big.

"The taxi driver was supposed to deliver the taxi to the day shift driver at 6 o'clock this morning, but the taxi driver did not wait for the taxi and did not answer the phone. The day shift driver contacted the night shift driver's wife."

"The other party called the police at 9 o'clock this morning. We contacted the taxi company and retrieved the vehicle's positioning system. We found the taxi and the murdered driver in the factory area, and that's when we discovered the taxi."

While listening to Wang Fenglei's introduction, Chen Yan carefully observed everything in the car.

The driver was lying on the steering wheel in the driver's seat, and there was a lot of blood in the car.

Observing carefully from the passenger seat, Chen Yan finally understood what Wang Fenglei was talking about with the probe committing the crime.

There was a probe in the deceased's right carotid artery, connected to a hose under the driver's seat.

The sharp part of the probe was completely inserted into the carotid artery of the deceased.

"In previous cases, the murderer used similar modus operandi?"

Wang Fenglei nodded: "Exactly the same!"

"Not only the modus operandi, but also the probes and hoses used are exactly the same as those ten years ago!"

Chen Yan frowned.

Use a probe to bleed, causing death...

This modus operandi is very special in itself.

The other party actually used the same probe and hose to commit the crime ten years ago. Why?

Demonstrate to the detectives handling the case?

Or is it obsessive-compulsive disorder, or some other reason?

This modus operandi is unusual.

Generally speaking, it is impossible for a taxi driver to be bled quietly by the other party. He must resist, but there is no trace of resistance in the car.

The deceased's clothes were neatly dressed, and the hanger on the bridge was not displaced or damaged at all.

Did the murderer bleed the driver after subduing him?

【Ding! The strongest police training system mission is released. 】

[Detect the serial murder case of taxi drivers in Shen City. The deadline is five days. Complete the task and you will be rewarded with a second cell enhancement. If you fail or exceed the deadline, the task reward will be cancelled. 】

The system beep in his ear did not interrupt Chen Yan's thoughts.

Transferring to the main driver, Chen Yan squatted on the ground and carefully observed the blood volume in the driver's seat.

The driver's feet were already covered in blood. Chen Yan lightly touched a little blood and rubbed it gently. The blood was thick but not completely coagulated.

Taking into consideration the degree of rigor mortis, blood coagulation, temperature and other factors of the deceased, it was comprehensively judged that the time of death of the deceased did not exceed eight hours.

It is already 12:30 noon, which means that the deceased should have died around 4:30 in the morning.

All four car doors had been opened, and Chen Yan looked around in circles.

In addition to the pungent smell of blood, there was also a strong smell of alcohol in the car.

The smell of alcohol was very strong. It didn't look like it was left by a drunk passenger, but it looked like someone had specially sprayed the car with alcohol.

Other than that, there is no other smell in the cabin.

Chen Yan frowned deeply, and the other party was very cautious.

After the car was disinfected with alcohol, other odors were basically eliminated. Chen Yan's olfactory gene lock found nothing special.

This is the first time Chen Yan has encountered such a situation. If this was planned by the murderer in advance, then this person would be terrible.

In addition, the visual gene lock also found nothing.

Chen Yan found no traces of fingerprints on the door handles, steering wheel, or door armrests.

"Team Wang, have your fingerprints been collected?"

Although Chen Yan's visual gene lock is powerful, there is a strict process for collecting fingerprints. If you can't see it, it doesn't mean it doesn't exist.

Fingerprint collection is usually carried out in a secret room indoors, using special lighting, and then taking photos to collect fingerprints.

However, although this method is accurate, it can only be used to collect evidence fingerprints of small objects.

Naturally, it is impossible to move something like a taxi into a secret room. It can only be developed with chemical spray and then collected with stickers.

As a result, Wang Fenglei shook his head: "No fingerprints were collected!"

"In this case, we immediately judged that it was committed by the murderer ten years ago. The weapon used and the killing method were on the one hand, and the handling of the scene on the other hand."

"This was the case with the first case that the other party started fifteen years ago. The other party used alcohol to disinfect the car without leaving any valuable smell. We even deployed police dogs at the time, but we still didn't have any clues."

"There are also fingerprints. From the first case, we have not extracted any fingerprints."

"The murderer not only sprayed alcohol to eliminate the odor, but also wiped the entire car, including the seats, armrests and even the steering wheel, handbrake lever, glass, etc. in the car."

"There are also no fingerprints on the door handles on the outside of the vehicle. These details were kept confidential when the case was solved and have never been leaked. That's why I concluded that the murderer of this attack was the serial murderer ten years ago. !”

call!

clean!

