"What?" In Tokyo, Hattori and the two immediately widened their eyes after receiving a call from Gao Cheng, "Son?!" Are you sure? ”

"There will be no mistake," Gao Cheng looked at Yamato Dasuke on the side, and continued to contact on the phone, "The specific situation will be discussed later, there is not much time left, Lady Wakamatsu may be killed after Mr. Yuro, now only you can stop it!" ”

"What the hell is going on......"

Before Conan Hattori could figure it out, his face changed and he looked in the direction of the study.

"So," Twilight said as she finally led the door to the study, "I'll have two cops on standby at the door of the room, and tell them if anything." ”

"Okay."

Mrs. Wakamatsu watched Twilight leave tiredly, and when the door closed, the surroundings suddenly became cold, and after a moment of silence, Mrs. Wakamatsu's tired face disappeared, and she laughed uncontrollably.

"Wait!"

Conan Hattori suddenly opened the door at the same time and rushed into the study, looking at Mrs. Wakamatsu with a frozen smile.

Just now, they had asked forensic personnel to check the places where the victim's fingers might touch, and found poison residues on the doorknob outside the victim's room, and the prisoner accidentally spilled on the floor and his own slippers, and were planning to have the police inspect everyone's slippers.

Hattori's eyelids collapsed.

"What the hell is that guy in the city, no matter what you think of this lady, you ......"

"It should be said that it is a cover-up," Gao Cheng's voice continued to ring on the phone, "or there are other crimes, but the murderer is not her." ”

"Huh?"

Hattori turned on the speakerphone and yelled with a sullen face, "Then you tell me why?!" ”

"I've been wondering why someone sent you that letter, and why he went out of his way to remind you of the secret of the tile exchange at the Wakamatsu house in Osaka, and why it happened that there was a murder when you came to the door, or why the prisoner still killed Mr. Yuro even though he knew in advance that a detective was coming to the door......

Gao Cheng rubbed his ears and explained: "There are two possibilities, the sender hopes that you can find the murderer of the president, and the sender hopes that you can prevent Mr. Yuro from being killed, and these are the premise that the sender is not the murderer of Mr. Yuro, that is, as you think, Mrs. Wakamatsu killed someone." ”

Mrs. Wakamatsu, whose smile froze in the study, gradually turned stunned, and the others gathered one after another.

"What's wrong? Isn't it to restore the scene? Director Shiina wondered.

He Ye heard the voice and asked, "Is it a call from the city household?" ”

"Joto?" The secretary and maid looked dazed, "Who is Chenghu?" ”

"It's Joto Takasei, who is on the same level as my father," Ran explained with a smile, "Joto Senpai has gone to Karuizawa to investigate the scene of President Wakamatsu's murder." ”

"Hmph." Mori Kogoro elongated his face in dissatisfaction.

They all ran to Karuizawa and came to meddle in his case......

"It seems right to think of Mrs. Wakamatsu as the murderer of Mr. Ikuro, because she was the one who shielded Mr. Ikuro at the scene of the president's murder, and I am afraid that she hid at the scene with the murder weapon at that time......"

Gao Cheng's voice sounded clearly in the study through the phone, as if bringing everyone back to the scene of the first incident.

"Mrs. Wakamatsu didn't know why, not only did she hide the death message after breaking the maid, but she also took the opportunity to let Mr. Yuro cry while holding the president's corpse, so that there would be no suspicion if there were blood stains on his body, and of course the murder weapon was disposed of separately, and afterwards it was decided to renovate the bathroom and completely eliminate the traces, no one would have thought that the kind of tile ...... that actually used visual deception"

Hattori frowned and said: "You may not be clear if you are not here, we have found clues, the murderer sprinkled poison powder on Mr. Yuro's doorknob, it seems that his slippers are also stained, as long as you check everyone's slippers......"

"Swap it out secretly and you'll be in trouble."

"How is this possible? I can do this kind of thing without being suspicious......"

"Outside the toilet."

