Chapter 637: The Girl in the Decryption Room

January 5th, Tuesday, evening, Hirota Masami's house.

Hirota Toshiko went to make a phone call, and a police officer came over and reported, "Henggou Police Department, a young man named Bai Cangyang came outside."

"Let him in," said the Henggou Police Department. "If there are Hosoya Kazuhiro and Morioka Michio, let them in too."

After Bai Cangyang came in, he was shocked to know that Professor Hirota had been killed.

Soon after, Hoshiya, Hiroshi and Morioka Michio also came, and they were also surprised when they learned that Professor Hirota had been killed.

"Mr. Baicang, Mr. Morioka, what's the matter with this phone recording?" The Henggou Police Department played the phone recording again.

"I'm Morioka. I'll be there at six o'clock this afternoon. Set up the chessboard and wait for me. It's four fifty-one o'clock in the afternoon."

"Professor, I'm Bai Cang, please call me back as soon as possible." After a while, "5:31 p.m."

"I'm Morioka. Since you're not here, I'll go back. Really, I didn't say anything earlier if I drank too much. It's 6:03 in the afternoon."

"I'm Bai Cang, because I'll be busy starting tomorrow, so I'll go to your place from here. It's 6:07 in the afternoon."

The Henggou Police Department asked: "Mr. Bai Cang, the first call was interrupted for nearly a minute. Why?"

"Oh, I just forgot to hang up the phone." Bai Cangyang said.

"That's it." The Henggou Police Department said, "Then, did Professor Hirota call you back?"

"No, I'm just here to try my luck." Bai Cangyang said, "I'm working as a model now, this time the magazine is planning a project, and I suddenly remembered a photo I took with Professor Hirota when I was in college, so I decided to If you come to borrow the floppy disk with that photo from the teacher, even if the professor is not there, as long as the wife is there, it will be fine."

"Floppy disk?" Henggou Police Department asked.

"My husband has the habit of saving things to floppy disks." Hirota Toshiko said, "Favorite photos, university entrance exam questions, student transcripts, and even his history of playing chess with Mr. Save it."

"So that's it." Henggou Police Department asked, "What about this floppy disk?" He went to the computer desk to look, but found no floppy disk, then opened each drawer to look, and found no floppy disk either.

"It seems that this is the motive for the murder." Henggou Police Department said, and then asked Tomoko Hirota, "How many floppy disks are there?"

"This," said Tomoko Hirota, "I don't know the details. Anyway, there are a lot of them. It must be more than a hundred."

The Henggou Police Department asked the forensic personnel to check the computer, and then asked Morioka, "From the phone recording, have you been here?"

"Yes," Morioka said. "It was about six o'clock in the evening when I came. The entrance door was unlocked. I rang the doorbell but no one answered. I thought he might be taking a nap after drinking too much, so I went in by myself." I came here, but when I knocked on the door of the study room, no one answered, and the door of the study room was locked again. I thought the professor fell into a deep sleep because of the drink at noon, so I went back."

"How did you know about Professor Hirota drinking at noon?" Henggou Police Department asked.

"I would also like to participate, but there is something temporary." Morioka Michio said.

The Henggou Police Department asked, "Mr. Hoshiya, why did you come here?"

Hosoya Kazuhiro said: "My daughter recently decided to apply for Nanyang University.

So I came here to ask the teacher to write a recommendation letter. I didn't expect the teacher to drink a lot of wine, so I left a floppy disk and went back. It contained my daughter's information. "

The Hengmizo Police Department said: "Mr. Hoshiya, your daughter is going to apply for Nanyang University, so if you get the floppy disk with the entrance exam questions, it will not be a problem to pass the exam."

"No, no, that's not the case. I haven't even thought about such a thing." Hosoya and Hiro said.

Henggou Police Department asked: "So, when did you leave?"

"I stayed here for five minutes, no, ten minutes, at most fifteen minutes." Hosoya and Hiro said.

