Tuesday, August 19, before 7:30 p.m., Hita Financial Company.

When the forensic officer checked the office computer, he found that one of the computers was not turned off, so he asked Naozen Minamizawa, Takako Fujii, and Hiroshi Iino, "Can we just turn it off?"

Hiroshi Iino said, "Ah, no, I'll turn it off myself." ”

Takako Fujii took a puff of her cigarette, and then said, "Don't touch a few of you, if you don't know which key to press, someone will be finished if that information comes out last time." ”

Nanzawa Naozen asked, "Wouldn't it be the information you used to steal public funds with a fake account?"

"Thief?" asked Maori, "Could it be that you killed him because your president found out about this?"

"I didn't, I didn't. Hiroshi Iino hurriedly said, and then said, "If, if you say that you want to kill the president, Mr. Nanzawa also has a share." ”

Naozen Nanzawa shouted, "What do you say, I don't have the motive to kill the president at all. ”

"Didn't you have a customer who borrowed a large amount of money and ran away? When the president in turn asked you for the money, you cried and begged the president to eat the money, but the president didn't answer you. Takako Fujii said, "Now that the president is dead, you should be relieved." ”

Naozen Minamizawa said: "What about you? You yourself don't often carry the president behind your back, saying that it's best for that kind of villain to die early, you can't deny it." ”

"That's right. "But I didn't steal public money or owe money. ”

At this time, Yamazaki came over, said hello to Mori, and asked Ran about the situation.

Approximately thirty minutes later, forensic officers reported: "No toxic reaction has been found in the police department, offices, kitchens, restrooms, etc. No toxic reaction was found on the belongings of Mr. Nanzawa, Miss Takako, and Mr. Iino. However, we found a bottle of detergent in the bathroom that neutralizes cyanide and detergent residue on the kitchen stove. ”

"What!" Dusk Police and Mori were taken aback, and Twilight Police asked, "You mean someone wiped the cyanide off?"

"It's not clear. Forensic officer said.

Maori asked, "So where are they?"

"There was detergent residue on almost the entire stove. ”

"That's when I wiped the stove in the afternoon. Takako Fujii spat out a smoke ring, "Maybe I didn't wipe it clean." ”

"What about the rest of the world?" asked the Dusk Police Department.

"There are also residues of detergent on the kitchen kettle, on the doorknob of the bathroom, on the sink and faucet, on the toilet tank and mat, and on the handkerchief of Miss Takako," the convener said. ”

"Ah, I see. "Here's the thing, Dusk Police. ”

"You say. The Dusk Police Department said.

"The murderer of Mr. Hida was Miss Takako, who boiled a pot of water on the stove before leaving work, and when Mr. Hida was counting the money in the president's office, he heard the sound of the kettle beeping because the water was boiling, so he hurried to turn off the fire. "At this time, the poison got on Mr. Hita's hands. ”

The Dusk Police Department asked, "You mean the poison was placed on the gas switch?"

Maori said, "Yes, after Miss Takako came over, she went to the bathroom and poured detergent on her handkerchief, and then came to the kitchen to wipe off the poison on the gas switch." ”

"That's why there's detergent on the handkerchief. The Twilight Police Department said, and then asked, "Miss Xiaozi, what do you explain about this?"

"The detergent on my handkerchief is supposed to be left over when I wipe my hands. Takako Fujii asked, "And, officer, do you think I have that much time to wipe these things?"

"This," the Twilight Police Department asked, "Maori." ”

"You wiped the kitchen stove and kettle before you got off work, you only wiped the gas switch when you were brought in, and you only wiped the bathroom after you. "That's why you go to the bathroom again." ”

"Hmph!" Takako Fujii snorted coldly, pointing at Naozen Minamizawa and Hiroshi Iino, and asked the forensic staff, "Hey, are there fingerprints of the two of them in the bathroom?"

"Yes. Forensic officer said.

