Wrong Interrogation Room, The First Cracked Case Shocked the World

Ning Cheng's temperament has changed.

A smile appeared on the corner of his mouth, not cold.

But it looks so weird!

Zhang Dongyang, who had just stood up in anger, was stunned for a moment, and his flushed face collapsed.

Staring at the weird and nervous smile at the corner of Ning Cheng's mouth, he involuntarily took a few steps back.

It feels like a lone wolf meets a tiger at the top of the food chain.

As a murderer, if you meet a more perverted murderer, you can only be played!

What the hell is going on here?

A big question mark suddenly appeared in Zhang Dongyang's mind.

Looking at Zhang Dongyang's stunned expression, Ning Cheng's strange smile grew stronger.

As early as the second time he was going through the archives, Ning Cheng had a bold idea.

Since it is difficult to find evidence of Zhang Dongyang's murder by traditional methods.

Then it is better to overwhelm Zhang Dongyang's psychological defense line and force Zhang Dongyang to speak out!

However, Zhang Dongyang was able to plan such a case, and he was able to withstand repeated bombing and inquiries by the police. His psychological quality was extraordinary.

So Ning Cheng had no choice but to break out of the conventional method and use performance!

With world-class acting experience, Ning Cheng is fully capable of this approach without fear of being seen through!

At this moment, not only Zhang Dongyang was dumbfounded, but his body was so frightened that he stepped back.

Outside the monitoring screen in the interrogation room of Group A, the detectives of the Criminal Police Team were also bewildered.

Looking at Ning Cheng's strange and perverted murderer's temperament, he couldn't help swallowing.

"Team Zhou, what's the origin of this Ning Cheng, is he a policeman?"

The big and strong policeman up to 1.8 tad took a deep breath and shuddered:

"How do I feel that Ning Cheng is scarier than any murderer I've ever caught!"

"It was the murderer who killed a family of six the year before. In front of Ning Cheng, he felt like a younger brother."

"Huh, I think Ning Cheng's temperament is like Hannibal!"

Zhou Ze let out a breath, looked at the display and said:

"Ning Cheng must be a policeman. There is no doubt about that. It is estimated that he is selling some medicine in the gourd. Let's keep reading and talk about it!"

..........

The interrogation room is bright.

However, Zhang Dongyang felt that he was in a dark night where he could not see his fingers, and would be swallowed up by the more terrifying Ning Cheng at any time.

"Who are you?" Zhang Dongyang asked loudly.

"I'm Ning Cheng, the one called by the police to deal with you!" Ning Cheng whispered.

"You're not a policeman?"

"Do you think I look like a policeman?"

Ning Cheng sat on the seat and stared at Zhang Dongyang lightly: "We are the same kind, but I am more terrifying than you!"

"I know you murdered your wife, Li Mei'er!"

"I didn't kill anyone, don't play tricks here!"

Zhang Dongyang stared straight at Ning Cheng's eyes and forced himself to calm down.

But even if he had guesses in his heart, it was all fake, but his body still trembled and panicked involuntarily.

"Oh?" Ning Cheng chuckled lightly: "You didn't kill anyone, why are you in the police interrogation room?"

"I was summoned to answer my wife Li Mei'er and her lover's situation."

Zhang Dongyang felt that he gradually regained his sanity, and he was not so afraid, and said loudly:

"My wife betrayed me and left with her lover. I'll report it to the police."

"You believe in this nonsense yourself?"

Ning Cheng glanced at Zhang Dongyang's trembling fingers, slowly picked up a pack of cigarettes on the table, and pulled out a Hua Zi said:

"The index finger and middle finger of your right hand are slightly browned. It looks like an old smoking gun. Would you like one?"

"I do not want!"

Zhang Dongyang stared at Ning Cheng, pointed at the monitor and hissed:

"Don't pretend, I know you are a policeman, do you know that you are suspected of inducement, where is there surveillance, what I said has no legal effect in this case!"

"Whether I am a policeman or not, as you think, but it seems that you know the law very well~"

"But the more so, the more I doubt you!"

Ning Cheng smiled leisurely, and his suspicion of Zhang Dongyang deepened.

