The concept of the prisoner's dilemma is familiar to many people, so I won't outline it much.

In short, just like everyone knows that the price of rushing to buy a house will rise, and the price of not buying a house together will fall, but most people are still worried that they will lose money if they get on the bus late, so they rush to buy a house...

The more people in a collective, the easier it is for the theory of the prisoner's dilemma to succeed.

Now, the good news is that there are three suspects in this case.

It is difficult to maintain the mutual trust between the three people, and the psychological pressure after separate interrogations will be more than ten times that of the two-person model.

"Take Ken Nishimoto, Tatsuji Kuroiwa, and Hideo Kawashima to three rooms and interrogate them separately."

"Tell them that the first person to confess is considered to have a major voluntary surrender and can get a great reduction in sentence."

"The second person who admits guilt is also considered to have surrendered, and the sentence can be appropriately commuted."

"The last person to admit guilt directly convicted him of the murder and increased the sentence."

Such an operation is actually a violation, but it is not impossible.

If the police and the first two prisoners reach a private agreement and directly put the hat of the main offender on the third person, it is indeed possible to let the last prisoner who pleads guilty to share part of the crime for the other two and carry the biggest pot on his back.

"In short, the sooner you confess, the better, and the later you confess, the worse it is."

"And other than that, remember to keep the three rooms apart, and never let them know what is going on with each other!"

Lin Xinyi assigned tasks to those police officers, preparing to strike while the iron was hot, and carry out interrogation on the scene on this Moon Shadow Island.

Today's visit is not a search class dedicated to criminal investigation, but a security class with SAT SWAT as the main focus.

However, the Fourth Division, which is responsible for the search of group violent crimes, and the Drug Weapon Countermeasures Division, which is responsible for the seizure work, also participated in the operation.

They deal with violent gangs and trafficking syndicates every day, and they are very good at interrogation.

It's easy to help solve the trial of a murder case.

"Each suspect is assigned two interrogators, and everyone understands how to interrogate."

"By the way, I also participated in Ken Nishimoto's interrogation."

Lin Xinyi also specially arranged a position as an interrogator for himself.

Because Asai told him:

Among the three of Nishimoto, Kuroiwa, and Kawashima, this Nishimoto Ken has the worst mentality.

He has been a Shinto and muddled man since the mysterious death of Kameyama two years ago, and the legend of the curse of "Moonlight" spread on the island.

He didn't even dare to do the food business, and stayed at home all day long, worrying that the "resurrected Keiji Aso" would come to take revenge.

Therefore, Lin Xinyi feels that this Ken Nishimoto will definitely be able to become a breakthrough in this case.

"And, Miss Maori."

Lin Xinyi turned his head again and beckoned his good student.

It's still a holiday, and as a student and assistant, Mao Lilan also followed Lin Xinyi to Moon Shadow Island this time.

And because there is really no more reliable assistant in the identification class, Lin Xinyi is also used to letting Mao Lilan, who has been by his side, assist him in his work:

"Miss Maori, you're waiting outside for the interrogation."

"After twenty minutes or so, if the interrogation is still inconclusive, you knock on the door and come in in the posture of a formal policewoman, and say to me:"

"'Officer Lin, Officer XX has something important to communicate with you'."

"Then, in front of that Nishimoto Ken, you asked me to go out with you."

"Hmm." Mao Lilan nodded smartly: "I understand." ”

Without Lin Xinyi's explanation, she can also understand the intention of this arrangement:

"Mr. Lin, this is a trick used to disrupt the suspect's mind, right?"

"That's right." Lin Xin nodded:

Although the theory of the prisoner's dilemma sounds powerful, in practice, it is not easy to trap opponents.

Because reality is not the ideal model after all, as it is now... The three suspects should know very well in their hearts that it is difficult for the police to find clues to a 12-year-old unsolved case.

In this kind of situation, knowing that if they bite to death, there is a high probability that they can get away with it, and the resistance of the three of them will be much firmer.

At this time, just like Lin Xinyi had just arranged, he needed to use some small tricks to disturb the enemy's mind.

Although this trick is simple and crude, it can't be studied in detail.

But for a person who is already under great psychological pressure, it can have a great effect.

"That's right... In addition to interrogation, investigations through other avenues must not be relaxed. ”

"Although it has been 12 years and the investigation is very difficult, we still have to actively visit the islanders who have an impression of the case to see if we can find clues to help solve the case."

"It would be great if there was any useful evidence to be found."

Carefully arranging everything, Lin Xinyi kicked off the action:

"Now, then, let's start the interrogation!"

.................................

Soon after.

Moon Shadow Island Village Office, in a temporarily requisitioned interrogation room.

Ken Nishimoto, a middle-aged man with messy hair, wrinkled clothes, and a somewhat sloppy person.

At this moment, facing Lin Xinyi as an interrogator, his reaction was very ugly:

His eyes are evasive and he does not dare to make eye contact with people.

His eyebrows were drawn and his lips were pursed, as if he was scared and thoughtful.