Chen Yan can only describe the murderer's methods as clean.

No fingerprints, no hair, not even a smell!

Although the other party didn't know that Chen Yan was very sensitive to smell, the other party obviously considered the situation of the police dog.

No wonder this serial case has not been solved for fifteen years.

You must know that the entire Liao Province Detective Brigade and the Shen City Detective Team are definitely among the most elite in the province in terms of ability and quality.

Wang Fenglei was a star figure in the Liao Provincial Detective Brigade back then, otherwise he would not have become the deputy captain of the Liao Provincial Detective Brigade at the age of less than fifty.

None of these people are fuel-efficient.

And so many people have not solved the case for more than ten years. This shows that it is not a problem of ability, but that the murderer is indeed very cunning.

To be honest, this was the first time Chen Yan encountered such a situation.

There was no trace of a taxi at the crime scene. There were no fingerprints, skin flakes, or hair. The personal odor had also been removed by alcohol.

However, even if the murderer leaves no personal traces, there are situations where state evidence cannot be eliminated if the murderer wants to.

For example, the status of the meter.

The vehicle meter is currently empty, and there are no fingerprints on it.

What does this mean?

Normally, only drivers will touch taxi meters, and passengers generally will not touch them.

However, the current status of the meter is empty. Why?

Judging from the state of death of the deceased, it is certain that the murderer must be the last passenger.

After subduing the driver by some means, he killed the driver by bleeding with a probe.

So, in the process of the driver being killed, is it possible to adjust the meter by yourself from the metering state to the empty state?

impossible.

Anyone who has ever taken a taxi knows that taxi drivers usually only adjust the meter to empty status after the passengers pay and leave the taxi.

Therefore, this meter can only be adjusted by the murderer.

The murderer had adjusted the meter and left traces on it, so he cleaned the fingerprints on the meter and could not extract any fingerprints from the meter. Otherwise, at least the driver's fingerprints would be on it. .

So why did the murderer adjust the meter?

There is only one possibility: the other party is concealing the distance of his ride.

The starting price of a taxi in Shen City is ten yuan, and the starting mileage is three kilometers.

For each kilometer exceeded, the price is 1.6 yuan.

Therefore, as long as you know the last amount displayed on the meter, you can delineate the distance range where the murderer appeared centered on the crime scene.

As for the vehicle positioning system, all taxis in Shen City were installed only five years ago.

However, the system installed on the taxi can only locate the vehicle's last stop location and cannot query the trajectory.

In this way, it is difficult to determine when and where the murderer got in the car.

Fortunately, there is already a Sky Eye system, and we may be able to make some discoveries in this regard.

In addition to the meter, there is also a handbrake lever.

Chen Yan just tried to pull the handbrake and found that the handbrake was very tight and had been pulled to the limit.

This situation is problematic.

Because ordinary experienced drivers will not do this, tightening the handbrake too tightly will cause metal fatigue of the handbrake cable and affect its service life.

Generally, experienced drivers will pull down the handbrake to an appropriate position, which not only ensures that the car does not roll away, but also maximizes the service life of the handbrake cable.

There is no reason why taxi drivers don’t know things that experienced drivers know.

So, the murderer pulled the handbrake of the vehicle?

Leaning down, Chen Yan looked carefully and then looked at Wang Fenglei: "There are no fingerprints collected on the handbrake lever, right?"

Sure enough, Wang Fenglei shook his head: "No."

A handbrake handle that only the driver can touch has also been cleaned of fingerprints, which means that the murderer did touch the handbrake handle.

But why?

To prevent the car from slipping?

Or did you drive the car away to prevent the driver from resisting when he was killed?

Taking two steps back, Chen Yan kept a certain distance away from the vehicle and continued to observe.

Wang Fenglei had just told Chen Yan the general story of the four previous cases carried out by the murderer. It was exactly the same as this time, and no information was left behind.

call!

Chen Yan let out a breath and frowned.

This was the first time that Chen Yan encountered such a murderer.

There's really nothing left.

However, if this is really the case, even if the murderer is caught, what evidence will be used to convict him?

No!

impossible!

The murderer will definitely leave information, and it is impossible to eliminate it 100%. Otherwise, what is the difference between this and a perfect crime?

In this world, there is no perfect crime.

So, where is the flaw?

Chen Yan, who was squatting on the ground, felt some numbness in his legs. Just as he was about to get up, he suddenly caught a glimpse of the driver's body lying on the steering wheel in the driver's seat.

Something is wrong here!