My neighbor's name is Conan

Maruta Ayumi continued to report, "He said that he and the man with the scar on his back met by chance in a 'SPA Natural Hot Spring' before going to stay abroad, and because his head was covered with a towel, his face was not visible.

The man said, 'The scar on my back was a medal of courage carved by the police five years ago. Do you want to try cutting one too?' He said this with a smile.

In other words, the other party is consciously guiding some people to get the same scars as him in order to confuse people.

However, the other party, knowing that he had such obvious scars on his body, still dared to go to the public bathhouse to take a bath. This courage is worthy of a criminal who dares to kill people serially. He is really big and does not seem to be afraid of being discovered by others at all.

"Where is that 'SPA natural hot spring'?" Superintendent Matsumoto asked immediately after hearing this.

"Sato and Takagi have gone there to investigate now." Inspector Megure replied.

Upon hearing this, Superintendent Matsumoto immediately said, "Remind them both not to be careless."

"Yes!" Inspector Megure responded quickly, "He was a vicious murderer who killed two people 20 years ago and another person 15 years ago. He killed three people in total."

Superintendent Matsumoto denied what Inspector Megure said, "No, there is another person, have you forgotten?"

Inspector Megure said with a painful look on his face: "I will never forget Chief Inspector Morimura who died in that incident! It was he who led me into the police world and taught me many things!"

As Inspector Megure stood up and walked towards the door of the conference room. It seemed that he was going to inform Sato Miwako and Takagi Wataru, or to calm himself down.

Police officers are also human beings. When faced with certain things, they will still experience huge emotional fluctuations, so they need to see a psychologist from time to time.

After Inspector Megure left, Superintendent Matsumoto also whispered to himself: "Superintendent Morimura!"

He was also the senior who led him in handling cases back then.

[Now my title has finally reached the same level as yours, who was promoted two levels after his death. However, I still don’t understand what you meant by that sentence? What is the hidden meaning behind it?]

what……

Chief Inspector Morimura!

After hearing what Superintendent Matsumoto and Inspector Megure said, Aoki Matsu recalled some things.

"Matsumoto, there must be some meaning to that guy's whistle! There must be something hidden!"

Aoki Matsu remembered that this was what Inspector Morimura said to Inspector Matsumoto before he died.

In fact, it does have a deep meaning. Aoki Matsu can't remember the specific name of the song, but he remembers that the murderer killed people because in order to prove the feasibility of a perfect crime, he took the police's pistol without the police noticing. As a result, his partners accused him of wanting to break up. He was afraid that the matter would be exposed and ruin his future, so the murderer killed the other three.

So the song that the killer whistles seems to be about how the group will never break up.

As for the song and the murderer's name, Aoki Matsu really couldn't remember it.

The only thing he could be sure of was that the three people killed by the murderer were his partners at the time.

The murderer was eventually discovered by the son of his murdered friend, who killed him in revenge for his father.

The murderer did it to prove the possibility of his perfect crime, so he provoked the police and attacked the police's pistol. And he was not discovered or checked out afterwards.

Because the other party is——a criminal psychologist!!!

What a departure!

This is because criminal psychologists are all insiders of the education and judicial system, and they are the ones who helped the other party commit the crime and successfully get away with it.

It would be strange if it could be found!

In almost 99% of cases, people will not suspect their own people unless there is irrefutable evidence.

Thinking of this, Qing Musong scratched his head. How should he uncover this case?

In this kind of case, Conan, an outsider, naturally cannot be allowed to shine, otherwise his character will collapse.

But, this is an old case.

The mechanism triggered in the world of science is either that the other party commits a crime again, or that Conan is just lucky enough to meet him.

After rational analysis, Aoki Matsu felt that the current case was probably the latter.

Therefore, there are only two options before Aoki Matsu - either wait for Conan, or find a way to expose it in advance.

As for how to get it out.

Aoki Matsu actually has two commonly used methods - writing a letter to Inspector Megure and calling Inspector Megure using an anonymous phone card.

Hehe, every time it’s Inspector Megure who is the “trouble”.

In addition to this, there is another method that is not often used but can be used - creating an informant out of thin air.

