Saturday, February 1st, afternoon, the study of the Tsujimura family.

Looking at a slit in the open keychain, the Twilight Police Department asked, "What is this for?"

"I don't know yet. "But you can put a needle in it, maybe ......."

"You mean to put a poison needle in it?" the Twilight Police Department asked rhetorically, "But if a poison needle only has one eye, how can it be two millimeters long?" and after stabbing Mr. Tsujimura with the poison needle of this keychain, he put the key into the right pocket of Mr. Tsujimura's pants from outside the door. No kidding, how is this possible?"

Possibly, Heiji Hattori thought to himself, if there was that thing long enough.

"Wait a minute, Dusk Police Department. "Mrs. Gongjiang has the same keychain there." ”

"And how is she going to do it, in front of so many of you?" asked the Twilight Police Department, "It's still possible that she was poisoned early in the morning, but isn't that a denial from you?"

"That's what Yamazaki said. Maori quickly explained.

Stupid, I said it just now, the bleeding has stopped, it's been at least two minutes, how can it be Mrs. Tsujimura Gongjiang who came in with us. Hattori Heiji said in his heart, it seems that my reasoning is correct, this uncle's reasoning is not his thing at all, it is Kudo Shinichi's, it must be this mediocre uncle who uses his daughter to restrain Kudo, every time he encounters an incident, he secretly contacts Kudo, seeks Kudo's assistance, and changes Kudo's reasoning to his own, and some events even if Kudo tells him, he can't understand it, he can only follow Kudo's reasoning step by step, like the incident of the ski mountain, that reasoning, from beginning to end there is a smell of Kudo Shinichi. This time is no exception, very good, this secret room murder incident, who will solve it first, let's see. Thinking of this, Heiji Hattori went out.

Seeing that Hattori had gone out, the Twilight Police Department asked, "Maori, have you thought of anything?" How were the sleeping pills ordered, and where was the murder weapon?"

"No," Maori said, "I don't have a clue at all. ”

If it was a needle, the wound wasn't completely unreasonable, Conan thought to himself, but as Hattori said, it would take a few minutes for that wound to stop bleeding on its own. Ah, what's going on, my head is so dizzy.

Seeing Conan's shaky and poor face, Lan stepped forward and asked, "Conan, what's wrong with you, your face is so bad?" As he spoke, he picked up Conan and asked the people from the Tsuji Village, "Can you borrow a room, and what is the doctor's phone number?"

"Come to my room. Takazen Tsujimura said as he led the way.

In Lan's arms, lying on Lan's shoulder, Conan inadvertently found that there was a very familiar small box on the top of the bookcase, and if he hadn't been picked up by Lan, he wouldn't have seen it.

Yamazaki, this guy, Conan barely pulled a smile, it seems that this incident is like that. The photo next to it, no, the eyes are blurry.

At this time, Hattori Heiji came back with a smile, thinking to himself that I had won this game, and said with a smile: "I know the methods of the secret room and who the murderer is." ”

As Ran passed by Hattori's side, Conan vaguely saw some fishing line peeking out of Hattori's pants pockets.

"Hattori, are you serious?" asked the Twilight Police Department.

"Now let me see the evidence. Heiji Hattori said, "Please borrow Mr. Tsujimura's keychain." Then he asked, "Can you hold it in your hands?"

The Twilight Police Department looked at the forensic officer, who nodded and said, "Yes, all the fingerprints on this have been collected." ”

Maori asked, "Oh, did you find anything?"

"The fingerprint on the top of the key is the fingerprint of Mr. Tsujimura's right thumb, and the other fingerprints are covered. "No other people's fingerprints were found anywhere else." ”

After borrowing the key, Hattori Heiji smiled and said, "Dusk Police Department, please pretend to be Mr. Tsujimura and sit behind the desk." ”

"Me?" asked the Twilight Police Department.

Hattori Heiji smiled, "Yes, you guys are more similar in size." ”

"Okay. The Twilight Police Department said with triangular eyes puffed up.

"This study is supposed to be soundproofed, it's a secret room, but when we came, we heard music while standing at the door of the study, why is that? That is to say, the inside of this room, which should be completely sealed, is not completely sealed. Heiji Hattori closed the door of his study, pointed to the crack under the door, which was about five millimeters, and said, "This is the gap." ”

"This gap?" said Maori, reaching out and trying, only to let his fingertips pass.

Hattori Heiji smiled, "As long as this key can pass." As he spoke, he shoved the key in, let the key and the key chain pass one by one, and then went out and got the key back.

"And how did the key end up in Mr. Tsujimura's right pocket?" asked Maori.

Hattori Heiji smiled: "It's very simple, as long as you have a fishing line with a needle and tape, and an extra fishing line, of course, these fishing lines should be long enough." Then he explained as he did it.

