With a soft sound, Xiaobai pulled open the bookshelf curtain not far behind the sports body.

\"As I thought, there aren't a lot of books here, and no one will find out if the prisoners are hiding here.\" Shiratori walked over and looked at the bookshelf with the curtain open.

\"By the way, who is this little ghost?\" Then, Shiratori pointed to the little white beside him.

"He's Mr. Mori's nephew.\" Sato replied to Shiratori as he spoke.

"Brush...\" There was another soft sound, and Xiaobai opened the curtain next to the bookshelf.

"Hmm...\" Shiratori looked at the bookshelf on the left, then at the bookshelf on the right.

\"It's dangerous for you to do this.\" While Shiratori was thinking about something, Shiro-shiro jumped on the bookshelf and seemed to be looking for something.

'Huh?\'" Shiratori watched as Shiro jumped off the bookshelf and ran to the sports car that seemed to be looking at something.

\"It seems that he just...\" Shiratori seemed to think of something, and then also looked at the place where Shiro had just looked.

"Up there...\" Shiratori just looked at the top of the bookshelf and seemed to see something incredible.

\"In that case.\" Shiratori followed Xiaobai's footsteps again, and walked to the sports car to check something.

\"This kid... Could it be...\" After Shiratori finished checking, he looked at Xiaobai not far away, and his expression was very serious.

\"What's wrong?Officer Shiratori.\" Sato asked, looking at Shiratori with a heavy face.

\"Ah, it's okay, just found something suspicious.\" Listening to Sato's question, Shiratori replied with a smile, and then told the two places he had just discovered.

\"Looks like you already know the modus operandi.\" While Shiratori was still pondering just now, Conan asked Shiro.

\"Well, if this officer is smart enough, I don't think it will take long to close the case.\" Xiaobai replied with a smile.

\"When did you come up with this technique?\" Conan asked as he looked at Shiratori not far away and said about the two suspicious points he had found, and looked at Xiaobai beside him.

\"If you can be careful, maybe you will know that from the moment you enter the door, everything must be well understood.\" Xiaobai did not answer Conan directly, but said this nonsensical answer to Conan.

"The one who came through the door... From a moment...\" Listening to Xiaobai's answer, Conan seemed to think of something, and then looked at the branch manager not far away.

"I think this line must have been my friend's child who came to live here half a year ago, and he was playing near this sports car at the time, so I think it must have been his prank.\" The branch manager explained the silk thread on the pedals of the bicycle to Sato and the others.

"But this thread...\" Shiratori and Takagi looked at the thread they had pulled out, looked at the thread, and then looked at the bookshelf.

"Maybe it can be done...\" While Shiratori was still thinking about something, Takagi walked up to Mrs. Kadai's body, looked at the knife on his back, and then looked at the bookshelf and the thread.

"Perhaps... Maybe that's okay.\" seemed to think of something, Takagi muttered to himself.

\"Hmm?did you find anything?\" Sato asked, looking at Takagi.

"If you look at the direction of the knife, do you feel that something is wrong?" said Takagi, pointing to the knife on Mrs. Kadai's back.

"Something is wrong?\" Sato and Shiratori watched carefully.

\"If that's the case...\" Shiratori glanced at the bookshelf and thread as well after seeing the knife.

"Hmm, what's wrong with you?" Sato didn't know why.

"I think Officer Shiratori found out too.\" Takagi said to Shiratori.

\"Well, if that's the case, it can be done.\" Shiratori nodded.

\"What the hell are you talking about, I can't understand a word.\" Sato glanced at Shiratori and then at Takagi.

"The modus operandi of this case may have been solved.\" Shiratori replied to Sato.

\"What, already unraveled?\" Sato looked surprised.

"Well, the key is in the direction of the knife.\" Shiratori said, pointing to the knife behind Mrs. Gardai.

"Direction?\" Sato looked at the knife on Mrs. Kadai's back.

\"Yes, if it was attacking from behind, the knife would have stabbed vertically, but the knife was horizontal.\" Shiratori crouched down and explained to Sato as he looked in the direction of the knife.

"Yes, maybe this would explain that the killer was attacking from the side, but if that was the case, the victim would definitely have found it and fled. But judging from the sweat stains on the ground, the victim did not resist or run away.\" Takagi said as he crouched down and looked around Mrs. Gardai's body.

"But after looking at the blood stains on the bookshelves and curtains and the threads, maybe everything makes sense...\" Takagi said, standing up and walking towards the bookshelf.