"Do you understand this? Confused detective. Takako Fujii said.

Maori said, "The bathroom was wiped the first time you went. ”

"But, Brother Maori, what's the point of doing this?"

"This ......" Maori couldn't answer for a while, and then felt a numbness in his neck, and he lost consciousness.

Conan, who had prepared the chair earlier, let Maori sit down on the chair, and then said in Maori's voice: "These places are all wiped by Miss Xiaozi before getting off work, and the purpose of wiping the stove and kettle with detergent is to cover for the later wiping of the gas switch, and the only place where Miss Xiaozi came in was the poisoned gas switch she left." And wiping the toilet with detergent is just in case, so that if the poison on Mr. Hida's hands comes into contact with the objects in the toilet, it can also be neutralized so that other people are not poisoned, which is the kind side of Miss Takako. ”

"I see. The Twilight Police Department asked, "Miss Xiaozi, what else do you have to say?"

"If cleaning in the company is also a crime, then you can arrest me and go back. Miss Xiaozi said.

"Brother Maori?" asked the Twilight Police Department.

Conan said in a Maori voice: "In the secret room of the president's office, there are poisons on the fingerprints of the thumb of his right hand left on the handle, the door lock, and several banknotes in the president's office, which means that Mr. Hida once went out of the president's office, came back and locked the door after touching the poison, and then died of poisoning because of his bad habit of licking the thumb of his right hand while counting money. ”

"There are no other items in the president's office that are poisonous, so Mr. Hida didn't take something from the outside through the window and go back to the president's office, and then go to the president's office to close the door after opening it and coming into contact with the poison. ”

The Twilight Police Department asked, "What if Mr. Hida took the things back to the president's office and returned them through the window?"

Conan said in a Maori voice: "The windows in all parts of this room are closed from the inside of the room, and no poisonous substances have been found on them, which means that Mr. Hita did not close the windows after coming into contact with the poison outside, and if he came into contact with the poisonous substances and returned the poisonous substances, then when he closed the windows, he would leave fingerprints with poison on the windows." ”

The Twilight Police Department said, "I see. ”

Conan said in a Maori voice, "So, this poison is in this room." The door of this room is equipped with a video camera, and the video recorded by it shows that no one entered through the gate until Mr. Hida died of poisoning after Takako, Mr. Nanzawa, and Mr. Iino left. So the poison in this room can only be left by one or more of the three of you, Miss Takako, Mr. Nanzawa, and Mr. Iino, and the three of you are the suspects who killed Mr. Hita, the only suspects in this secret room killing incident. ”

"We once called Mr. Hita, who was counting money in the president's office, that is, he was not poisoned at that time, and then he came out of the president's office for something, and in this room he came into contact with poison with his right thumb. ”

"Mr. Nanzawa left a mobile phone, and if he called, Mr. Hita would come to pick it up, but no toxins were found on Mr. Nanzawa's mobile phone, and there were no traces of wiping, so the murderer was not Mr. Nanzawa. Mr. Iino didn't leave anything behind, but he probably knew that Mr. Hita would use his computer, but Mr. Iino didn't find any toxins on his computer, and there were no traces of rubbing, so the murderer wasn't Mr. Iino either. ”

"After the three suspects have removed two suspects, then the rest must be the prisoners. ”

"Miss Koko, you boiled a pot of water on the stove before you got off work, and you put poison on the left side of the gas switch, so when Mr. Hida heard the sound of water and turned off the fire, his right thumb came into contact with the poison. Miss Takako, you're the only one here who has ever been in the kitchen, near that gas switch, and only you have detergent residue on your handkerchief. I think you had planned to wipe the poison off tomorrow when you went to work, but the body was found sooner than you expected, and although the police have not yet found the poison left on the gas switch, it is a matter of time, so you go to the bathroom first and pour the detergent on the handkerchief, and then go to the kitchen to wipe off the poison on the gas switch with a handkerchief. An in-depth examination of the handkerchief and gas switch will reveal traces of the presence of cyanide. ””

