In Conan, people have a brain option system.

Chapter 260 Password (22)

The behavior of the two policemen naturally attracted Conan's attention.

He knew that since Kaito Kidd's purpose had been exposed to him and others,

If Kaito Kidd wants to get in touch with the Scarlet Heart in a reasonable way, the safest and most reliable way is to infiltrate the police officers of the Second Investigation Section.

"Assuming that one of the two is Kaito Kidd, he might have knocked the other one unconscious after entering the collection room."

'Then take the opportunity to attack Scarlet Shadow Heart.'

Conan thought to himself.

Conan glanced at Toru Amuro who was not far away, and found that he was also staring at the two policemen who entered the collection room, so he looked away.

"It is difficult to destroy the display case of the Scarlet Heart physically, unless Kaito Kidd can cut off the metal base of the display case and take it away."

'Thinking about it this way, entering the correct password is the most convenient and quickest way to get the Scarlet Shadow Heart.'

Conan heard Sera Masumi mention that the Kaito Kid, who was disguised as Tsukino Takashi and whom she had just met in the collection room, had been observing the structure of the entire display cabinet.

From this it seems that Kaito Kidd obviously doesn't know the password to open the display cabinet.

Otherwise, he could have just opened the display case, taken the gems and ran away.

Given Kaito Kidd's flexibility and ability to escape, it would be difficult to catch him if you are not prepared in advance.

It will definitely take some time for Kaito Kidd to crack the code.

If he was really one of the two policemen who entered the collection room at this moment.

Then he would have to restrict the other policeman's ability to move, which would also take some effort.

As long as Conan and Toru Amuro catch Kaito Kid trying to open the display cabinet, they can stop him before he escapes.
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At the same time, inside the Scarlet Shadow Heart's collection room.

Kuroba Kaito had already noticed that Conan had hidden in the crowd.

He also thought that Conan was hiding in order to ambush him. The clever little detective must have made some preparations where he couldn't see.

Conan's plan to ambush himself might have some effect.

But since he had disguised himself as Ginzo Nakamori and infiltrated the police in advance, all of Conan's actions became clear at a glance.

Kuroba Kaito knew that even if he asked other police officers to go into the collection room with him, it would definitely arouse Conan's suspicion.

But Kuroba Kaito did not feel the slightest bit of fear.

Instead, he was looking forward to it because he was curious about how Conan would ambush him.

"Mr. Tsukino kept saying that the security of Scarlet Heart was foolproof, but the password was still leaked."

"This makes me a little worried now, maybe there are other people who know the password."

Kuroba Kaito spoke to the policeman beside him in a chatty tone.

"There shouldn't be anyone else, unless Mr. Tsukino leaked the password to someone else, otherwise how could it be known by Kaito Kidd?"

The police officer next to Kuroba Kaito replied.

"Aren't you worried that I might have leaked the password?"

Kuroba Kaito asked with a smile.

"Officer Nakamori, you are the least likely one because you didn't let us see when you entered the password at noon."

"How could Officer Nakamori, who has such a sense of defense, leak the password?"

the policeman said.

Upon hearing this, Kuroba Kaito nodded, looking as if he was very satisfied with his answer.

Then he instructed the policeman:

"Go make sure the cameras are functioning properly while I check the display cases."

"it is good."

The policeman next to Kuroba Kaito didn't suspect anything and turned to check the camera.

While the policeman's body was blocking the camera, Kaito Kuroba squatted down and opened the cover of the display cabinet again.

I saw the numeric keypad buttons inside. 'During this period, the display case has been opened at least three times.'

'When Takashi Tsukino first put the gem in, when the gem was stolen by a thief at night, and when the gem was returned and put back in.'

"Since the police officer just said that, the person who touched the combination of the safe must be the uncle."

'The uncle had a pretty good sense of security and protected his password very well, but he still made some small mistakes.'

Kuroba Kaito thought in his heart.

Then he took out fluorescent dye from his pocket and sprayed it on the buttons of the password box, and then took out a pair of filter glasses and put them on his eyes.

Although Ginzo Nakamori is also responsible for on-site investigation, he is, after all, a police officer with the rank of inspector.

Therefore, even during on-site inspections, he does not need to do it personally.

After knocking Ginzo Nakamori unconscious and taking off his clothes, Kaito Kuroba checked Ginzo Nakamori's personal belongings.

Among these personal items, there were no gloves.

Kuroba Kaito knows Nakamori Ginzo's itinerary.

He first returned the gems to the collection room in Hall B, and then came to the collection room in Hall C.

Later, he was tricked by himself into the collection room of Hall D, and then returned here after hearing the broadcast from Hall B.

Since Nakamori Ginzo was able to hear the broadcast he made specifically for the collection room of the Yuehua necklace, it means that he had already or was in the process of investigating the scene at that time.

Even in this situation, Ginzo Nakamori didn't even have any gloves in his pockets.

That means he doesn't have any gloves at all.

In this case, when Ginzo Nakamori entered the password in the afternoon, the oil on his fingers and the amino acids in his sweat would stick to the password keys.

Then you just need to treat the surface of the key with a fluorescent agent, and then irradiate it with an ultraviolet light source, and the fingerprint will fluoresce.

But one thing to note is that this type of fluorescence has a lot of stray light.

Therefore, you need to use filter glasses to eliminate the interference of stray light.

When faced with a situation where the password to a safe box needs to be cracked, this method can provide a good understanding of the keys used by the original owner to open the password.

After Kuroba Kaito put on the filter glasses and shone the laser light on the buttons above.

I immediately noticed that several buttons were lighting up.

The buttons are [1], [2], [4], [#]

'This display cabinet is undoubtedly a four-digit code.'

'But apart from the [#] key used to confirm after entering the password, there are only three numeric passwords left.'

'This means that a number has been used twice.'

"You have to try 36 times at most."

Kuroba Kaito sighed in his heart, lamenting his bad luck.

If you can see that the password uses four different numbers, then there are only 24 possible combinations of the password.

But now one number has been used twice, so the possible password combinations become 36.

Moreover, this kind of advanced password system basically has the function of automatically locking or alarming after a certain number of incorrect inputs.

In other words, if you can't guess the password within 3-5 times, you basically have no chance.

Kuroba Kaito looked at these three numbers and suddenly an idea popped up in his mind for no reason.

He reached out and pressed the numbers [1], [4], [1], [2].

Then press the [#] key again.

Immediately afterwards, he heard a clear and rapid "beep, beep" sound, followed by the sound of mechanical gears turning.

Simultaneously.

A strong sense of crisis arose in Kuroba Kaito's heart, along with a rapidly soaring heart rate.

(End of this chapter)