"So, where did you go after that? Do you have an alibi?" Henggou Police Department asked.

"Alibi?" Hosoya and Hiro asked, "Is my receipt from the parking lot okay?" He said and took out the parking receipt.

The Henggou Police Department looked at it, "The time of this receipt is around 4:22, how far is the parking lot from here?"

"A few minutes away." Hosoya and Hiro said.

"There is still a lot of suspicion." The Henggou Police Department said.

"Officer, you can't do this, don't forget, besides us, there may be other people here." Hosoya and Hiro said.

"Yes, officer," Morioka asked, "I have work tomorrow morning, can I go back?"

"Mr. Morioka, you can't go back. You said you were here just now, but in fact there is no fingerprint on the doorbell." Henggou Police Department said, "So please wait a little longer."

"What, what!" Morioka Michio was taken aback.

"How is it?" Hui Yuanai asked Conan in a low voice, "Have you figured it out? This murder in a secret room?"

"I already know who the murderer is, but I almost didn't understand the method." Conan said in a low voice, "Using three chess pieces to prop up the hard-shell notebook, and then flicking the key in through the crack of the door, it's like playing a bowling ball. Open a chess piece, so that the notebook can fall, but this only works in theory, the force is difficult to control accurately, if it is too heavy, the key will rush out of the scope of the notebook, and the phone will not work.”

"You already know who the murderer is?" Hui Yuan Ai was taken aback.

"It's no surprise," Conan said.

At this time, the forensic personnel reported that there were no fingerprints on the computer, and there were no travel photos, entrance examination questions, chess playing history, etc., which should have been deleted by someone. If you want to restore the data, you can ask someone to take it back for trial. try.

"Yes." The Henggou Police Department said, "There is no need for the tape of the phone recording, you can take it back too, and see if you can find out what the background sound is when they call."

The forensic personnel turned on the answering machine and took out the tape. Conan inadvertently found that the tape was full of wrinkles. He thought to himself, this is... Then he laughed.

Conan tugged at the corner of Dr. Ali's clothes and took him aside, "I already understand, first ask the police to prepare a box of the same tape, and then cooperate with me."

"Okay, no problem." Dr. A Li smiled, and then went to negotiate with the Henggou Police Department.

"You really want to understand?" Hui Yuanai asked.

"Yes, just wait and see, the truth about the murder in the secret room." Conan smiled confidently.

Not long after, the tape was delivered, and Dr. Ali handed it to Conan, "You do what I just said."

"Yes, doctor." Conan said, and then took advantage of Dr. A Li's block in front of him, and used the bow tie voice changer to use Dr. A Li's voice and said, "This room is indeed a perfect secret room, but if you use the tape in the telephone recorder and Three chess pieces can open this secret room."

"Are the tapes and chess pieces real?" Henggou Police Department asked happily.

"Of course, facts speak louder than words." Dr. Ali said.

Conan borrowed the mobile phone and gloves, and then started to arrange, while saying: "First pull out the tape inside the tape to an appropriate length, and then put the tape into the phone. Of course, the tape is still exposed. Then put the tape on the outside. Straighten the outer strap, walk out the door, then pass the strap through the ring above the key, then leave the key outside the door, hold the remaining strap and go back to the place where the notebook fell in the room, and then put the same height Arrange the three chess pieces in a triangle, use the front end of the strap to cover the chess piece closest to the phone, and put a notebook on it."

"It's completely nonsense. You want to use the force of the strap to pull the key, let the key knock the chess pieces down, and let the key come off the strap." Hui Yuanai said, "But the base of the chess pieces is very stable. , relying on the force of the key hitting the chess piece, it is impossible for the key to overturn the chess piece at once, but it will be pulled out of the notebook together with the chess piece.”

"What if it's upside down?" Conan laughed. "The next step is to turn the chess piece upside down. Although the top of the chess piece is round, a strong hard shell notebook like this should be able to hold it up."