How can ordinary people know the police's interrogation process, and they are so clear about the law?

Zhang Dongyang must have made preparations!

If Zhang Dongyang hadn't had a ghost in his heart, would he still know the Fa as a middle school teacher?

"Crack!"

Inside the interrogation room, a wisp of flames rose.

The lighter clicked and lit the cigarette. Ning Cheng did not smoke, but put the cigarette on the edge of the table and let it burn out.

"Do you believe it, in the time of this cigarette, I can make you confess your guilt!"

Zhang Dongyang's body has recovered and he no longer trembles.

But this time.

Hearing Ning Cheng's voice and the confident smile at the corner of his mouth, his body shuddered suddenly.

The scarlet cigarette butts raised faint white smoke, which filled the interrogation room, causing Zhang Dongyang's heart to be numb.

Ning Cheng never smoked, and looked at the smoke with a perverted and intoxicated expression.

"Zhang Dongyang, your wife Li Mei'er was killed by you in the room, right?"

"No, I didn't kill anyone!"

Zhang Dongyang said angrily, "You guys have already started a street-stall search at my house. If I killed my wife at home, where did her body go?"

"Your forensic test has been done, and there is no blood in my house!"

Outside the surveillance room, Zhou Ze and other detectives frowned secretly.

The strong criminal policeman smiled coldly and said, "Pretending to be smart! Did that Ning Cheng think we couldn't think of it?"

"If Zhang Dongyang killed people at home, how could there be no blood stains on the indoor floor and walls?"

"As long as blood stains are left, why can't the forensic doctor use the luminol reagent to test it?"

Luminol reagent is a blood test commonly used by modern forensics to judge the murder scene.

Using the chemical reaction of the luminol reagent, as long as there is a little human blood on the floor, even if it is a few years old, it can be detected.

And the chemical reaction of luminol reagent is extremely difficult to eliminate.

Ordinary people can't solve this problem by searching on the Internet.

Because online methods can only alleviate the luminol reaction, not eliminate it.

"There are no bloodstains in your home because the bloodstains from the murders in your home have been removed."

Ning Cheng said lightly: "Luminol reagent is a common method for forensics, because the chemical properties are difficult to eliminate, even if you search on the Internet, it is difficult to find the elimination method!"

"But you Zhang Dongyang is a chemistry teacher. It's not difficult to clear the luminol reagent, right?"

"Just use a high concentration of sodium hypochlorite to destroy the mutated DNA and blood proteins, then use disodium EDA to thoroughly couple the metal ions in the blood, remove the iron ions, and then rinse with water.

Doing so completely eliminates the blood, which in turn prevents the luminol reagent from chemically reacting with the blood! "

Zhang Dongyang froze in place, completely stunned.

How on earth did Ning Cheng know that he had eliminated the luminol reaction by doing this.

Outside the monitoring screen, many criminal police officers looked at each other, completely dumbfounded.

Ning Cheng's idea was something they didn't consider!

And Zhang Dongyang's career.

for time reasons.

The police didn't have time to investigate and visit Zhang Dongyang's school, and only knew from Zhang Dongyang's mouth that he was a teacher, but did not know the specific subjects he taught.

How did Ning Cheng know that Zhang Dongyang taught chemistry?

Zhou Ze, the captain of the criminal police detachment, took a deep breath and immediately ordered:

"Call the forensic department in the city and ask if the Luminol reaction can be resolved according to Ning Cheng's method!"

"And call Zhang Dongyang's school and ask if Zhang Dongyang teaches chemistry?"

The two phone calls were quickly made, and it didn't take long for them to be answered in the affirmative.

"Team Zhou, the forensic department said that according to Ning Cheng's method, the blood stains can be eliminated and the luminol reaction can be eliminated."

"Team Zhou, I have sent it to Zhang Dongyang School. Zhang Dongyang is indeed teaching chemistry."

Two voices resounded clearly in the monitoring room.

Numerous criminal policemen stared blankly at Ning Cheng in the surveillance video.

Is this still a trainee police officer?

Obviously so handsome, yet so dignified, to steal their jobs!

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But now, according to the ideas given by Ning Cheng, it can be determined that Zhang Dongyang is suspected of murder. .