After Kidd the Monster Thief is blown away by a tornado, the scene is completely fried.

Metropolitan Police officers and Kidd's fans joined forces to launch a dragnet search near the clock tower – all fearing that Kidd, the monster thief, would be smashed into meat sauce like this.

Later, after some searching...

The good news is that Kidd's body was not found.

The bad news is that Kidd mostly managed to run.

But neither the police officers involved in the operation, nor the head of Odakiri, who boldly appointed Lin Shinichi as his commander, or even the higher-level Hakuba police chief, did not feel that this news was bad news.

Because although the thief Kidd was not caught, the Metropolitan Police Department won:

The Metropolitan Police Department's primary goal was not to capture Kidd, but to restore its own image in public.

And tonight this operation...

Kidd, the monster thief, was locked up in a big net under the live broadcast camera, and was forced to jump up and down and bark by a dog.

His image of invincibility has completely collapsed.

Everyone can see that if it weren't for that demonic wind, the monster thief Kidd would definitely be planted this time.

This is a "natural disaster" and an "accident" and does not have any impact on the image of the police.

Therefore, the Metropolitan Police Department has rarely become the dominant side this time and has made a beautiful comeback.

Although the main force involved in this operation is still the private masters...

But at least Lin Xinyi, the commander-in-chief of the operation, was specially hired by Minister Odakiri for half of his own people, and the police dog Caesar, who was in the limelight in front of the camera, was a regular employee of the Metropolitan Police Department.

At the press conference the next day, the Metropolitan Police Department's spokesman naturally deliberately downplayed the role of Shinto and Kyogoku Shin in the incident, emphasizing the resourcefulness of Hayashi Shinichi, the know-how of Oda Kiri, and the faithfulness and reliability of Caesar.

After some operation, the Metropolitan Police Department will definitely be able to regain a lot of credibility that it has lost.

Minister Odakiri was extremely pleased with this success.

He even called Lin Xinyi overnight to express his commendation, and wanted to hold a celebration meeting for him in the Criminal Department, and officially hired him as the management officer of the forensic section by the way.

But Lin Xinyi politely refused the so-called celebration meeting for the time being.

Because, for him, this arrest operation is far from over.

Or rather, this is just the beginning.

...................................................

The next day, early Sunday morning.

Kasumigaseki, Metropolitan Police Department Building, 5th floor.

This is the territory of the Scientific Search Institute under the command of the Criminal Department.

The Institute of Scientific Investigation, or Scientific Research Institute for short, is responsible for the use of science and technology to conduct forensic work, and is a sibling department closely related to the forensic section.

The forensic section is equivalent to the technical investigation center of the domestic police department, and the scientific search and research department is equivalent to the forensic identification center.

Although the science search research in this science world is far less powerful than the science search research in reality, at least...

DNA identification, poison identification, document identification, and identification of unknown substance components can still be undertaken in these basic identification work.

"Lin, did you find anything by calling me here?"

The great detective Kudo hurried to the Kosoken early in the morning.

He slept very well after going back last night, and was woken up by Lin Xinyi's call for help this morning.

Although he had to go on a date with Xiaolan at Dorobika Paradise at noon, when he heard Lin Shinichi say that there was a new development in the case that had failed last night, Kudo Shinichi still rushed over without hesitation.

"There are indeed some discoveries."

"I just called you over to help with reasoning."

Lin Xinyi said very calmly.

He knew that in terms of reasoning alone, Kudo's level was indeed higher than his.

"Oh?" Kudo Shinichi asked curiously, "What exactly did you find?" ”

"Nails."

"After I came back yesterday, I asked someone from the department to help identify Kidd's nails and nail dirt overnight."

As the commander-in-chief of the operation holding the sword of the Minister of Crime, Shang Fang, yesterday Lin Xinyi not only mobilized the equipment of SIT and the police dogs of the identification section, but also asked the appraisers of the scientific search and research to stay up late and work overtime at the Metropolitan Police Department.

As a result, the research institute helped identify the nail scale composition of the strange thief Kidd:"

"In addition to its own skin flakes, there are also graphite, clay, rubber, calcium sulfate and other substances in it."

Lin Xinyi slowly said the appraisal results of the scientific search research.

And Kudo frowned, and suddenly caught something from it:

"Graphite, clay, these two things are... The main ingredient of pencil leads! ”

"Rubber, on the other hand, is the main ingredient in erasers."

"You mean, Kidd the Monster Thief has used pencils and erasers in the last few days?"

"That's right."

"The composition of human nail scale changes every day."

"Kidd's nails contain graphite and clay, indicating that he has only used pencils and erasers in the past two days."

Lin Xinyi nodded seriously, and said solemnly:

"So, I speculate that Kidd's true identity should be a male high school student."

"Huh?" Hearing such a jumpy inference, Kudo immediately pointed out the loophole: "That's not right, right? ”

"I've used a pencil and an eraser, so how can I confirm that I'm a high school student?"

"People who use pencils and erasers are everywhere in all ages and professions!"

Unlike in China, the mechanical pencil culture is very prevalent.

In China, only primary school students and students majoring in drawing will often use pencils, but in this book, elementary schools, junior high schools, high schools, and even many college students and office workers are very fond of using mechanical pencils to take notes.

