"The essence of scars is divided into pigmentation and granulation tissue. If it is a living human body, the cut scars will be quickly affected by new scars due to the metabolism effect, and the two compositions mentioned above will be difficult to identify even if the new wound has not yet scabbed."

"But if it is on the corpse, especially after the heart has stopped beating, the scar is cut open. Because the blood no longer flows, pigments are rarely metabolized and the new wound does not scab, it cannot be covered. Unless the scar is directly blurred, some traces will be left behind many times. After all, the bigger the wound, the harder it is to cover it." Xiao Ye Yiyu explained in detail in the face of Mizumatsu's inquiry.

"So that's it, thank you, thank you." Mizumatsu hung up the phone happily and stood up to check Hirado Doji's back to verify it, the management officer Matsumoto walked in, and the Meguro Police Department was with him.

"Miya, what is the case like?" As soon as Meguro police department came in, he asked uncontrollably.

"It's not the murderer twenty years ago, it's just an imitator." Mizumaki told the truth.

"Is it just an imitator?" The management officer of Matsumoto lowered his head in disappointment, shook his head and sighed.

"What's wrong?" Mizumatsu felt that the management officer Matsumoto didn't look like he was simply disappointed, and he seemed to be sad because he was dissatisfied with himself.

Could it be that the management officer of Matsumoto was really disappointed to know that he was exposed and could not blame the murderer twenty years ago? Mizumatsu couldn't help but think maliciously in his heart.

Of course, it was impossible for the management officer Matsumoto to do it. If it were the management officer Matsumoto, you should know the identity of Hirodo Doji the moment you see Hirodo Doji's back.

After sighing again, the management officer of Matsumoto said, "My eyes are really old. When I walked into this house, my scars were painful severely, but I didn't expect that I was just reacting to imitation."

Mizumatsu and Megumi Police Department both expressed a black line to Matsumoto's management officer's intuition that was similar to that of the middle school, but Mizumatsu said, "I think there is nothing wrong with the scars of the management officer?"

"Oh? Is there any clues to the murderer on the imitation criminal?" The Matsumoto management officer who was still feeling old just now became energetic again.

"No..." Mizumatsu shrugged: "Why do everyone look at the living?"

"Is that so!" Matsumoto's management officer and Meguro police officer looked at Hirado Doji's body with his back facing everyone, and the dark red Z-shaped characters on his back attracted everyone's attention.

Mizumatsu found a wet towel and cleaned the top horizontal line of the scabbed Z.

Sure enough, on both sides of the knife wound, you can see some special skin that is slightly dimmer than the surrounding skin: "Please identify it yourself. Is this scar still familiar?" Mizumatsu turned around and made a gentlemanly "please" gesture to the two of them.

"This...this..." Matsumoto's management officer's hands were trembling, his eyes widened, his face flushed, and even the scar that was still on the alarm just now seemed to be red. Seeing Mizumatsu was afraid that the management officer would faint after a heart attack and cerebral hemorrhage.

"So this person is the murderer of five cases twenty years ago and fifteen years ago?" asked Meguro's police department with a trembling trembling.

"That's right, even before this case, I had found some connections between the victims, and Hiraki Doji happened to meet the situation. If it weren't for the case, I would have to verify it immediately." Mizumatsu explained.

"What is it!" Matsumoto's management officer suddenly rushed up and grabbed Mizumaki's shoulder and asked.

"Cold... Calm down, it's mahjong." After a difficult psychological struggle, Mizumatsu chose to wipe off the saliva from his face in front of the management officer, and then said.

"Mahjong?" Everyone around was stunned.

"Yes, I spent some time investigating some folk mahjong rules in the morning." Mizumatsu said shamelessly: "According to the memories of the deceased's family, all the deceased went out on Saturday night, and the words related to that are actually related to the mahjong language."

"In other words, all the dead are mistresses?" The little eyes of Meguru police officer were wide open, unable to believe this magical inference.

"Although it's hard to imagine, this result is not unreasonable. It would be better to say that there is no more reasonable reason for three or four people with different identities and statuses to sit together and get involved." Mizumatsu spread his hands.

"Can you find these evidences in... this person?" asked the management officer of Matsumoto.

Regarding Hirado Doji, the administrator was hesitant whether to call him the deceased or the murderer.

"Yes." Mizumatsu nodded: "The show that this person recorded before was broadcast this morning, and most of the lines he used were related to mahjong terms. So there is no doubt that he is N on the mahjong table."

"Then now we need to check whether anyone knows that these four people have played mahjong together." The management officer of Matsumoto adjusted his state, and the great leader's aura was back, and he was preparing to arrange people to visit the mahjong halls across the city.

"I did the order, Mizuma. I thought you went out to search for clues early in the morning to be lazy!" The police department of Memu happily patted Mizumatsu on the shoulder.

