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

Chapter 276 Sound Analysis
Wang Guojun's face was constantly changing, and the light in his eyes sometimes disappeared.

Chen Feng got up and handed Wang Guojun a cigarette.

"Think about it for yourself. I went out for a meal. I haven't eaten all day."

"Think it over, call me."

After Chen Feng finished speaking, he turned and left.

Although Chen Feng is not like the people in the criminal investigation detachment, he knows so much about the interrogation routines.

But to deal with these ordinary hooligans, there are some methods.

It's no use trying to tell them the truth.

frighten?

didn't work either.

These guys are hob meat who have been in prison several times.

Can't be scared at all.

Wang Guojun doesn't have any other relatives, only a sick old mother.

Then we can only start from this aspect.

Now, the Royal Army is clearly showing signs of letting go.

However, it is too late, sometimes, give him time to think alone.

Just as Chen Feng was about to leave the interrogation, Wang Guojun suddenly spoke.

"stop!"

Chen Feng turned around: "Have you figured it out?"

Wang Guojun shook his head: "I want to know, how did you determine that I tied Liubai?"

He arranged the whole process of committing the crime seamlessly.

How did Song Hui get exposed?
Did he betray himself?
It's impossible for Erpi and Xiaopang, these two people have been with him since the kidnapping.

Song Hui is the only flaw.

But why did Song Hui betray himself?

The 200 million gambling debt is not fake, it was made by Wang Guojun and other people.

For Song Hui, this business can only succeed, not fail.

After taking ten thousand steps back, Song Hui only knew that his name was Wang Huhu.

In the whole Haizhou, there are 80 people with this name, if not [-], right?
This is still my nickname.

Can't figure it out, can't figure it out at all.

It was precisely because he felt that his arrangement was perfect that Wang Guojun dared to go home to cook for his mother blatantly.

"Is it Song Hui?"

Chen Feng stopped and turned around. Wang Guojun stared at him with wide eyes.

"Not really."

With the information provided by Song Hui, it is indeed impossible to lock Wang Guojun.

At least, there is no way to lock it in a short time.

A professional portraitist had to be hired to make a portrait according to Song Hui's description, and then compare it.

This process cannot be completed in an hour or two.

"In the room where you and Song Hui kidnapped Liubai, there was a pinhole camera that secretly took pictures. We locked Song Hui through the candid video."

"As for you...the video didn't capture your face clearly, but you left fingerprints on the luggage cart that transported six hundred yuan. Our present criminal police have locked your identity based on fingerprint identification and analysis."

Candid video?

Fingerprint identification?

Wang Guojun has robbed and stolen, and studied criminal law in prison.

But sneak shots... what is it?
That's all for fingerprint identification, Wang Guojun knew what was going on when he was watching TV.

"What... secretly filming?"

Chen Feng did not speak, shook his head, and left the interrogation room.

The criminal police who recorded the record packed up the computer and left.

The process of locking the Royal Army was indeed a bit of a coincidence.

This can be regarded as evil comes with evil.

Currently surveying the office, Liu Guodong and Yang Sen Laobai are still studying the phone recording.

How did Lu Chuan accept the intermediate voiceprint identification and analysis skills rewarded by the system.

The identification and analysis of voiceprint requires the help of a special language graph instrument, the purpose of which is to convert the sound into a strip-shaped or curved image.

In voiceprint identification, this image is a rented language map.

In the process of human growth, due to the development of vocal cords, there will be a period of voice change from childhood to adolescence.

After the voice-changing period, the development of the vocal cords basically stagnates, and the adult voice is relatively unique.

When the vocal cords are not damaged by external forces, the voice remains relatively unchanged for a long time.

This long-term invariance endows the possibility of sound judicial identification.

Intermediate skill cards are loaded quickly.

But the detachment does not have a language map device for Lu Chuan to collect the voice in the phone recording.

Of course, collection is useless.

Wang Guojun has already been arrested, and the identification of the voice is meaningless now.

What Liu Guodong wanted was the ambient sound on the phone.

"Master, let me try."

Liu Guodong handed the phone to Lu Chuan: "See if you can find anything. You are young and have good ears. We old guys can't hear anything useful."

Lu Chuan nodded, took the phone, and pressed the play button.

Intermediate-level voiceprint identification and analysis skills, in addition to using the language graph instrument to determine the properties of the sound, more people use the human ear to listen to find different characteristics of the sound.

Otherwise, just buy a language graph instrument, and anyone can do voiceprint identification.

The actual situation is that human voices are all at a relatively fixed frequency. The voices of different people sound very different, but the data are all in a similar strip.

People without experience can't analyze it at all.

"Brother Bai, can you use your earphones for me?"

Lao Bai practiced his voice in the morning, and he liked to listen to Peking Opera during the day when he was free, so he got his own earphones.

Now comes in handy.

The earphones used by Lao Bai are relatively high-end, capable of wired and bluetooth.

Lu Chuan connected the bluetooth, put on the earphones, and the sound gradually amplified from the lowest level.

He put down the focus on the time period when Liubai was speaking.

When Liubai spoke, he did not change his voice through a transformer, and the recording of the surrounding sounds was more detailed.

What Lu Chuan has to do now is to layer the sound.

Deliberately ignore and weaken Liubai's voice.

This is very difficult for ordinary people or untrained people.

In the midst of loud noises, our minds tend to be more attracted to the loudest sounds.

There is a method similar to self-hypnosis in the voiceprint identification analysis of system rewards.

It can make Lu Chuan focus on the voice he wants to hear.

Putting on the earphones, Lu Chuan closed his eyes and completely immersed himself in the world in the earphones.

Liubai's voice was like an empty background sound, which was gradually blocked by Lu Chuan or deliberately ignored.

And all the energy is put on the weak part of the sound background.

Da da da.

The knocking sound of a non-explosive hammer?
woo woo woo woo……

Continuous beeping of the alarm.

Lu Chuan listened to the recording repeatedly, and took off the earphones after ten minutes.

"Xiao Lu? How are you doing?"

Lu Chuan raised his head and looked at Lao Bai, but because he had just adjusted the recording to the maximum for a long time, he didn't have a hearing test now.

It felt like Lao Bai's voice was coming from the sky.

Fortunately, I can hear clearly.

Lu Chuan shook his head, made an OK gesture, walked to his desk, took a big sip of water, and then recovered a little.

"It's a little rewarding."

"I heard a rattling sound in the recording, like the impact of a non-explosive hammer for decoration."

"And the sirens of the fire trucks."

(End of this chapter)