As long as the murderer can be caught, some unreasonable circumstances surrounding the informant will be ignored.

But the most important thing now is to determine which criminal psychologist is the murderer!

Aoki Matsu really forgot the other party's name. If it weren't for the other party's special occupation and special reasons for committing the crime, Aoki Matsu would probably not have remembered the case.

This matter is difficult for others to investigate, but it is easy for Qing Musong, because every criminal psychologist, oh no, it should be said that everyone who has received relevant knowledge in a regular school will be recorded. Because these people have a wrong idea, and when they commit a crime, it is more terrible than ordinary people.

First of all, the age. According to Superintendent Matsumoto, the murderer should be between 40 and 50 years old, because he felt that the other party was a young man in his 20s 20 years ago.

A 30-centimeter-long wound, ignoring extreme cases, can only be sustained on the body of a person who is over 18 years old. Otherwise, the body would not be that wide and it would be impossible for such a long wound to be sustained.

To be on the safe side, Aoki Matsu screened out criminal psychologists aged 38 to 60.

Lots of people.

But there are still screening conditions for Qingmu Song.

Since this case is very likely due to the help of science and Conan "accidentally" encountered the murderer, the murderer's residential address is very likely to be very close to where Conan and the Junior Detective League play and live.

At the same time, the address is also very close to the SPA natural hot springs.

And the criminal psychologists who will be in this range these days, rather than traveling out of town.

To Qing Musong's surprise and delight, there was only one person who met all four screening conditions - Ping Dong Tangci!

It's not that there are no other people who meet these four conditions, but the others are all on business trips out of town, and only Ping Dongtangci is alone in Tokyo now.

And Pingdong Tangci's residential address is actually - downstairs from Ayumi's house!

Aoki Matsu immediately took out his cell phone and sent a greeting message to Sayuri.

After a few minutes, Sayuri replied - they were going to go to Ayumi's house after school this afternoon.

There is no doubt about it, Ping Dongtangci must be the murderer!

Now all we need is one more piece of evidence, that is, Ping Dongtangci is related to the three people who were murdered 20 years ago and 15 years ago, and Aoki Song can make a complete decision.

The first case occurred 20 years ago. The victim was a 50-year-old doctor named Tsujiji Boukawa. The murder weapon was a samurai sword that belonged to Mr. Boukawa himself.

An "E"-shaped pattern was scratched on the back of the body.

Before his death, he often drank with others on Saturday nights and was called a crybaby.

The second case occurred two days after the first case. The victim was 42-year-old Atsunori Mujita, an assistant professor in the Department of Science and Engineering at Touto University. The murder weapon was the same samurai sword.

An "S"-shaped pattern was scratched on the back of the corpse.

Before his death, he often went out on Saturday night and did not return home until the next day, claiming that he was seeing a doctor.

When Chief Inspector Morimura, who was in charge of the investigation at the time, saw a suspicious person suddenly appear and went forward to inquire, he was hit by a fleeing vehicle that suddenly started moving, and was seriously injured and died on the job.

Inspector Matsumoto, who chased the car and forced it into a dead end, was also attacked by the suspect. With his left eye injured, he snatched the samurai sword and slashed the murderer with his backhand, leaving a straight knife wound on his back.

The third case occurred 15 years ago. 34-year-old lawyer Jin Guojing was murdered with a kitchen knife from his home. The method of committing the crime was to first use an electric baton to make the victim unconscious, and then use sharp objects such as samurai swords to cut the body. It was extremely cruel.

A "W"-shaped pattern was scratched on the back of the corpse.

When he was alive, he would mutter to himself on Sunday mornings, "My father was hit and thrown away last night."

However, there were no signs that the door locks had been pried open in these three murders, so the search was focused on whether the crime was committed by an acquaintance. However, the three victims had nothing in common, so the investigation came to a standstill.

But Qing Musong knew through the plug-in that these three people were accomplices of Ping Dongtangci's "crime"!

But this is a little bit strange.

What's strange?

age!

Ping Dongtangci is only 41 years old this year.

The four people's ages were converted to 20 years ago:

Boukawa Tsuguharu was 50 years old, Mujida Atsunori was 42 years old, Nabei Susumu was 29 years old, and Taira Tōdōji was 21 years old.