The moon is sweating in the water that has a ghost in my heart.

"Don't be angry. In the morning, you stared at me with dark circles and told me that you were going out for a visit. No matter how you look, you just want to find a place to sleep." The police department of Megu explained awkwardly, and it was still the same as the old man.

"Don't worry! Don't forget that we have a case in front of us waiting to be solved!" Mizumatsu said with laughter and crying. These two bigwigs just missed the old things twenty years ago, and seemed to have forgotten that they had not found the murderer who killed Hirado Doji.

"Yes, who killed him?" The police department of Meguru finally reacted.

"According to my analysis, there are two possibilities for the identity of the murderer, but they are all pointing to the same group of people." Mizumatsu raised two fingers: "First, the murderer did not want the prosecution period of the case twenty years ago to exceed the time limit, so imitating the murderer to commit crimes, so the prosecution period was extended. Experts who made a fuss about the murderer on TV naturally became the best target. In addition to the management officer, those who have such a request only have the family members of the victim; the other possibility is that in the TV program this morning, the murderer discovered that Doji Hiraki Hirado was the murderer, and then came to take revenge. Those who had resentment towards the murderer twenty years ago should still only have the family members of the victim." Mizumatsu stated.

"It should not be limited to the victim's family, right?" Meguro's police department felt that Mizumaki's analysis was not correct enough.

"Because of confidential information," said the management officer of Matsumoto: "The murderer whistled twenty years ago and the murder method were all in the contents of confidential information. If the imitator could imitate all of these, it means that they are people who know the confidential information. Apart from the police's information leak, only the victim's family is left."

"That's right, so I suggest that the troops are divided into four groups and visit the mahjong hall separately, as well as the victim's relatives." Mizumatsu suggested, and then changed his words: "No, there should be several families who are informed. Now, less than an hour has passed since the murder case. The murderer should still be dealing with the traces. From the scene, the murderer will at least be stained with some splashed blood."

"Didn't you read the information about the victim's family carefully? It's enough to be divided into four groups now." Meguro police department rolled his eyes to Mizumatsu: "Kagatoshi Jiji has no descendants, his family has only his wife; Atsuno Maida's wife has passed away, and the only suspect who is familiar with the matter is his younger brother. Guoi Jin divorced his wife before he was killed, and only his only son knows the situation."

"I will take people to visit Guojing's son, Megu will take people to meet Atsuno Maida's younger brother, Mizuma will take people to find Kawakawa's wife, the rest will detain the people who are maintaining the scene, and the rest will go to investigate the mahjong hall." The management officer of Matsumoto started to arrange without saying a word.

In the blink of an eye, the management officer Matsumoto and the police officer Meguri ordered five or six people to follow him, leaving only Mizumatsuki.

"Public Opinion!" Shui Jianyue called out to Shan County Gongwang, and his department head: "You go and order a few people to go to Fangchuan's home, this is the address." Regardless of Shan County Gongwang's surprised eyes, Shui Jianyue took him the note with the address of Fangchuan's home.

Because Mizumaki guessed the little abacus of the Matsumoto management officer in one second, Kawakawa Shiji's wife was already sixty years old, and Atsuno Makita's younger brother was nearly sixty years old. Compared with them, the only son of Kuroi, who was only in his twenties, was eager to arrest the prisoner with his own hands, so he sent Mizumaki and Meguro police departments to the families of the other two victims.

"Okay, the forensic personnel and the forensic doctor don't have to act together. Leave you, you, you and you two guard and protect the scene, and the rest of the people will check the mahjong hall with me." Mizumatsu took out the map of the mahjong hall from his arms. He was about to mark the Mahjong Hall on it, but he remembered what if the Pingdong Doji had moved in the past twenty years, so he had to give up and marked the mahjong halls that were almost the same distance from the homes of the first three victims. Mizumatsu assigned the task of each group of one mahjong hall, which was just left alone. Mizumatsu sent him to check if Heidong Doji had moved and where his address was twenty years ago.

...

Mizumatsu walked into his first target mahjong hall.

"Hello, are you the only one?" An elderly waiter stood at the service desk in the mahjong hall. His hairstyle, which was precarious, was a little funny, and he greeted Mizumama enthusiastically.

"Hello, I'm not here to play mahjong." Mizumatsu smiled and walked over.

"I don't think you are, either. Few people come to play mahjong during the day." The waiter said with a smile: "So young man, what do you want?"

"I'm a policeman." Mizumatsu took out his police officer's certificate and handed it to the other party: "Don't worry, I'm just here to ask about some old past events."

"Old past?" The waiter didn't understand.

"First of all, the first question is, how much time have you worked here?"

"I think about it, it's about thirty years soon."

"So do you know these people?" Mizumatsu took out another photo of the four dead people from his arms: "I think they should come to play mahjong frequently for about twenty years, and the time should be..." The reason why I didn't say it clearly might be here or not is to add a faint psychological hint to the other party to make the other party work harder.

