Coroner Ke Xue

Lin Xinyi was shocked by the news:

Although he knows that the prisoner's dilemma theory is indeed useful, and in actual detection, this interrogation method of separate interrogations, disintegrating trust, and stimulating competition is basically successful.

However, according to Lin Xinyi’s experience gained from working in the police force for several years:

The theory is easy to use, but it does not mean that the practical process is easy.

Because criminals who dare to join forces to commit major human life crimes usually have strong resistance, their interrogations often take hours or even days.

Just like using a network disk account without a membership to download hundreds of gigabytes of resources, interrogators must use extraordinary patience and meticulous and time-consuming work to break down the suspect's psychological defenses bit by bit.

And now, the two suspects, Kuroiwa and Kawashima, confessed in less than 20 minutes.

He didn't even resist

Even if you are determined to surrender, if you hold on for a little longer, you can force the other party to come up with better terms for the agreement, right?

Therefore, Lin Xinyi never expected that Kuroiwa and Kawashima would admit their guilt so quickly.

"This is too cooperative!"

He sighed deeply in his heart.

But this is because Lin Xinyi made an empiricist error, and there is no specific analysis of specific issues:

The basis for resisting the prisoner's dilemma is the mutual trust between multiple suspects in the criminal gang.

As for Kuroiwa and Kawashima, they had long turned against each other because of the election for village chief. Over the years, they had developed deep grudges and had no trust in each other.

In addition, a more important reason is:

While distrusting each other, Kuroiwa and Kawashima also have great distrust of Nishimoto Ken:

Ken Nishimoto quit the business two years ago due to psychological problems. In the past two years, he has been staying at home every day, turning his house into an abandoned house.

Every time he met with them, Ken Nishimoto wouldn't touch a certain pot, insisting on shouting crazy things like "Keiji Aso is still alive" and "Keiji Aso is here for revenge."

At that time, the police hadn't even arrived yet, so Ken Nishimoto scared himself crazy.

Now that the incident has been revealed and the police are here, can this coward still keep his mouth shut?

Anyway, Ken Nishimoto will definitely not be able to insist on confessing and confessing to them——

In this case, they might as well admit it early and seize the opportunity to be the first to plead guilty, surrender and have their sentences reduced.

Kuroiwa Tatsuji and Kawashima Hideo both thought so.

What they didn't expect was that the team's shortcoming they were most worried about turned out to be a stone in the pit that persisted until the end:

"No, I didn't kill anyone."

"Don't believe Kuroiwa and Kawashima's nonsense. I was only involved in the business, not the murder!"

"At that time, it was Heiyan and the others who threatened me to help give false evidence. That's all. The other things had nothing to do with me!"

Takeru Nishimoto's face was covered with big beads of sweat, but his mouth was even harder than before.

"How dare you talk so loudly when you are about to die?!"

"Kuroiwa and Kawashima have been guarded by people since they were arrested. There was no chance for them to collude with each other in advance."

"If they are interrogated separately, they all invariably accuse you of participating in the murder, and the details of what happened are consistent with each other."

"Then there is no doubt that you were involved in the murder!"

Lin Xin choked Nishimoto Ken back with just a few words.

But Ken Nishimoto was still there like a repeater: "No, I didn't kill anyone."

Lin Xin showed disdain, but quietly frowned:

Although the confessions of Kuroiwa and Kawashima were enough to convict Ken Nishimoto along with him.

However, in this kind of case, which has no physical evidence or clues and relies entirely on interrogation confessions, if there are obvious conflicts in the testimony of three people, it will not only be difficult to successfully conclude the case, but also cause fierce controversy in the subsequent conviction process.

“What a hassle”

Lin Xinyi's brows furrowed deeper and deeper.

And he also found that he seemed to have misjudged Nishimoto Ken's mental condition.

Although this guy has done too many bad things and feels guilty, he is afraid of ghosts rather than humans, and is afraid of divine punishment rather than human punishment.

He can be frightened into isolation by the imaginary "Keji Aso's evil spirit", but in front of the police, he can act cowardly yet strong, calm yet panicked, and his ability to withstand pressure is beyond imagination.

"It doesn't matter, Nishimoto Ken can't escape the crime anyway."

"I've done everything I can. I'd rather leave it to the professional interrogators and judges to sort out the testimonies and convict and sentence them."

Lin Xinyi thought about it and couldn't think of any way to make Nishimoto Ken confess his crime honestly.

He planned to retire just like that and leave the problems he couldn't solve to his colleagues in the Metropolitan Police Department.

At this time, the door of the interrogation room had just opened.

Asai Narumi's delicate face with a complicated expression suddenly appeared in front of Lin Xinyi:

"Mr. Lin."

"The police officers you sent out to investigate found evidence that my father left behind in the village."

"Did you really find evidence?" Lin Xinyi was a little surprised.

He sent police officers to Yueying Island to visit and investigate, just to try his luck and not have much confidence.

Unexpectedly, after 12 years, there is actually evidence that has survived:

"Yes, the evidence was obtained from the only serving veteran policeman at Yueying Island Police Station during the investigation."