"First of all, fix the knife with adhesive tape or something from the top of the bookshelf.\"Then stick the line to the sports bike, and as soon as the victim starts riding, the line will automatically get involved, and then the whole bookshelf will fall down, and the knife will naturally stab.\"Takagi looked at the bookshelf and looked at the sports car while explaining the technique.

\"Because the bookshelf next to it is full of books, the direction of this bookshelf will not be offset.So, the place where the bookshelf falls will only be facing the victim.\" Shiratori echoed as well.

"This also explains why, when we arrived, the branch manager asked me and Sato to go to check the second floor, and you entered here alone.\" Takagi said as he looked at the branch manager.

\"Oh, so there's such a thing.\ It seems that you've already shown your feet.\" Shiratori smiled and looked at the branch manager.

\"Because you know the equipment of the room and your wife's habits, you can go to the police station if you have everything ready.Just call here before two o'clock, and when the case happens, we can be your alibi.\" Takagi said as he looked at the branch manager.

"It's all just your guess.\When I came in, I just thought the upstairs was a little suspicious, so I asked the two police officers to go upstairs to check on it.And if there were a lot of people coming at that time, there would have been a police officer or someone else who entered the room before me.\And if the knife was fixed on the bookshelf, the knife should be on the bookshelf.\" The branch manager explained to Shiratori and the others.

"Hmm...\" Shiratori and Takagi were stunned.

"What if that's the case.\" At this time, Conan's voice was heard.

I saw Conan holding a knife made of paper, and when he climbed up to the bookshelf, he put the knife in the top crack of the top full of books.

\"I see, the top layer is full of books, and then I put a knife in the crack of the book.This way there is no need for adhesive tape to fix it.Because the heavier the top, the easier it is to fall.\As for the blood on it, I think it must have been from the time it fell.\" Shiratori said as he looked at the branch manager beside him.

\"That being said, my wife should have found the knife on the bookshelf.\" said the branch manager with a smile.

\"So, what if that?\" Conan replied as he took out a few notepads from underneath and placed them on the shelves.

"That way, the knife won't be obvious.\" Takagi said in surprise.

\"That... How did the bookshelf fall?, and your reasoning is good, but everything has to be built on the bookshelf falling.\" exclaimed the branch chief.

\"It seems that you don't die if you don't have the heart of the Yellow River, that line already says it all.\" Shiratori said as he walked towards the sports car.

\"I think you must put the nail on the top of the bookshelf, and then use adhesive tape, and then tie the coil to the nail, so that the bookshelf can be easily torn off when it falls.

\"This... It's just your assumption, and why should I kill my wife?\" the branch chief asked rhetorically.

"I think the answer is in this album.\" Shiratori said as he walked towards the album that the police had just brought in.

\"...\" Seeing Shiratori walking towards the album, the branch manager seemed to get nervous.

\"From the circles on it, and what Mrs. Kayo said to Takagi, I think she must have wanted to take this album to the police station and tell us that these people are the bandits who robbed the bank not long ago.\" Shiratori said as he flipped through the open album to the branch manager.

"I see, if the branch manager is the mastermind, then it will be easy to rob your own bank.\" Sato said with a sudden realization.

\"Yes, so it wasn't because of Mrs. Gardai's strong resistance that she was given up as a hostage, but because she was afraid of being found out about the true face of the bandit, so you released the hostage.\But unexpectedly, Mrs. Kadai still knew the true face of the bandit.\You didn't want us to know the true face of the bandit, so you set up this method to kill her.\" Shiratori said to the branch manager.

"Evidence, what about the evidence, according to what you say, what about the tape and nails that are evidence?"

\"Judging from the fact that there is no evidence at the scene, I think the evidence must still be in you.\" Shiratori said as he looked at the branch manager.

\"Unexpectedly, when I moved back to the bookshelf, the thing that was removed as a precaution became the only clue.\" After listening to Shiratori's answer, the branch manager lowered his head and pondered for a few seconds, and while smiling wryly, he took out the tape and nails from his pocket as evidence.

\"Then, please come with us to the police station.\" Takagi said as he took out his handcuffs and roasted the branch manager.

Under the confession of the branch manager, several gangsters who participated in the bank robbery were caught by the police on the spot, according to the branch manager, he wanted to rob the bank because his wife was too profligate, but the result turned out to be that he killed his wife.

And as for Xiaobai...

\"Aha... It's still comfortable in bed, and I really shouldn't go out today.\"Well, this unscrupulous guy...