"And, Miss Xiaozi, I see that when you take out the cigarette case, when you use the lighter, when you take the bag and take something, you use your right hand, you really use your left hand only once, you keep your left hand in your pocket, I think it's because you are afraid that your left hand may be stained with poison and will accidentally touch other things, your addiction to smoking seems to be very big, and when you smoke, your fingers often touch your lips, you are afraid that the poison will touch your lips, so you will use your left hand to rotate the gas switch, and keep it in your pocket。 ”

The Twilight Police Department said, "Miss Xiaozi, please take out your left hand and let us check it." ”

"No problem. Takako Fujii said.

Moments later, forensic personnel reported that Takako Fujii's left hand was not poisonous, but there was detergent residue.

Conan said in a Maori voice, "It looks like you've washed it off the second time you went to the bathroom." ”

Takako Fujii said, "I'm still saying that, if you think it's also a crime to clean up with detergent, then arrest me." ”

"Alright then," said the Twilight Police Department, "Miss Takako Fujii, please come with me to the Metropolitan Police Department." ”

Takako Fujii smiled: "It's no problem at all, anyway, the boss is dead, and I'm unemployed, so the Metropolitan Police Department should take care of the food." ”

Soon after, the Twilight Police Department left the guards behind and led the team away, Yamazaki returned to Mede's to continue working, and Ran and Conan waited for Mori to wake up and went to dinner. ……

Night, Miyamoto family.

Yamazaki told Miko Miyamoto about the secret room murder incident of Mitsuhiro Hita, "I think this incident should have been done by Miss Takako Fujii, but I didn't feel the murderous aura after the murder in her, I think her motive should be revenge, big revenge, so big as revenge for life, so after revenge, let go and get free." ”

"So you're not sure she's the murderer, and you want to ask my opinion. Miyamoto Miko laughed.

Yamazaki said, "Yes, Mom. ”

Miyamoto Miko thought for a while and said: "There is a problem with the reasoning, that is, it is based on the assumption that Mr. Hida only uses his right hand, whether it is to hold things, open the window, or close the window, the right hand is used, but the habit of using the right hand does not mean that he will definitely use the right hand. ”

"Well," Yamazaki said after a moment's thought, "yes, so we can't rule out the possibility that Mr. Hita could expose his right thumb to the poison outside through the window and then use his left hand to close the window." ”

Miyamoto Miko said, "And that reasoning also ignored an item. As a reminder, there's more to wiping than just handkerchiefs. ”

"Well," Yamazaki thought for a moment and smiled wryly, "I can't think of it." ”

"Heh, heh. Midaiko laughed.

"Oh, you got that in mind?" asked Miko Miyamoto.

"Well, it has nothing to do with me. Mei Daizi smiled, "I don't want to." ”

"Just guess the riddle. Miyamoto Miko smiled, "Again, this kind of wiping item is basically used by everyone every day." ”

"It can't be a tissue, right?" asked Midaiko.

"It should be toilet paper. "Takako Fujii probably uses hydrolyzable toilet paper, so she prepared toilet paper with detergent before entering the door, wiped the gas switch, and went to the bathroom to dispose of it. That's why Takako Fujii was so calm, because even a thorough examination of the handkerchief could not find any traces of the presence of cyanide. By the way, in this case, she also used detergent to wipe things with the intention of pouring a large amount of detergent into the toilet and sewer pipes, so that no traces of cyanide could be detected. ”

"Yes, but it's just speculation, speculation without any physical basis, although it may be the same as it is. Miyamoto Miko said, then asked, "Got it?"

"Understood. "Because the toilet paper that used to be rubbed with cyanide is completely gone." ”

"Alright, it's almost time, I'm going back. Miyamoto Miko said, "Midaiko, it's not too late. ”

"Got it, Mom. Mei Daiko smiled. ……