"The police from the Tokyo Metropolitan Police Department did not investigate the fire scene, but the police officer from the island police station found a safe that was not damaged by the fire from the ruins of my house."

"There's nothing else in the safe except a sheet of music."

"And that piece of music score has been kept in the office by the policeman grandpa."

As he spoke, Asai took out a thin sheet of music that had been kept in a plastic evidence bag.

He held the sheet of music gently and his eyes became deep:

"This is not an ordinary piece of music, but a suicide note that my father left for me in code before he died."

"He taught me this secret code that corresponds to the Roman letters and the piano keyboard before, so I can understand it:"

"In the suicide note left before his death, my father had already written clearly the reasons and process of the four demons locking them in the house and setting them on fire."

"This is the evidence he left for us at the last moment of his life."

"Mr. Lin Xinyi, with this suicide note, those evildoers should be punished, right?"

Asai Narumi gently handed over the sheet music and looked at Lin Xinyi with eyes full of expectation and gratitude.

Lin Xinyi took the mottled and yellowed sheet of music and looked at it carefully.

Seeing all the traces left on the music score, his expression gradually became solemn:

"Well, I definitely will!"

"Now both Kuroiwa and Kawashima have confessed."

"With their testimony and this suicide note, there is no chance of this case being overturned!"

The testimony obtained during the interrogation alone was enough to convict the three of them.

Now that this crucial evidence is found, the physical evidence and testimony are combined, and the case becomes completely irreversible.

"Ken Nishimoto! What else do you have to say?"

"With all the testimonies and evidence, do you think you can continue to carry on?"

Lin Xinyi looked sharply at Takeshi Nishimoto, the murderer who still refuses to let go.

"I" Ken Nishimoto's face was extremely ugly.

But he now knows that he has been one step behind Kuroiwa and Kawashima in the competition, and has lost the opportunity to surrender and reduce his sentence.

Therefore, this guy broke the rules and became unwilling to let go:

"S-What did you say?"

“What can a sheet of music say?”

"How do you prove that this sheet of music was left by Keiji Aso?"

"It took 12 years to come up with such a piece of music. Do you think it's a suicide note?"

Ken Nishimoto jumped over the wall and even questioned the authenticity of the evidence.

And he was very confident in his doubts:

The music score had been kept secretly by the old policeman for the past 12 years. There were procedural violations, and its reliability was questionable upon closer inspection. As long as you have money to hire a powerful lawyer, this kind of evidence is not evidence.

Keiji Aso's home was burned to the ground. After so many years, it is unrealistic to find the words he wrote back then for handwriting identification.

Nishimoto Ken refused to admit it, but Lin Xinyi coldly showed the music score in front of him:

"You want to ask me how to prove that this is a suicide note written by Keiji Aso?"

"Did you see it? There are many yellow-brown spots on these yellowed papers?"

"Mr. Nishimoto, what do you think this could be?"

"This" Ken Nishimoto's expression froze.

But Lin Xinyi's cold eyes were filled with angry flames:

"You four shouldn't have just locked people into the house and set them on fire, right?"

"After all, Keiji Aso is a grown man."

"In order to protect his wife and daughter, it is impossible for him not to resist when facing the murderer."

"So, before locking Keiji Aso into the house, you may have had a fight with him and severely injured him, and possibly even his wife and daughter!"

"As for Mr. Keiji Aso, his house was set on fire and he was seriously injured and unable to walk."

"I dragged my broken body and tried my best to leave such a suicide note in the fire!"

"That was his last sound—"

"His voice is not only written in the code of notes, but also imprinted in these inconspicuous traces!"

Lin Xinyi's angry roar made Nishimoto Ken turn pale:

"Could it be that the yellow-brown stains on the music score are"

"is blood."

"The old blood stains on the paper object are this color."

"At that time, Keiji Aso was seriously injured. In the process of desperately writing this score, he also left his own blood on the score."

"The blood fell on the paper to form droplets. Some of the blood drops were touched by the palm of the writing hand, forming a wipe-like blood stain on the paper."

"There are also some blood drops that are stained by the tip of the pen, leaving bloody words when writing."

"The presence of these two wipe-like blood stains is enough to prove that the blood dripped when the suicide note was written."

"And taking these bloodstains for DNA testing is enough to prove that the person who wrote the suicide note is Keiji Aso himself!"

Lin Xinyi told the truth righteously, completely dispelling Nishimoto Takeru's illusions.

DNA samples of the deceased can be extracted from the bones of the corpse, or the deceased's son, Asai Narumi, can be directly asked to provide DNA for comparison.

The DNA identification of old bloodstains from 12 years ago should be quite difficult in this era.

I don’t know if the current DNA identification technology of Kesouyan can be realized.

But just like the last time I scared the tram stop murderer

Regardless of whether the current technology can do it or not, we should first use it to scare people.

"Mr. Aso has exposed your lies with the voice he left behind in his life."

"Nishimoto Ken, what else do you have to argue with now?!"

Lin Xinyi glared at him with a terrifying aura.

Ken Nishimoto's psychological defense finally collapsed completely at this moment:

"I plead guilty."