There was a good saying on the Internet in my previous life: There is a generation gap every three years.

The generation gap between these four people is too big. They are not relatives, and there was no such thing as Internet dating at that time. How did these four people get together?

Aoki Matsu carefully checked the information of the four people. Because there was a criminal who died in the line of duty that year, although there was no correct direction for the investigation, the basic information was done very carefully.

The four of them graduated from different schools, majored in different subjects, and had different hobbies...

Qing Musong compared them one by one, and suddenly found that the four of them had the same hobby, that is - playing mahjong!!!

Oh, by the way, mahjong friends.

Aoki Matsu suddenly understood a lot of things.

Why were the three unwilling to follow Ping Dongtangci to do illegal things? Because the older ones had already achieved success and there was no need to take such risks.

If you play mahjong all night, you will really become confused and agree to things faster than your brain.

The things that the three people often did before they were killed have another interpretation using mahjong terms:

The "crybaby" that Fangchuan Jizhi mentioned means "a person who loves to play mahjong" among mahjong lovers. Crying and playing mahjong have similar pronunciations. So when he was alive, he didn't often drink with others on Saturday nights, but played mahjong with others.

What Mai Tian said about "seeing a doctor" actually meant "always listening", that is, he was just one card away from listening. At the same time, he often went out on Saturday night and did not return home until the next day.

Susumu Nabei said to himself at the Sunday morning meeting, "My parents were knocked away last night (pro がはねられて)", which actually meant "the banker made a lot of jumps (pro にはめられて)".

Moreover, the three people had the letters "E", "S" and "W" scratched on their backs. Aren't they the directions of east, south, west and north?

Having reasoned this far, Aoki Matsu immediately stood up and walked towards the office of Superintendent Matsumoto with the file.

"Inspector, I checked the information of the three victims and found that they actually have one thing in common." Aoki Matsu said directly.

Superintendent Matsumoto and Inspector Megure, who was sitting inside discussing the case with him, immediately looked over when they heard this.

"What do they have in common?" Inspector Matsumoto asked with his eyes wide open.

"I go out to play mahjong on Saturdays." Qing Musong gave the answer directly without beating around the bush.

Superintendent Matsumoto and Inspector Megure looked at each other in surprise when they heard this.

Superintendent Matsumoto and Inspector Megure had read through the basic information of the three victims and naturally knew that the three had a hobby of playing mahjong, but they did not specify which day it was on Saturday. The hobby of playing mahjong was too common, so they did not consider it as a common point at the time.

Superintendent Matsumoto immediately asked Aoki Matsu to give an explanation.

Qing Musong told the two what he had reasoned just now, "If they just played mahjong, it doesn't mean that the three of them knew each other, but if it was fixed on Saturdays, then it would be different."

Most companies have Saturdays off, and many people stay at home, or spend time with their parents, spouses, and children. Some also take the opportunity to go out and play.

Even though it’s a holiday, it’s actually hard to invite people to play mahjong on holidays.

"In fact, I have always been thinking that the three victims had a certain age difference. Who could be an acquaintance of three people of different ages? If they were playing mahjong, then it would make sense." Qing Musong looked at the two and said, "I suggest taking the photos of the three people and asking about the mahjong parlors near the three victims' residences and companies at the time to see if anyone remembers whether the three of them were playing mahjong with others."

Although what happened 20 years ago is really too far away, in the current situation where there is nothing we can do, we can only try our best.

After hearing this, Superintendent Matsumoto and Inspector Megure thought about it and decided to agree with Aoki Matsu's idea.

There is really no other evidence. I can only try this clue which seems to be useless. Just in case, just in case!

I didn't expect that this time, it might really appear.

The lucky man of the Metropolitan Police Department, Takagi Wataru, has made a great contribution again!

When he and Sato Miwako received the news, they were at the SPA natural hot spring. It happened that Takagi Shigeru knew that there was a mahjong parlor nearby, so the two of them went to the mahjong parlor first in order not to miss any.

Unexpectedly, I gained a lot.

The waiter, whose temples looked gray and whose hairline had moved back a lot, immediately recognized the three photos when Takagi Shigeru took out the photos and showed them to him.