Gao Cheng checked in the bathroom of the villa and said, "There are slippers in the toilet of Karuizawa Villa, I think it should be the same in Tokyo, right?" And most importantly, since Mr. Yuro likes to eat cakes with his hands, it is normal to wash his hands beforehand, even if it is only once, which will cause the prisoner's plan to fail......

"Or maybe Mr. Ikuro has never had this habit?"

"This ......"

Hattori's face changed, and he looked at the people of the Wakamatsu family.

"By the way," Kazuha remembered, "At that time, I went to the toilet with Xiaoran, and Mr. Yuro happened to come out of the toilet, and then went to the living room, and asked us, 'I heard Mr. Shiina's voice, did he bring Baumkuchena?' And I said it while wiping my hands! ”

"How, how can this be?" Hattori and Conan looked at each other, sweat oozing from their faces.

"Doesn't that mean it's the cake that is poisoned?"

"But at that time, there were still two Baumkuchen cakes in the tray, both of the same size and shape, how could I make that stupid young master ...... Let Mr. Ikuro get it? Is there really such a method? ”

"Of course there is."

Gao Cheng held his mobile phone and smiled: "Have you forgotten?" The optical illusion that has been used several times, as long as the two vintage cakes are laid out according to the situation at the time, you can know the reason why Mr. Yuro chose the second piece. ”

"Gastro delusion," Zhufu Gaoming, who had been silent next to him, said suddenly, "Is the Joto detective talking about the delusion phenomenon discovered by a psychologist named Gastro more than 100 years ago?" Indeed, because Baumkuchen is a ring, if two equal pieces are placed in parallel, even if they are the same size, there will be a contrast due to the difference in the length of the inner and outer arcs, and the result is that the inner one looks larger......"

"Well, that's pretty much ......."

Gao Cheng looked slightly stunned.

He only reconstructed and analyzed the crime scene through his thinking space, and the facts were the basis for judgment.

"In short, the only people who can use this method are the maid who cuts the cake, the secretary who sets the plate, and the designer Fujina, who was standing next to the tray at the time, and Director Shiina."

Gao Cheng's gaze was solid.

"And only Mrs. Wakamatsu who has never approached will be ruled out by the police, and at the same time, you will be suspected by a high school detective, I think, the real murderer will probably vaguely remind you that the doorknob is poisonous, and guide you to target Mrs., which is why you have to do it today.

"Looking at your panicked look just now, is Lady Wakamatsu alone in the room? If I didn't guess wrong, I would probably have committed suicide soon, and maybe the suicide note was prepared, although I don't know exactly what method the prisoner was going to use, but I'm afraid it was also poisoned by the lady herself. ”

"You're saying the killer this time is the sender?" Hattori looked at Mrs. Wakamatsu, who was already pale in the study, "Why the hell?" ”

"Revenge and annihilation," Gao Cheng said calmly, "Of course, this is just my guess, but Mrs. Wakamatsu is afraid that she doesn't want Mr. Yurou to continue to live, so this can explain the reason why she deliberately stayed away when she divided the cake, and perhaps Mr. Yuro's death was expected by her." ”

"She knows?!"

Hattori's brow twitched.

Come on, how can this guy from Joto know so well? Obviously not at the scene......

Isn't it just hiding somewhere?

Hattori looked left and right suspiciously.

"Weird, isn't it?" Gao Cheng continued, "How can the murderer know about the tile, obviously he has never been to the scene, but he seems to know that Mr. Yuro is the murderer of the president, either the murderer found out the truth himself, or someone revealed it to the murderer." ”

Hattori looked at Mrs. Wakamatsu, whose face was ugly and cold in a cold sweat, and there was no need to verify it.

Who the hell is the murderer?!

Twilight couldn't help but ask, "Brother Chenghu, ...... murderer?"

"There are four suspects, but they are able to arrange the time for guests to visit, and the number of people is just enough to make Baumkuchen eighth," Gao Cheng looked at the time on his watch, "There is only one person." ”

"Secretary-Miss Satake?!"

Everyone at the scene, except for Mrs. Wakamatsu, froze their bodies, and even Satake, the secretary who had always been calm, suddenly dilated his pupils.