In the restaurant of Zhuang Tang's house, when the uncle brought Nan and the two of them over, Zhuang Tang Hu Tao was bent over and talking to Conan, looking very close.

"Is that so? It was so surprising that it was as if Holmes had turned into a little child......"

"This stinky boy," the uncle's forehead jumped, and his stomach was angry, "he confessed by himself." ”

Although it was the idea provided by Gao Cheng, it was also his commission, and he finally solved the puzzle without sleeping, and thought that he could enjoy the scenery in front of the big beauty.

"Then uncle," Conan said as he turned to his cranky uncle, "and Uncle will start reasoning." ”

"Huh? Me? The uncle still couldn't react, glanced at Conan suspiciously, and found that Conan looked obedient, so he coughed lightly, sorted out his tie and said, "That's the case, you can know who was the ......teenager back then after eating sushi supper."

"That's the way it is."

Outside Zhuang Tang's house, Gao Cheng did not interfere in his uncle's case, and faced Matsumoto Management Officer and Twilight helplessly.

"Nothing too useful, but in my opinion, the serial murderer shouldn't be here......"

"yes, I see."

Matsumoto still had a frightened face, his expression was calm and he couldn't see any fluctuations, and he didn't seem to listen to Gao Cheng's words at all.

"It should be that person......

"That person?"

Gao Cheng looked confused, but Matsumoto didn't have any intention of explaining, just stared at the Zhuang family villa tightly, and the aura on his body was quite depressed.

"There must have been something wrong with the police at that time," Twilight explained in a whisper, "Just when you sent the email, the police thought of the location of the prisoner's wounds, and found the prisoner's abandoned car, which had no fingerprints or bloodstains on it, only the seat cover on the driver's seat had been removed......"

"Got blood on the seat cover?" Gao Cheng raised his eyelids slightly, and he hadn't explained these details to him before.

If only the seat cover is stained with blood and is taken away, it means that the prisoner's wound should be on the back.

Ordinary people will reflexively press the wound with their hands when they are injured, so there should be a blood reaction on the car driven by the prisoner when he fled in a hurry, especially on the steering wheel, since there is none, that is to say, the wound is on the back, and the hand cannot reach it, so it will only get on the seat cover.

"That's right," Twilight said cautiously, "and he thought that the guy named Kusumoto was probably the original prisoner. ”

"That's right," Gao Cheng smiled bitterly, "but serial murderers really aren't here......"

Twilight looked at Gao Cheng unexpectedly, and although she believed in Gao Cheng very much, she still shook her head and said, "It's impossible to give up on the police, even if it's just possible." ”

Gao Cheng looked at the Matsumoto police and didn't say anything more.

He vaguely felt the pain in Matsumoto's eyes, even after experiencing so many cases and seeing all kinds of pain, he was still moved in his heart.

After all, some pain is hard for him to understand.

However, in addition to the wound on his face, it is estimated that there is also the reason why the police officer who died in the line of duty that year can be kept in the eyes of Matsumoto for fifteen or twenty years.

……

"Morimura Police?"

Chenghu Detective Agency, when Gao Cheng went home, Xiao Ai had already further sorted out the information.

"Yes, the Morimura police station who died in that incident was friends with Matsumoto police at the same time, and after the death, he was promoted two levels in a row, and was posthumously awarded the police ...... from the police department."

"It turned out that the police officer who died in the line of duty was a friend of Matsumoto Police."

Gao Cheng looked at the police information handed over by Xiao Ai, and sat down at the desk with his fingers crossed.

The Zhuang family did not gain anything, and it was not surprising, seeing that the prosecution period was approaching, there was no reason for such a cautious murderer to be fished out so easily.

But for him, that doesn't mean there's no way.

The killer did not leave no loopholes.

Gao Cheng looked at the case information again.

It is worth exploring the case 15 years ago, after committing several murders, why did the murderer commit it again 5 years later...... Herein lies the big problem.

Why is it 5 years later......

"Matsumoto Administrator? Matsumoto Management Officer?! ”

At the Metropolitan Police Department, Twilight screamed several times when he was reporting to work, waking up Matsumoto, who was sweating profusely from his sleep in the office.

"Are you alright? You seem to have a nightmare......"

"I'm sorry," Matsumoto came back to his senses, rubbing his eyebrows, "and suddenly fell asleep." ”

"How about you go home once in a while and get some rest? You've been living here lately and haven't slept much, have you? ”

"Even though you say so...... That serial murder streak is less than three days away from being established, and time is ticking while I'm resting like this......"

Matsumoto took a few sips of coffee with a calm face, sorted out his mood and asked, "By the way, what about the guy named Kusumoto who is suspected of fraud?" Did you spit out any clues? ”

"Yes," Twilight said, flipping through the records, "his name is Takahi Kusumoto, 42 years old...... At the time of that incident 15 years ago, he was living overseas, and he should have been able to rule out the suspects, and the reason why he had a wound on his back was because he saw that the scar on a man's back was cool, so he imitated it......

"He and the man with the wound on his back were met when he went to the sauna before going abroad, and the man had a towel on his head, so he didn't see his face, and the other party smiled and said, 'The wound on the back is a medal of courage left to me by the police five years ago, do you want to try it too?' , that's the way it is, I've already asked Sato and Takagi to investigate that sauna place......"

"Really?" Matsumoto nodded, "Tell them not to let their guard down." ”

"Yes, after all, it is a heinous murderer who killed 2 people 20 years ago and 1 person 15 years ago......"

"And one more, have you forgotten?"

"Of course I haven't forgotten," Twilight paused slightly, and his fat face was full of seriousness, "Morimura police who died in that incident was the one who took me to the line of duty and taught me how to be a police officer......"

"It's been 20 years." Matsumoto fell into memories, for so many years, he stayed up to the police, but he still couldn't find the murderer.

"Police," Twilight asked, turning back as she left the office, "I sent a copy of the details of the case, and I'm going to investigate it too, so if it's a shot, there will be no problem." ”

"Hmm." Matsumoto still frowned.

After so many years of unsolved cases, it is so easy to solve, and although he is a detective, he is just a child in the end, and he is not yet 20 years old.

There were only three days left, and it seemed that Twilight was a little anxious, and he could understand......

When Twilight closed the door and left, Matsumoto's expression sank even more, and his mind kept thinking back to the scene of the year, especially when he finally fought with the prisoner, and wanted to find some clues.

According to Morimura's deathbed account, there seems to be some special meaning to the tune that the prisoner has been hanging on his lips......