"Yes, my brother often doesn't go home on Saturday nights and will not come back until the next morning."

Hearing Chen Xing's question, Mai Tian Xiubang nodded and said, "I remember my sister-in-law who passed away the previous year said this. She thought my brother had an affair and kept calling him on Saturday night. As a result, my brother called home angrily."

"Do you know the content of the phone?" Chen Xing asked.

"My brother said he was seeing a doctor, so don't get in the way." Mai Tian Xiubang said.

Takagi Shiro's eyes lit up, "Doctor? Could it be the first Doctor Kokawa to be killed, right?"

"The policeman said the same thing twenty years ago, and it seems that he had even investigated it." Maitian Xiubang said: "But it was said that it was found that the doctor's patient list was not my brother."

After saying goodbye, Chen Xing returned to the car and looked at Ai Haibara, who understood and said, "I don't think it looks like that person."

"What?" Takagi Shiro hadn't reacted yet.

"Chen Xing was asking Haibara whether this person looked like the murderer just now." Conan said.

"But he obviously didn't speak." Takagi muttered.

Azumi said: "That aunt just now doesn't look like she is not."

Haibara Ai said: "However, if you pretend to be long hair and beard like when you passed by, your impression would change."

"That's right." Takagi nodded.

Next, the group went to Guojing Nagai's home, which was the son of Guojing Jin, who was killed five years after the two consecutive murders twenty years ago.

"At the time of the incident, Mr. Nagai Guoi was only 10 years old. He woke up when he heard his father's voice in his room. From the time the murderer left, until his mother who was out shopping came back, he was very scared and did not dare to leave his room."

Takagi Suk said: "His mother was greatly stimulated after seeing her husband's body. She has since become ill and is still lying in the hospital, so Mr. Yonggui lives alone in that home."

After arriving at the destination, the investigation did not go smoothly.

"Are you police officers still finished? I have said enough about that case, right?" Guojing Yonggui said angrily: "I am harassed by many reporters every day because I am about to pass the prosecution period. I am so annoyed that I am so simple! As for whom the murderer who killed my father has killed now, what does this have to do with me?"

Takagi carefully took out the photo of Hirado Doji and discussed: "Just say whether your father knows this Mr. Hirado."

As soon as he finished speaking, the photo in his hand was slapped by Guojing Yonggui, "Who knows!"

After saying that, the person went straight into the room and slammed the door.

On the way back, Takagi Sho was still feeling a little depressed, "I remember he was not such a person before."

"Is that true?" Conan said curiously.

Takagi nodded, "I heard Officer Meguchi say that as long as he remembers about what happened before and after the incident, or remembers something strange that his father had said, he will tell the police immediately as long as he remembers something."

"What's strange?" Conan asked.

"On Sunday, his father would sleep until noon, and he would whisper in his mouth when he got up." Takagi recalled: "What do you say, 'My parents were knocked away last night', 'It's so scary'."

Mitsuhiko guessed: "Is someone's parents hit by a car?"

"By the way, because that person is a lawyer, could he receive the commission from the perpetrator or the victim?" Aomi said.

Haibara Ai asked, "Why is this strange?"

"The murdered lawyer Guojing specializes in handling legal affairs of the company and has not been responsible for traffic accident cases." Takagi said.

"So why..."

"It is because Mr. Yonggui can't figure it out that he will tell the police if he finds it strange."

"Can it be that the crying man wants to see a doctor, so his parents were knocked away?" Yuan Tai made a guess weakly.

"..." Others.

While the few people in the car were confused, Conan did not participate in this discussion, but lowered his head and thought quietly.

The car was not driving fast, and the street lights cast lights and shadows in the car. At one moment, he held down his glasses and a confident smile appeared on his face.

"So that's it. I finally understand the relationship between these four victims!"

"Ah? You understand again!" Arimi bulged her mouth and clenched her small fists.

...

"Mahjong? You mean the common point of the four victims killed by serial murderers is mahjong?"

Next to the vending machine on the roadside, several children sat comfortably on the bench drinking drinks. The tool man Takagi Suk stood beside him, still caring about the case.

"Didn't Mr. Pingdong also say on the TV interview program, 'It's close to the end of the game, I want to get through this game', and all these are mahjong terms." Conan said: "He should be a man who loves to play mahjong."

"That's right, what about the other three?" Takagi Shiro said curiously.

"Mr. Kokawa refers to the person who often cries in mahjong." Conan explained: "In order to draw early when playing mahjong, he uses the cards played by others and the cards in his hand to form a combination of three to four cards, which is called a jing card, and jing and cry are homophones."

"What about the sentence 'It's so scary that my parents were knocked away'?" Takagi Suggi immediately said.

"It should be 'being knocked away by his parents, it's really terrible'. It may be because Mr. Yonggui was a little young and wrong." Conan said while opening the pull ring of the can: "'Parents' refers to the mahjong dealer who can get extra points after Hu card. The so-called 'being knocked away' means that the number of times jumped after being Hu card is large. So I think this sentence means that the dealer is cheating a lot and he loses a lot."

"What does Mr. Maitaki mean when he said 'I am seeing a doctor now'?" Haibara Ai also knew nothing about mahjong.

Conan said lightly: "That should be "I've heard it now." It's the lady who heard it wrong."

"Really, it sounds really similar." Mitsuhiko and the others exclaimed.

After hesitating for a moment, Chen Xing asked, "What did you just say 'listen'?"

"It means that you can prepare a Hu card as long as you add another card." Conan chuckled, "So, when you can get Hu card soon, you will be angry if you keep disturbing by paging."

Chen Xing nodded, it seemed that it was necessary to tutor this kind of knowledge after going back.

And Ai Haibara obviously saw his plan, "There is no need to understand this kind of thing."

"Oh." Chen Xing responded.

Conan spread his hands, "These statements are all mahjong terms, so it is normal for people who have never played mahjong to mislead."

Takagi took out the record book and flipped it out, thinking: "The people who heard these words were Mr. Okawa and Mr. Maitada's two wives, and Mr. Nagaki, who was a child at the time. So, the last few words he heard the murderer say were also related to mahjong."

Conan's move to drink a drink, "The last few words?"

"Well, before the murderer was leaving, he said a few words, and was heard by Mr. Nagai who was staying in the room." Takagi Suk said: "'Please don't blame me, you have to be responsible, it's all because you said that I heard the death card, and the police left such a big scar on my body'."
Chapter completed!