In Conan, people have a brain option system

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

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

the safest and most reliable way for Kaito Kid to reasonably contact the Scarlet Shadow Heart was to blend into the police of the Second Investigation Division.

'Assuming that one of the two is Kaito Kid, he might knock the other one unconscious after entering the collection room. '

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

Conan thought to himself.

Conan glanced at Amuro Toru not far away, and found that the other party was also watching the two policemen who entered the collection room, so he retracted his gaze.

'It is difficult to destroy the display cabinet of the Scarlet Shadow Heart by physical means, unless Kaito Kid can cut off the metal base of the display cabinet 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 Kaito Kid, who was disguised as Tsukino Takashi, who she had just met in the collection room, had been observing the structure of the entire display cabinet.

It seems that Kaito Kid obviously does not know the password to open the display cabinet.

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

With Kaito Kid's flexibility and ability to escape, it would be difficult to catch him if he was not prepared in advance.

It would definitely take some time for Kaito Kid to crack the password.

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

Then he must limit the other policeman's ability to move, which also requires some effort.

As long as Conan and Amuro Toru catch Kaito Kid trying to open the display cabinet, they can block him before Kaito Kid escapes.

——

At the same time, in the collection room of Scarlet Shadow Heart.

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

He also thought that Conan hid to ambush him. This smart little detective must have made some preparations in a place where he could not see.

Conan's plan might be effective in ambushing himself.

But since he had disguised himself as Nakamori Ginzo and sneaked into the police, all of Conan's actions were clear at a glance.

Kuroba Kaito knew that even if he asked other policemen 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 curious about how Conan would ambush him and had expectations in his heart.

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

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

Kuroba Kaito said to the policeman next to him in a casual tone.

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

The policeman next to Kuroba Kaito replied.

"Aren't you worried that I 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 police said.

Kuroba Kaito nodded and looked very satisfied with his answer.

Then he instructed the police:

"Go and confirm whether the camera is working properly, and I will check the display cabinet."

"Okay."

The policeman next to Kuroba Kaito did not doubt him and turned to check the camera.

Kuroba Kaito took advantage of the policeman's body blocking the camera and squatted down to open the cover of the display cabinet again.

See the numeric keypad buttons inside.

'During this period, the display cabinet has been opened at least three times. '

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

'Since the policeman just said that, the person who touched the password of the safe must be the uncle. '

'The uncle's awareness of prevention is pretty good, and he protects the password very well, but there are still some small mistakes. '

Kuroba Kaito thought in his heart.

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

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

So even during the on-site investigation, he didn't need to do it himself.

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

Among these personal belongings, there were no gloves.

Kuroba Kaito knew Nakamori Ginzo's itinerary.

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

Later, he was tricked by himself to the collection room of venue D, and then returned here after hearing the broadcast of venue 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.

It was under this circumstance that Nakamori Ginzo didn't even have gloves in his pockets.

That means he doesn't have gloves at all.

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

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

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

Therefore, it is necessary to use filter glasses to eliminate the interference of stray light.

When faced with situations such as the need to crack the password of a safe box, this method can well know the keys used by the original owner to open the password.

After Kuroba Kaito put on the filter glasses and illuminated the buttons with a laser light.

Immediately I noticed that several buttons were lighting up.

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

'This display case is undoubtedly a four-digit code. ’

‘But except for the [#] key used to confirm after entering the password, there are only three numeric passwords left. ’

‘This means that one number has been used twice. ’

‘You have to try at most 36 times’

Kuroba Kaito sighed in his heart and lamented his bad luck.

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

But now a number is used twice, so the number of possible password combinations becomes 36.

Moreover, this kind of advanced password system basically has the function of automatically locking or alarming if you enter a certain number of incorrect entries.

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

Looking at these three numbers, Kuroba Kaito suddenly had an idea out of nowhere.

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

Then pressed the [#] key again.

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

at the same time.

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