After Mr. Tsujimura had fallen asleep in his chair, he threaded the fishing line with the needle through his trouser pocket, taking care to connect the other end to the keychain from the mezzanine, taped it and walked out of the door with both ends. Wrap the middle part of the other line around the key and keychain, let the key and keychain pass through the crack of the door in turn, and then slowly pull the line with the needle while tightening the other line to make the key and keychain together. Just pull the fishing line with the needle all the time, and the whole key will go into the pocket along the line, and then as long as you pull hard, the fishing line will fall off the tape, and you can pull out the door, and the other fishing line only needs to loosen one end and pull the other end, so that both fishing lines will come out of the room, and this murder will become a secret room murder. ”

The Twilight Police Department was very surprised and said, "It's, it's really in." As he spoke, he carefully took the key out of his pocket.

And the key and the keychain were closed, just as they had been taken out of Mr. Tsujimura's pocket. Heiji Hattori came in from outside the door and smiled, then said, "It takes about two to three minutes for this to happen, which is exactly the time to stop the bleeding on its own. ”

The Twilight Police Department asked, "And who is the prisoner?"

Why haven't you come yet, Heiji Hattori thought to himself, Kudo, have you given up?, and asked, "Did you find something that was charged?"

Seeing that the Twilight Police Department nodded, the forensic officer said, "Not yet." ”

Heiji Hattori asked, "Did you find any wet cups or cutlery?"

The forensic officer said, "No, there are only two cups in use in this main house, which belong to Mr. Takazen Tsujimura and Miss Sachiko Katsuragi, and the other cups and cutlery are dry. ”

"Very well, the evidence is sufficient. First of all, the prisoner is not Mrs. Tsujimura Gonge. Secondly, Mr. Fumio Koike had been out all the time, and had returned with Mr. Takazen Tsujimura and Miss Sachiko Katsuragi, and the three of them had only returned shortly before we arrived here, which meant that there was no time to deal with the drugged things. Hattori Heiji smiled, "So the prisoner is ......"

"Mr. Tsujimura!" said Maori, surprised.

"Yes, the prisoner is Mr. Tsujimura, who opened the door and let Mr. Tsujimura drink the added drink, then packed up the cup and came back to implement the whole plan. Then Mr. Takazen Tsujimura and Ms. Sachiko Katsuragi came upstairs, and he went to the next door to roll up the messy and easy-to-spot fishing line. When Mr. Takazen Tsujimura and Ms. Sachiko Katsuragi were gone, he came out of the next door with a packed fishing line, and then when he went downstairs, he ran into us, pretended that nothing had happened, went to the Japanese-style room, and hid the line. "The evidence is two fishing lines of the right length, as well as a needle, which I found in the Japanese-style room." "Speaking of this, I thought, Kudo Shinichi, I won this game.

At this time, Lan hurriedly came in, "Dad, have you seen Conan?"

"No," Maori asked, "what's wrong?"

Lan said anxiously, "The doctor is here, but Conan doesn't know where to go." Then I remembered what had just happened. ……

Time pushed forward, Ran put Conan on Mr. Tsujimura Takazen's bed, looked at Conan with a painful face and said, "Conan, the doctor will be here soon, you cheer up a little." ”

At this time, the doorbell rang, and Lan said happily: "It must be a doctor, Conan, you hold on a little longer." With that, he went out.

However, when the doctor came, Conan was gone, and Lan searched the main house but couldn't find it, so he came here. ……

At this moment, a wheezing, very tired voice sounded from the doorway, "No, the prisoner is not him. ”

This, this voice, Lan hurriedly looked back, and sure enough, it was that guy, that bastard, that worrying bastard.

"Kudo!" said the Twilight Police Department overjoyed, "You're finally here." ”

"Shinichi. "Maori is taken aback, bastard, what is this guy doing here? Ah, my business, my high-end restaurant.

"Shinichi, where the hell have you been, I, I thought you were gone. Lan stepped forward and asked, "Do you know how worried I am?" and tears flowed from his eyes as he spoke.

"Fool, what are you crying about? Kudo Shinichi said with a smile.

Is this Shinichi Kudo? Heiji Hattori asked, "Since you said it wasn't him, then you mean to say that my reasoning was wrong?"

"Wait a minute, Ran," Kudo Shinichi said with a smile, "Right away." ”

"Tell me, what was wrong with my reasoning? Kudo. Heiji Hattori asked.

"This reasoning of yours, no, speculation, is just your imagination," Kudo Shinichi said with a smile.

Hattori exclaimed, "What? This is obviously a factual reasoning. ”

"yes, Kudo," the Dusk Police Department said, "the key did end up in my pocket. ”

"So, Dusk Police, open your pants pockets and take a good look. Kudo Shinichi smiled, and then said to Heiji Hattori, "You overlooked one thing. ”……