The legs were tightly tucked under the chair, and the two hands seemed to have nowhere to place, holding the armrests at one time and resting on their legs.

You don't need to learn any micro-expressions, Lin Xinyi can also know that this guy is very panicked.

"Mr. Nishimoto, are you still refusing to confess?"

"You must know that the interrogation of Kuroiwa and Kawashima is also going on at the same time, and we don't know the situation on their side."

"If you confess your sins one step behind them, I'm afraid you'll suffer a big loss!"

"Why, are you so confident in them that you think they won't betray you?"

The other interrogator who was partnered with Lin Xinyi was in charge of singing blackfaces, and said in a cold tone.

And Lin Xinyi played a good policeman and played the emotional card with Ken Nishimoto:

"Mr. Nishimoto, stop resisting."

"I've inquired, you were a very good friend with Keiji Aso back then."

"If you kill your friends for the sake of profit, even if it's you, you probably can't bear such a crime, right?"

"Otherwise, you wouldn't have been so messy in the past two years."

"So, don't go on like this..."

"You can't get out of the shadow of those sins at all, and how much better is it to live like a walking corpse than to go to prison?"

Lin Xin knew that he was emotional, moved by reason, and persuaded Nishimoto Ken to bow his head and surrender from another angle.

"I—" The corners of Nishimoto's mouth twitched, obviously touched.

But he still didn't want to admit the crime of murder, and still insisted on not letting go.

Of course, he was hesitating in his heart... Is your persistence really meaningful?

Could the other two guys have already teamed up to sell him and let him carry the black cauldron of the main culprit?

Time passed slowly amid the cold scolds and patient counsel of the two inquisitors, as well as Ken Nishimoto's repeated entanglement, suspicion, and panic.

Soon, almost twenty minutes passed.

Bang bang bang.

As agreed, there was a soft knock on the door of the interrogation room.

"Please come in."

The door was pushed open, and it was really Lin Xinyi's actor arranged in advance, Mao Lilan.

Every time she comes out to handle a case with Lin Xinyi now, she will consciously change the high school uniform, which looks very immature, into a suit and skirt that is mature and formal after all.

Changing into this set of dark suits and skirts of "social people", coupled with the capable temperament cultivated by practicing karate all year round, even if the facial features are still a little young and immature, the overall look can look like a mature and capable female police officer.

"Forest Officer."

As soon as Mao Lilan came in, he greeted Lin Xinyi very formally.

Lin Xinyi was very satisfied with her appearance, temperament, and acting skills, so he naturally picked up the play:

"Maori Patrol, what's the matter?"

"Yes." Maolilan nodded.

However, the lines she read out were completely different from those arranged by Lin Xinyi:

"News came from the other two interrogation rooms that Kawashima and Kuroiwa had confessed."

"They have always been at odds with each other, with deep contradictions, and infighting for many years."

"After entering the interrogation room, they both couldn't trust each other, fearing that the other party would betray themselves and confess before they could turn themselves in."

"So, not long after entering the interrogation room, Kawashima and Kuroiwa both bowed their heads and confessed."

"Uh..."Lin Xinyi was stunned when he heard it:

He taught Mao Lilan a word, why did he pop up so much now?

Playing on the spot? The details are quite similar.

But that's not going to work...

Interrogation and inducement of confessions are like licking a dog, and only when the words are ambiguous and ambiguous can people feel unsettled.

You spoke in such detail, and you made it clear that the opportunity to confess first had been taken by Kawashima and Kuroiwa, how could this make people confess their guilt obediently?

"Ugh..."

Seeing that Mao Lilan not acted as planned, but let himself go out of the plot, Lin Xinyi was very uncomfortable.

He had no choice but to bite the bullet and pick it up:

"Okay, that's great!"

"Mr. Nishimoto, both of your accomplices have already pleaded guilty, what are you still insisting on?"

"Let's tell the truth quickly..."

"What a joke!" Ken Nishimoto hissed with an ugly face.

"I didn't kill anyone, Keiji Aso's case has nothing to do with me!"

Ken Nishimoto, who had always been frightened, finally burst out all his long-suppressed resistance emotions.

Just like Lin Xinyi was worried: because he heard that his two companions had betrayed him and he had already ranked last in the "competition", he broke the can instead, and he was so emotional that he refused to let go.

"Miss Maori..."

Lin Xinyi dragged Mao Lilan aside, and said softly with some helplessness:

"You're making it up too inappropriate."

But Mao Lilan replied innocently:

"But what I just said is true."

"With the confessions of Kuroiwa and Kawashima, it is useless for Nishimoto not to admit guilt."

"Huh?" Lin Xinyi was a little surprised: "Did the two of them really confess their sins first?" ”

"yes..."

Mao Lilan said with some emotion:

"They are fighting too much, and they even confess their guilt for fear of being preempted by the other party."

"When I went to see it, they had already signed the confession and were taken out of the interrogation room, and they were cursing in the hallway..."

"Who's going to surrender faster?"