"It should be every Saturday night?" Unexpectedly, the waiter answered quickly.

"Do you recognize them?" Mizumatsu asked in surprise, but unexpectedly the first mahjong hall won the prize.

"I recognize these three people. As for whether this person is known, could it be that the police officer was afraid that I would lie and deliberately test me?" The waiter had a lot of imagination and said, pointing to the photo of Hirado Doji.

"Sorry, I have their old photos of the other three, and only this person is the current photo, so it is not the same as in the past twenty years." Mizumatsu explained.

"Ah, after all, the one who sat with them at that time was a college student who still studied psychology. Although he didn't have so many beards, his face really looked very similar." The waiter recalled.

As a result, Mizumatsu was confused: "Do you have a deep impression of them?" It is hard to imagine a mahjong house waiter who still remembers the guests from twenty years ago.

"Yes, that's a very powerful customer at the table!" The waiter showed a reminiscent look: "I'm so anxious that they come here every Saturday at 10 o'clock. Doctors, professors, lawyers and college students. Although the four of them have different ages and occupations, they are in a similar mood. They always play cards while reasoning about the actual cases..."

"Wait? You're going to reason." Mizumatsu's eyebrows frowned again.

"Yes, from medicine, physics, law, etc., everyone analyzes recent cases from their own expertise, and then summarizes them together. What surprised me was that in the end, the facts proved that their reasoning was 100% correct." said the waiter uncle.

"Life is so knowledgeable everywhere!" Mizumatsu exclaimed on the surface.

‘It’s another group of detectives who are idle and painful.’ Mizumatsu cursed in his heart.

"Yes, it's a pity that they didn't come again later." The waiter sighed.

"Is it because of some conflict between them?" Although I don't understand the murder case that has been hyped recently, this uncle didn't know about it, Mizumatsu also pretended not to know about the murder case and simply followed the question, but in fact he wanted to ask about the motive for the murder.

"It seems like this when you say this!" The waiter seemed to have just started to consider this issue: "I remember one day they had no cases to talk about, so they talked about what seemed to be a complete crime topic, and finally they debated."

"Is it a perfect crime?" Mizumatsu asked, as if those reasoning fans like to study this.

"Yes, yes! That's the word." said the waiter: "They parted in disagreement that day, but they still got together as usual on the second Saturday, but this time they started arguing before they started playing mahjong and finally left."

"In the third week, the college student was left alone, sitting alone on the mahjong table, fiddling with mahjong placards."

Mizumatsu estimated that it was probably because two of the four people had died at that time, and the other one, Guojing, guessed that it was Hiraki Doji who did the case, so he did not dare to show up.

"So that's the case. Thank you for your answer. In a few days, the police will invite you to take the transcript. Don't panic at that time. Just say these again." Mizumatsu said.

"Sorry, Mr. Police Officer, I don't know what happened to the four of them?" asked the waiter uncle.

"Ah, I'll be reported soon, so it's okay to tell you. All four of them have been killed now!" Mizumatsu spread his hands.

"I was killed!" The uncle was startled and asked quickly: "Is it that crazy?"

"What crazy man?" Mizumatsu, who was already planning to say goodbye, was interested again.

"I am an introverted guest. When the four people used to reason, he always ran over to find out their faults, but they were speechless and fled in panic." The waiter thought for a while and said seriously: "It was the day when the college student was alone. The person ran over to mock the weak college student. As a result, the two of them quarreled excitedly and threw mahjong cards at each other. Finally, the person roared angrily and said, 'I'm going to kill you all!' In this way, they never came here again." When he said this, the waiter's expression became sad.

When he woke up, the waiter smiled and said, "Police officer, don't laugh at me. I have never had any special experience in my life, so that table of magical guests is an unforgettable memory."

"By the way!" The uncle suddenly crawled under the service desk and carried a box full of dust.

"This is……?"

"Didn't you just say it? After the two of them were quarreling, they threw mahjong cards at each other. The people who were scratched by them could not be used by the guests anymore. I left this mahjong plaque to commemorate those people, but after a long time, I almost forgot it..." The waiter laughed.

"Huh? Have you rubbed this deck of cards?" Mizumatsu suddenly became excited.

"It shouldn't be there?" The uncle couldn't remember all the trivial matters twenty years ago.

"If I haven't brushed it, I might be able to check their fingerprints on it." Mizumatsu said excitedly.

"Yes, yes! I heard the doctor's fingerprints say, and the madman's fingerprints must be found on it." The waiter was even more excited, as if he had already avenged those people.

Mizumashi's phone rang.

"I'm Mizuma... Well, um, I caught it?... As expected, I'll go back immediately. I'll find it here at the mahjong hall. If I got the evidence, it's a human witness."
To be continued...