Conan set up the scene, then went out and closed the door, and used the mobile phone to call the landline in the room, "then the telephone answering machine was turned on, and the tape was rolled, and this force made the key pass through the gap under the door and enter the telephone set placed in the house. Under the notebook in front of me, I bumped into the chess piece, which caused the chess piece to lose its balance, and the key remained under the notebook. If the telephone tape recorder continues to be turned on, the tape will be completely rolled back, and the evidence will disappear.” Then he went back to the room and asked, “ How's it going, is it going well?"

"Look for yourself." Huiyuan said with a sad smile, "The upside-down chess pieces can't catch the strap at all, and you simply underestimate the pulling force that the upside-down chess pieces can bear. The pawn is pulled down."

Seeing the key stuck behind the hard-shell notebook, Conan was taken aback, "How could this be?"

"Dr. A Li, is this your theory?" Henggou Police Department asked.

"This..." Dr. Ali's sweat came down.

"Leave it to me," Huiyuan said with a sad smile, "Actually, it's very simple, children can play it, just push the key in and let the notebook fall off."

"Easy?" The Henggou Police Department sweated.

"Of course." Hui Yuanai put the key on the ground, pushed it a few times with his hand, tried the strength and the sliding distance of the key, and then used the three reversed chess pieces to put the notebook in front of the phone, and then Also pull out a long enough strap, but the strap does not go around the key, and the top of the strap is covered with the corner pieces.

"Are you..." Henggou Police Department asked.

Hui Yuanai went out and closed the door, "Look at it." As he spoke, he pushed the key in through the crack of the door, then pulled the belt, then opened the door and went in. Seeing that there was only a notebook, he immediately laughed, "How about it, let the key It is not difficult at all to keep sliding on the ground in a straight line for two meters, as long as the strength is not too great, the notebook that fell due to one less chess piece being pulled away by the belt can hold down the key so that it will not run out."

"What if it doesn't work?" Henggou Police Department asked.

"Isn't there a reversed telephone behind it? If the power is strong, the key will rush through the notebook, and it will rush under the telephone, and then it will be stuck under it." Hui Yuanai said, "And there are simpler ones."

"Easier?" Henggou Police Department asked.

"This door can pass a key, and the iron wire can definitely pass," Hui Yuanai said, "And if it is two meters, there is a kind of retractable tape measure that is two meters long, and you can use that to push the key in, and you don't need to pull the tape. "

"Yes, yes, it's really very simple." The Henggou Police Department said happily, and then said, "The murderer is you, Mr. Bai Cangyang. The tape shrinks back into the answering machine before you hang up, so there's almost a minute gap in your message."

"I've said it before, I just forgot to hang up the phone." Bai Cangyang asked back, "How can it be seen that I did the trick just now? Besides, if I were the murderer, why did I come back to the scene on purpose?"

"Ah? This..." The Henggou Police Department looked at Dr. A Li.

Dr. A Li hurriedly waved behind him, signaling Conan not to chat with Hui Yuan Ai, and hurry up.

Hui Yuanai walked back to Dr. A Li, and whispered to Conan behind him, "How is it? I now know who the murderer is."

Conan muttered: "Using the tape of the tape, and turning the chess pieces upside down are all things I thought of. It can only be regarded as a tie."

"Okay, okay," Hui Yuanai chuckled softly, "I, as a big sister, will let you, my little brother."

"Speaking of which, how old are you?" Conan asked in a low voice.

"Secret." Huiyuan said with a sad smile.

"Damn it." Conan complained, then saw Dr. A Li waving behind him, and immediately said in Dr. A Li's voice with a voice-changing bow tie, "The murderer is Mr. Bai Cangyang, that's right, he found something from this house to clean up after killing Professor Hirota The evidence was collected and the scene was arranged, but he did not have an alibi, so he should reduce the suspicion on himself and create a suspect."

"Manufactured?" Henggou Police Department asked, "How is this manufactured?"...