"Why are there so many people here? What the hell is going on?" asked a handsome man in his twenties with a sunny appearance who suddenly came to Professor Hirota's study and asked everyone.

When Officer Yokogou saw a stranger coming, he raised his vigilance and said sternly to the young man, "Professor Hirota is dead! Who are you? What are you doing?"

"My name is Hiroshi Shirakura and I am a professional model. A look of surprise flashed across Shirakura's face, but he still answered Officer Yokomizo's question.

"Bai Cang?" Officer Henggou remembered that there was a man named Bai Cang who had left ten messages in the telephone answering machine before, he stared at Bai Cang suspiciously, and asked, "You are Bai Cang?" You left ten messages for Professor Hirota, don't you think it's a bit much?"

Shirakura explained, "It's just because I've called so many times that no one answers, so I'm going to come and see it in person now." ”

Shirakura told Officer Yokozo that the reason he came to Professor Hirota tonight was because his magazine had planned a program called "The Unexpected Appearance of Models", and that he remembered that he had taken a photo of a man dressed as a woman with a digital camera with a digital camera in college, so he wanted to ask Professor Hirota to pick up the photo.

This reason seems reasonable, and when the staff of the magazine go to work tomorrow, the police will reconfirm whether there is such an event.

Subsequently, Mrs. Hirota found the contact numbers of Misaki and Sheng Gang in the address book, and the police called the two as soon as they got the contact information, asking them to quickly return to the scene of the crime and receive police questioning.

After a while, Hososhi and Morioka appeared in front of the police, and Officer Yokozo first asked them about the purpose of their visit to Professor Hirota tonight.

Hosoya needed a letter of recommendation from Professor Hirota because his daughter was going to apply to Nanyang University, but he said that the professor had been drinking a lot when he visited Professor Hirota, and he didn't give him a clear reply, so he went back first.

Professor Hirota had drunk a lot of alcohol after dinner, which was confirmed by his wife.

At about half past nine in the evening, Sheng Gang came to Professor Hirota's house and found that the door to the entrance was not locked, so he went into the house to look around, but when he went to the study and found that the door was locked, he thought that Professor Hirota was asleep, so he didn't think much about it, and went home.

In addition to the production materials of APTX-4869, the missing USB flash drive also contains Nanyang University entrance exam questions, a chess game of Professor Hirota and Morioka playing chess, and a photograph of Shirakura.

Officer Henggou also had a big headache for this, because the above three people were suspected of committing crimes.

Taking advantage of the fact that Officer Henggou was not paying attention, Xingchen came to Bai Cang's side and whispered to him, "Uncle, how about I make a deal with you?"

"What?" Hakura didn't understand what a child could do with himself.

"As long as you give me the USB flash drive, I can help you get away with it!" Xingchen tempted Shirakura like a demon.

"Huh?" Hearing this, Bai Cang was shocked, but he quickly reacted and said, "I don't understand what you're saying!"

It didn't matter to Xingchen whether there was evidence to capture Bai Cang, and his primary goal was to retrieve the USB flash drive containing APTX-4869 data.

Seeing that the transaction failed, Xingchen could only shake his head helplessly.

In the original plot, Bai Cang's criminal methods were discovered by Conan, but Professor Hirota's USB flash drive was taken away by the police as physical evidence, and when Conan wanted to return to the USB flash drive, the USB flash drive had been implanted with a computer virus.

This was obviously not the result that Xingchen was willing to accept, and he stood up and said to Officer Yokozo, "Could it be that Professor Hirota brought all the USB sticks to the school? Because he didn't label the USB sticks." ”

"No matter how you look at this room, it's all a secret room, and the only key to the house was found under the notebook. The only gap in the room was under the door, but it was barely enough for the key to pass through, and if you used a rubber band or fishing line, you might be able to put the key back in the room after killing Professor Hirota, but it was unlikely to be pressed right under the notebook. ”

"Although there are many doubts about Professor Hirota's death, considering the professor's age and the fact that he drank a lot of alcohol at the time, it is not entirely impossible that he fell with the bookshelf and hit the back of his head to cause this accident!"

What Xingchen said was also a common idea of everyone present, if the case could end unexpectedly, Officer Henggou would also save a lot of trouble.

"Besides, it's not too early, we still have to go to school tomorrow!" Xingchen opened his mouth and yawned at the right time, "I'm so sleepy!"

Both Conan and Gray Plains heard what he said, the black-clad organization would come here at some point, and every second they waited at the scene of the crime would be more dangerous.

Xingchen's plan was to send Officer Henggou away first, and then secretly follow Shirakura, and finally rely on Conan's force to make Shirakura obediently hand over the USB flash drive.

Unfortunately, in Conan's opinion, Conan's actions mean that he has run out of options.

Conan always wanted to outmaneuver the stars in reasoning, and when he caught a glimpse of the Western chess pieces scattered on the ground, Conan instantly saw through the method of arranging the secret room.

At this moment, Conan does not have the threat of the Blackcoat in his head, he does not have the USB flash drive of APTX-4869, he simply wants to solve the truth behind the mystery.

"Don't you want to know the truth of the matter, this incident is not an accident, but a murder!"

"What?" Officer Henggou said in surprise, "Little friend, do you have any evidence?"

"I'm sorry, this kid just likes to play reasoning games!" Xingchen grabbed Conan's arm, trying to stop him from reasoning.

Conan decided that the stars were afraid that he would win in reasoning, and he broke free from the stars with a flick of his hand, and continued: "As long as you use the tapes of the answering machine and the chess pieces, you can complete this seamless secret room!"

"If you don't have any evidence, why don't you try it yourself?" Hearing Conan's reasoning, Gray Yuan also became interested, "Turn the fictional scene in your mind into reality!"

Hearing Gray Hara's words, Xingchen could no longer stop Conan's reasoning, so he could only open a bottle of coffee milk and sit on the sofa to enjoy Conan's performance.

Conan first instructed the officers to find a blank tape in the room, then he put on white gloves, stretched the tape, and put the tape in the answering machine.

Pull the tape strap out of the door all the time, and put the key on the tape and leave it outside the door. Then continue to stretch the tape, put the tape around the three finished Western chess pieces with a font distribution, and cover a notebook on top of the three chess pieces.