Especially when I saw that the owner of the mahjong parlor also confirmed that the person Gao Yuan found was really the student who played mahjong with the three deceased twenty years ago, which has proved that Gao Yuan did not find the wrong person.

Therefore, this situation is even more puzzling to the police officers present.

Among them, Officer Twilight and several other police officers who have had a lot of contact with Takato can still accept Takato's speed of giving conclusions so quickly, Matsumoto Kiyocho is the first time today that he has formal direct contact with Takato in the investigation of the incident, so this shock is not very accustomed to him.

So, in the face of the fact that Gao Yuan has found the identity of the suspect, Matsumoto Kiyocho still can't help but ask Gao Yuan, intending to understand why Gao Yuan can lock on to this target person so quickly-

"Mr. Wise, how did you identify this man?"

Matsumoto Kiyocho asked directly and curiously, wanting to know why Gao Yuan was able to lock in the candidate so quickly.

In this regard, Gao Yuan also immediately gave an explanation:

"Twenty years ago, students were able to talk to doctors, associate professors, and lawyers about the case, and eventually analyze the facts of the case. Don't you think, such a combination is interesting? Doctors can be responsible for forensic related specialties, associate professors can demonstrate theoretical techniques, and lawyers are in charge of law...... So the student who can join this group and chat together is not easy to think about, it is possible that his major is also conducive to solving cases, and it is different from the other three.

"Secondly, this mahjong parlor is located near the homes of the three deceased, so it is obvious that the student will also come here for a similar reason. The 20-year-old student could come every Saturday, probably not because of the proximity of his residence, but because of the proximity of the school he attended at the time. Therefore, with this mahjong parlor as the center, and the farthest distance from the homes of the three deceased at present, there is exactly one university in the range, and it happens that the university is very well-known in criminal psychology, so I guess it is possible that the student's major is this.

"Eventually, students in their early twenties are now in their early forties. At this age, plus he was able to talk to the three deceased people with such a big age gap back then, presumably his professional knowledge is also very good, so there is a high probability that if this student is engaged in the industry now, he should be well-known.

"So, to sum up, what we are looking for is most likely to be someone in his early forties, who graduated from that university, who majored in criminal psychology, and who is now a little well-known in the major. With such a scope, it is not difficult to lock down a suspected candidate. ”

In this way, Gao Yuan roughly described the method of locking to Pingdong Hall.

In this regard, everyone present was shocked, and felt that what Gao Yuan said was indeed reasonable, but they didn't expect it to be so narrow.

Hearing this, the owner of the mahjong parlor couldn't help nodding, exclaimed, seemed to remember something, and then said:

"Oh...... I remembered that the student was indeed studying criminal psychology, and every time they talked about the case, he could always confirm who the murderer was from the psychological perspective of the criminal...... Something like "the prisoner is a husband who was specifically interviewed" or something......

In this regard, Gao Yuan couldn't help but glance at this boss helplessly-

You should have thought about it earlier, and you would have had to find another reason to explain it......

- That's right, Gao Yuan's so-called analysis process is actually made up casually, but the actual situation is that because he knows the plot of the original work, he probably remembers the current appearance and occupation of the key student, and then finds the person who looks the same as the person in his impression and the original work from the criminal psychology experts who match his age.

In this way, because the answer is directly known, after having the answer, Gao Yuan will reverse the process of making up the answer through it, so it is naturally very simple.

In this way, if the boss remembered that the student was studying criminal psychology earlier, then the process of making it up by himself could be much easier.

However, it's not bad now-

"Anyway, find this person now, let the child of the third deceased come over and confirm the voice, and everything will be revealed. After all, that kid had heard the prisoner's voice back then. ”

Gao Yuan said.

"Well, Twilight......"

In this regard, listening to Takato's words, since there was already a clear goal now, Matsumoto Kiyocho also gave the order directly.

Hearing this, Officer Twilight on the side immediately replied, and then left the mahjong parlor with Officer Shiratori.

For the rest, Miwako Sato and Wataru Takagi were left here, ready to do some forensic work about this mahjong parlor.

In this way, at the moment, regarding the current progress of events, as well as Takato's rhetoric, Miwako Sato asked curiously:

"But...... Since that person had such a good relationship with the three of them back then, why do you think Mr. Wise is the murderer? It's entirely possible that it was the one who had a conflict with the four of them back then, right? ”

In response, Wataru Takagi nodded in agreement.

And in the face of such an inquiry, Gao Yuan also gave an explanation:

"Remember when the boss said they talked about 'total crime' before they broke up? I think the crux of the matter should be related to this. ”

Saying this, with a calm face, Gao Yuan looked at the owner of the mahjong parlor with some confidence and asked:

"Boss, after they talked about the 'total crime', did any strange incidents happen around here?"

"Huh?"

Being asked like this, the owner of the mahjong parlor couldn't help but look up and think about it, and then said in surprise:

"Ahh I remember that a long time ago, at about the same time as you were talking about, there was a gun loss in our neighborhood. It was while the patrol officer was asleep that he took the gun, which caused a lot of commotion, and two days later, the gun was returned again, and the result was gone......

"However, at that time, everyone was speculating that the person who did this should be the man who had a conflict with the four guests, because it is said that he did a lot of bad things, so everyone thinks that he did this too."

"yes, I see."

After listening to the boss give the answer he wanted, Gao Yuan nodded with a slight smile and affirmed:

"In this way, I think I can probably understand the reason for the prisoner......"

"What?"

I was confused again, and I couldn't understand how Gao Yuan deduced the reason for the murder through the boss's words just now, Matsumoto Kiyocho and Miwako Sato were all confused.

And Gao Yuan immediately explained:

"Because 'total sin'! The patrolman lost the gun, and although it was finally returned, he never found out who did it, isn't this a 'complete crime'? (End of chapter)