Based on the fact that he used a pencil and an eraser, there is no way to deduce that Kidd the Strange Thief is a male high school student.

"Of course, it's more than that."

Lin Xinyi smiled lightly and added:

"But I can confirm that Kidd the Strange Thief is a male high school student, and it's actually because of that little nail."

"First of all, women's nails and men's nails are different in appearance:"

"The surface of the female nail is smoother, the color is lighter, the longitudinal crest of the nail is fewer, lower, smoother, the distribution is denser and more parallel than that of the male, and it has better regularity than the male."

"So, just by looking at that nail, I knew that Kidd must be a man."

"Hmm." Kudo Shinichi nodded:

It's easy to understand how gender can be judged by fingernails.

"What about high school students? How do I know for sure? ”

"Confirm it from the thickness of the nails."

Lin Xinyi replied methodically:

"As people age, their nails gradually thicken and darken in color."

"The average person's nail thickness is 0.5~0.75 mm, and the nail thickness of a 15~30-year-old person is about 0.5~0.6 mm."

"And Kidd the Monster Thief's nails are only 0.51 millimeters thick."

"So, I can boldly speculate that he is very young and narrow down the estimated age to 15~20 years old."

"I see..."Kudo Shinichi pondered for a moment, and then instinctively asked, "However, this can't rule out the possibility that Kidd the Strange Thief is a college student, right?" ”

"It really can't be completely ruled out."

"But, he's most likely a high school student—"

"Because of calcium sulfate, as I said before, he still has a lot of calcium sulfate in his nail scale."

"And calcium sulfate is the main ingredient in chalk."

"So Kidd the Monster Thief has not only used pencil erasers in recent times, he's also used chalk, or, helped erase blackboards."

Lin Xinyi came up with his own reasoning process, and was worried that the national conditions were different, so he specially asked Kudo:

"Kudo, you also have a duty student in high school, right?"

"There's... Follow the roster and rotate one per day. Kudo nodded.

And he completely understood what Lin Xinyi meant:

The ones who will leave a lot of chalk ash in their nails are none other than teachers and students who use chalk a lot.

In college, teachers rarely ask students to go to the blackboard to do problems.

The work of wiping the blackboard is also done by the school property staff, and the students on duty as students are not left responsible.

"So, Kidd the Strange Thief is a male high school student who has only recently been exposed to chalk, pencils, and erasers."

"Judging from the fact that there is a lot of chalk ash between his fingers, it is very likely that he is also the student on duty who has been responsible for cleaning for the past two days."

Kudo briefly summarized Shinichi's reasoning.

At the same time, Kudo couldn't help but feel slightly surprised:

Unexpectedly, a small fingernail could expose so much information to the mysterious monster thief Kidd.

This kind of scientific investigation technique that he had never been exposed to was even more powerful than he imagined.

"Kudo."

After Lin Xinyi finished talking about his discovery, he said:

"I asked you to come over this time, mainly because I want you to help narrow down the scope of the investigation."

"After all, there are so many high schools in the whole world... Even if we narrow down the scope to Tokyo first, the workload of so many high schools will be too large. ”

"Troubleshooting? How are you going to check? ”

Kudo didn't answer directly, but asked curiously:

"You can't just drag every male high school student to do DNA and fingerprint comparison, right?"

"It's simple."

Lin Xinyi replied calmly:

"Priority check the list of students on duty for these two days."

"If the student on duty can't find out the result, go directly to the school to check-"

"I've saved the smell of Kidd the Thief, and I can get Caesar out of the horse when the time comes."

Yes, human scents can be stored for a long time.

Activated carbon is used to absorb odors from items left by the suspect, and stored in vacuum or freezing, which can effectively store odors for 6 months ~ 3 years.

Even if the "antique" smell has been preserved for 3 years, the success rate of police dog identification is more than 50%.

"It's okay..."

Shinichi Kudo once again gained a lot of insight.

Then, with a slight smile, he said with a little playfulness:

"In that case, we should be able to find Kidd the Monster Thief soon."

"Oh?" Lin Xin was surprised:

Could it be that Kudo has been able to pinpoint the scope of the investigation to a specific high school?

A detective deserves to be a detective, how is this deduced?

"Cipher."

"It was the code that Kidd left on the clock dial that completely exposed him."

Shinichi Kudo gave the answer.

Cracking codes is his specialty as a detective.

Lin Xin was confused when he saw the code, but Kudo Shinichi was able to decipher the truth from the code in one second:

"Replace the Kidd Ring's Alpha Alpha code with a romanized accent."

"Then move the vowel one place in a clockwise direction to pronounce it."

"It's going to be—"

"'I'm not going to hand over the bell.'" ”

Kudo paused slightly, and a smile appeared on the corner of his mouth:

"This guy's goal is not to steal diamonds at all, but to use this code to prevent the demolition of the clock tower."

"Our Mr. Kidd seems to have a lot of affection for this old bell tower in Jianggutian Town."

"That is to say..."

Hearing this, Lin Xinyi's eyes suddenly lit up:

"That guy is probably a native of Jianggutian Town?"

"And our primary target is..."

He and Kudo looked at each other and said the answer at the same time:

"Ekoda High School!"