A total of thirteen calls were recorded, two of which were made by Mr. Morioka. The ten phone calls www.biquge.info Pen Fun Pavilion were made by Mr. Shirakura. Another call was a sales call. However, Yi Bin's memory is very good, and he can tell that the last sales call was made by Vodgart of the Black Organization.

And Vwagart's voice, Yi Bin knew that Xiao Ai also heard it.

Because Yibin obviously felt that when the last recording was played, Xiao Ai suddenly became nervous.

Yibin turned off the play button of the phone recording, got up and walked to Xiao Ai and hugged her.

"Don't be afraid, even if the people of the organization appear here now, I will be able to keep you and your sister safe." Yi Bin patted Xiao Ai's back with his hand and whispered in her ear.

And Xiao Ai, who had been comforted by Yi Bin, was obviously calm.

Xiao Ai blushed and looked at Yi Bin, who turned around and left to continue investigating the scene: Why do I feel relieved to be held by him.

Yi Bin crouched down to look at the study key that was pressed down by a hard-shell book, and the several chess pieces scattered around the hard-shell book.

After pondering for a while, he came to the phone that had fallen to the ground and squat down, took out the tape from the phone, and sure enough, he found that the tape of the tape had a very obvious wrinkle. This should not be the case under normal circumstances.

And, on top of the tape, there's something special.

"Mrs. Hirota, would you please invite a few other guests who have been here today?" Officer Yokozo is asking Mrs. Hirota to assist the police in their investigation.

"No need, Officer Yokogou, I already know the murderer's method of arranging the secret room and the murderer's true identity." Yi Bin stood up and interrupted Officer Henggou.

"What? Do you already know the murderer's modus operandi? Do you know who the murderer is? How could it be! Officer Henggou looked at Yibin in surprise.

It's something that can't be helped. At this time, the police were still collecting evidence, and now they were all clueless, and Yibin actually knew the identity of the murderer. This had to surprise the cross-ditch though.

"Yes, but before we do, I'll have to ask someone to buy a new cassette tape for the phone. Also, keep this tape away, it's important evidence. Yibin handed the tape he took out of the phone to Officer Henggou.

"Oh. Good. Officer Henggou took the tape and packed it in a sealed bag.

"You. Hurry up and buy a new tape. Officer Henggou called one of his men and ordered.

"Yes!" The policeman answered and ran out.

"So, Bo Feng, why don't you invite a few other people here? Could it be that the murderer is in this room? Officer Yokogou suddenly realized something in the middle of speaking.

"That's right, Officer Yokogou, that's what you think. The murderer is Mr. Shirakura. Yibin pointed to Bai Cang, who was still standing at the door, and said.

"What are you kidding, don't talk nonsense, I'm just here, how could I kill the doctor!" Bai Cang heard Yi Bin actually say that he was the murderer. Immediately excitedly argued.

"Hmph. You don't have to rush to defend yourself first. I would say that you are the murderer, then you must have the evidence. Yibin looked at Mr. Shirakura and sneered.

"So, if the murderer is him, then how on earth did he create this secret room?" Yokogou asked curiously.

"It's simple. Just make use of the phone with the recording function, the chess pieces, and the hard shell book. It can be done. ”

"So how do you do it with all this?" Officer Henggou still asked puzzled.

"First, take out the tape from the phone, pull the tape of the tape out of the appropriate length, pass the tape through the keyhole, and put the tape back into the phone."

"The next thing is to pull the tape through the keyhole and through the crack in the door to the door. If you leave it outside the door, return the tape through the keyhole to the room where the laptop had fallen. ”

Next, the three chess pieces are placed on the ground in a triangular pattern, and then the tape is trapped on the chess pieces near the phone. Then place the hard-shell book on top of the chess pieces. Then turn the pieces upside down. ”

"Finally, as long as you lock the door with a key from the outside, and then use the phone to keep calling the phone in the study, the phone answering machine will automatically pull the key back into the room."

"Finally, when the key passes under the hard-shell book on top of the chess, the tape will pull the chess pieces down, and the hard-shell book will fall and press the key under the book, so that the secret room is arranged." Yi Bin explained the method of arranging the secret room step by step.

"Is this really possible?" Although it seemed that there was no problem after listening to what Yibin said, Officer Henggou still asked with a hint of skepticism.

"Absolutely." Yi Bin replied confidently.

"Officer Henggou, I've already bought the tape." At this time, the officer who had gone out to buy a new tape happened to run back.

"That's right, then let's experiment and see." Seeing that the new tape had been bought, Yibin said indifferently.

Yibin took the newly bought tape from the policeman, and then made it step by step according to the method he said before. The end result was exactly the same as he had said before.

"Mr. Officer, this is the method that can be used to set up the secret room at the scene, but I can't be assumed that I am a murderer just because I make more calls." Mr. Shirakura is still making his last struggle. After all, Yibin did not come up with conclusive evidence.

"Mr. Shirakura, do you want to continue to quibble? Didn't you come back here just to get back the evidence that you were the murderer? Yi Bin looked at Bai Cang with disdain.

The bad things that have been done are not only discovered by others, but they also dare not admit it after being discovered. This kind of person who lacks IQ and dares to be the one who dares not to be, Yi Bin is the most despised.

"Officer Yokogou, when I checked the tape just now, I found that there were obvious fingerprint marks on it. You know, tape is the easiest thing to leave marks on it. I think that if you compare it, you can find that it is Mr. Shirakura's fingerprints. Yibin looked at Officer Henggou and said.

Finally, after examination, Mr. Shirakura's fingerprints were found on the tape of the tape.

And Mr. Shirakura himself finally confessed to his crime. He killed Dr. Hirota on impulse during an argument with Dr. Hirota.

But since he killed someone, and he was caught. Whether it is impulsive or preciously planned, it must be punished by law.

In the end, Yibin took all the tapes taken by Bai Cang from Officer Henggou and looked at them, but he did not find the magnetic sheet that recorded the drug information. I'm afraid it was taken by Vwagart before that.

The trio, who did not receive APTX4869 relevant information, had no choice but to drive out of Dr. Hirota's home in a frustrated car.