Conan kissed me again and again, and Huiyuan was stunned

At this moment.

"Most gas stoves on the market are designed to be easy for right-handed people to turn the buttons, so forcing the left hand to do so would be very troublesome."

Kudo Shinichi turned his back to the black office chair, holding the bow-tie voice changer with both hands and placed it on his lips, and reasoned in the voice of Maori Kogoro:

“If you apply poison to the left side of the button on a gas stove, then in order to turn it off, the thumb of the right hand must touch the left side of the button.

The evidence is that the door handle inside the chairman's office showed a toxic reaction, but the door handle outside did not, which shows that...

Mitsuru Hieda hurriedly opened the door and ran out without even closing it, touching the poison without any precautions. He returned to the office with confidence, closed the door and locked it.

According to Inspector Megure's previous guess, the criminal called Hieda and lured him out of the office, but Hieda, who was a cautious person, would probably not forget to close the door when he went out to answer the phone.

If Fei Tian was contaminated with poison outside and came back, the door handle would definitely show signs of a toxic reaction, but this did not happen.

In summary.

In an emergency, Fei Tian left the office. "

"I understand."

Officer Megure nodded slightly, took two steps forward, looked at Maori Kogoro with a serious expression, and said seriously:

"Detective Mori, who is the criminal who used a trick to poison Hieda Mitsuru?"

"That was the only person who was close to the gas stove after the incident..."

Kudo Shinichi thought for a moment, then revealed it solemnly:

"You are the culprit!!

Fujii Takako!"

at the same time.

Dongfang Haoyue controlled Maori Kogoro to open his eyes, raise his head, stare sharply at Fujii Takako, and point his right hand at her.

Naoyoshi Minamisawa and Hiroshi Iino stood inside the door, their pupils suddenly shrank, and they looked at Fujii in the middle in front of them in disbelief.

Takako Fujii put her hands in her pockets, and a drop of sweat unknowingly slid down her delicate cheek.

Dongfang Haoyue casually put down his right hand, lowered his head, closed his eyes, and his face was completely hidden in the shadows.

Kudo Shinichi revealed calmly at the right time:

“Before leaving get off work, you put a kettle with a siren on the gas stove and even smeared poison on the gas button.

Just as Mitsuru Hieda was counting the money, the water boiled and the sirens sounded.

What happened next is just as you would expect...

The sound of the sirens frightened Fei Tian, ​​and he hurried out of the room, touched the poison, and when he returned to the room to count the money, he licked his right thumb and died from the poison.

Kudo Shinichi paused for a second and speculated calmly:

“You originally wanted to wait until tomorrow to go to work to wipe the poison, but the body was discovered earlier than you expected, and the police quickly rushed to the scene.

You were afraid that the police would find out that the button of the gas stove was attached with poison, so you took the opportunity to enter the tea room, wiped the poison with a handkerchief and pretended to make tea. Am I right, Ms. Fujii?"

"Hmm, what are you talking about?"

Takako Fujii always kept her left hand in her pocket.

She took out the cigarette box slowly, opened the lid with one finger, flicked the cigarette up and down, put it between her red lips, put it back in the box, lit the cigarette with the lighter, put it back, and said as if it was a matter of course:

"My handkerchief didn't show any toxicity, did it?

Besides, the switch of the gas stove did not react to any poison. How do you explain this?"

"It makes sense that the handkerchief didn't have any toxic reaction."

Kudo Shinichi smiled slightly and revealed calmly:

"Only if there is only a handkerchief."

"what?"

Inspector Megure and Fujii Takako made surprised noises.

suddenly!

"dad!!"

Xiaolan rushed into the door as fast as the wind, and anxiously stopped to the right of Inspector Megure, her eyes locked on Maori Kogoro, and she raised the iodine in her right hand and reported excitedly:

"I brought iodine!"

“Iodine?”

Inspector Megure was slightly stunned and looked at the iodine in surprise until the next second.

"Come on, Officer Megure."

Kudo Shinichi chuckled and said with a determined look:

"Please put iodine on the water stain on her handkerchief. Just one drop of iodine... will make everything clear."

Half a minute later.

"If you put iodine on the handkerchief...it should just turn brown..."

Inspector Megure held iodine in his right hand.

He half-knelt on the right side of Kogoro Mouri, facing the desk, looked at the white handkerchief on the table with some confusion, and carefully dropped a drop of iodine, causing the handkerchief to turn light brown.

After a short time.

"This...this is..."

Inspector Megure observed the handkerchief closely and suddenly found that the brown stain on the handkerchief was gradually disappearing. His pupils dilated and he exclaimed in disbelief:

"The color disappeared!?"

"Yes, her handkerchief was stained neither with water nor sweat, but with..."

Kudo Shinichi dragged out the words with great charm, revealing them sternly:

“Sodium thiosulfate!!”

"Sodium thiosulfate?"

Inspector Megure sat up and looked at Kogoro Mouri in surprise.

Dongfang Haoyue complained in confusion in the spiritual world:

"Nowadays, solving a case requires not only seeing through the mechanism used by the criminal, but also certain knowledge of chemistry. The screenwriter of Detective Conan is really good at designing the plot!"

The thought just fell.

Kudo Shinichi explained calmly:

“That’s a bleaching agent that doctors often use to remove the color from disinfectants.

At the same time, it is also the antidote that causes potassium cyanide to lose its toxicity in this murder case. "

Kudo Shinichi paused for a second, then revealed confidently:

“It’s inside the wooden cabinet in the bathroom!

Sodium thiosulfate is mixed into the bleach to react at room temperature.

"Go investigate!"

Inspector Megure suddenly turned around and looked at the tall police officer standing outside the door, his face solemn.

The police officer quickly turned and left, responding crisply:

"Yes!!"

at the same time.

Kudo Shinichi calmly concluded:

"After the incident, Ms. Fujii may have gone to the bathroom as soon as she arrived here, soaked a handkerchief in bleach, and found an opportunity to wipe the poison from the gas stove button."

"I see."

Inspector Megure looked at Maori Kogoro steadily, and analyzed with sudden enlightenment:

"The criminal not only wiped the poison, but also used drugs to eliminate the properties of the poison so that it would not show a toxic reaction and avoid the inspection of forensic personnel."

"Yes."

Kudo Shinichi calmly narrated:

“Sodium thiosulfate is colorless and odorless, and staining a handkerchief is like staining it with water.

But... bleach can't be purchased at a regular drugstore, so it shouldn't be in a bathroom cabinet."

Kudo Shinichi changed the subject and said solemnly:

"Ms. Fujii, please explain clearly!

Why is your handkerchief stained with that drug? ! "

"I, I washed the handkerchief."

Fujii Takako held a cigarette between the index and middle fingers of her right hand and let it hang down on the right side of her body, trying hard to maintain a calm expression.

"Wash the handkerchief?"

Kudo Shinichi asked calmly:

"In the bathroom just now?"