The crime scene was a closed laboratory.
Professor Tanaka fell face up in front of the data terminal, his face was blue and purple, with white foam at the corners of his mouth.
Strangely, he was holding a pen tightly in his right hand, and his left hand was open with the palm facing up, on which was drawn the ∞ symbol.
"The preliminary diagnosis is cyanide poisoning!" said the head of the forensic department, "The time of death was between 9 and 11 last night!" There were three suspects at the scene: Shen Yuan, graduate student Kenichi Sato, and professor's assistant Misaki Kobayashi.
The laboratory access system showed that all three people had been to the laboratory last night.
"I left at nine!" Sato said excitedly, his eyes red and swollen. "I had a date with my girlfriend!" Xiaolin adjusted his glasses. "I locked the door at ten, and the professor was still working!" Shen Yuan slowly adjusted his cuffs. "I came to pick up some information at eight and stayed for less than ten minutes!"
"Hey, Brother Shen," Conan raised his head and asked in an innocent tone: "Are you on bad terms with the professor? You don't look sad at all!" Maori Kogoro turned around immediately after hearing this, and his finger almost poked Shen Yuan's nose: "That's right! The deceased is your mentor! You didn't even shed a tear! The murderer is you!" Shen Yuan shrugged helplessly, and the watch on his wrist shone coldly under the light: "I'm an exchange student from the University of Tokyo. I've only seen this 'mentor' four times in the past three months since school started.
There's really nothing to be sad about!" His tone was as calm as if he was discussing the weather. "The first time was when I registered for the semester and decided on my advisor. The second time was when I was giving lab instructions, and he was an hour and a half late. The third time he broke the appointment and used his day off to make up for it. The fourth time was yesterday..."
"That's enough!" Maori interrupted him, "This is your motive for killing! Because the mentor is irresponsible!"
"Brother Mori..." Inspector Megure wiped the sweat off his forehead.
Shen Yuan spread his hands helplessly: "Mr. Mao Li, I am only here at the University of Tokyo for an exchange for one year, and I don't have any courses to complete.
"The teacher is irresponsible, but I wouldn't kill anyone, right?" Maori Kogoro was speechless for a moment, obviously realizing that killing someone just because the teacher missed a few classes was indeed too exaggerated.
Conan's face was filled with black lines.
Mao Lilan quickly bowed and said, "I'm so sorry, my father is so rude!"
Chapter 5: Death of the Professor 2
Everyone continued to conduct a careful investigation in the laboratory.
Conan squatted under the vent, adjusted his glasses with his little hands, and suddenly said in a childish voice: "It's so strange, the filter there seems to have been moved!" Maori Kogoro came over immediately after hearing this, stared at the vent for a few seconds, then slapped his thigh and shouted: "I know! The murderer must have put the poison behind the filter! When Professor Tanaka turns on the fresh air system, the poison will be released automatically!" He turned suddenly and pointed at Kobayashi Misaki, "It must be you! As an assistant, you are most familiar with Professor Tanaka's habits!" Kobayashi's face turned pale in an instant. She adjusted the black-framed glasses on her nose, her fingers trembling slightly: "Nonsense! Why should I kill the professor? I have been doing research with him for three years!..." Her voice was a little sharp because of excitement, and her yellow shawl hair kept shaking with her violent shaking movements.
While the two were arguing, Conan quietly went around to the other side of the corpse.
He squatted down, pretending to tie his shoelaces, but in fact he was carefully observing the white lab coat that Professor Tanaka was wearing.
When he opened the inside pocket, his fingertips suddenly touched a strange texture. A red hair about twenty centimeters long was stuck in the seam of the pocket edge.
The hair stood out against the pure white lab coat, its bright burgundy color gleaming under the laboratory's fluorescent lights.
Conan carefully put it in the evidence bag he carried with him, and at the same time glanced at Kobayashi who was arguing with Mouri Kogoro - her yellow shoulder-length hair was obviously inconsistent with the evidence.
"And the professor was fine when I left last night!" Xiao Lin waved his arms excitedly, the silver bracelet on his wrist jingling. "The evidence outside the school gate proves that I left school a little after ten o'clock!"
"As long as you make arrangements in advance, it will be an automatic killing mechanism, and you don't need to be present at all!" Maori Kogoro insisted, "As an assistant, you have plenty of opportunities!" Conan noticed that when Kobayashi was defending fiercely, her nails were neatly trimmed and painted with light pink nail polish, and the owner of the red hair found in her pocket was probably someone who liked to wear dark nail polish - a dark red trace could be vaguely seen at the end of the hair, as if it had been dyed with nail polish.
The light from the laboratory shone on this unusually conspicuous red hair, and Conan's glasses reflected a sharp light. His eyes swept over the hair of everyone present - Shen Yuan had short black hair, and Sato had short dark brown hair, both of which were completely different from this bright red hair.
"Brother Shen," Conan held up the hair in the evidence bag and asked in an innocent tone, "Who else can come into your laboratory? This hair is obviously not from you three, or can you wear your lab coats outside?" Shen Yuan squatted down, his eyes level with Conan's.
He looked at the long hair carefully and shook his head. "As a rule, we can't bring outsiders into the lab, and we can't wear lab coats outside!" He paused. "Judging from the length, it must belong to a woman. I don't have a girlfriend. Perhaps the professor or Sato brought someone here?" Conan blinked and continued to ask, "Then, Brother Shen, how is the lab cleaning arranged? Do lab coats need to be washed every day? When was this hair first left there?"
"I think it was after 2:00 PM yesterday!" Shen Yuan answered thoughtfully, "The lab is usually cleaned from 12:00 PM to 2:00 PM by a dedicated person.
The lab coats were also replaced directly with new ones!"
"Thank you, Brother Shen!" Conan said sweetly, and suddenly jumped to Sato, "Brother Sato, I heard that you have a girlfriend? Can you show me her photo?" Sato was stunned for a moment, and took out his mobile phone awkwardly: "This... okay..." He took out a photo. The girl in the photo had bright red hair and a bright smile.
A white light suddenly flashed across Conan's glasses, and it was obvious that he had made a major discovery.
Shen Yuan watched this scene from the side and couldn't help but sigh in his heart: Conan is indeed the son of destiny. He can always make people let down their guard with his innocent attitude. The suspects will answer every question and then successfully send themselves to jail.
The reason why Shen Yuan was sure that Sato was the murderer was very simple, because Maori Kogoro first suspected him and then suspected Kobayashi. This was Maori Kogoro's classic mistake of choosing two out of three.
Inspector Megure was checking Kobayashi's workbench at the time and suddenly shouted, "What is this?" He found a small bottle from Kobayashi's drawer with the label "Laboratory Cleaner".
"This, this is not mine!" Xiaolin took two steps back in panic.
Maori Kogoro shook the bottle triumphantly: "The evidence is conclusive! This is the container of poison!"
"Wait," Shen Yuan suddenly said, "Inspector Megure, can you let me see that bottle?" Taking the bottle, Shen Yuan carefully checked the label and the bottle mouth: "This label is pasted neatly, but..." He pointed to the bottom of the bottle, "Kobayashi, as a laboratory assistant, will affix date labels on all items according to regulations, but this bottle doesn't have it!" Upon hearing this, Conan immediately ran to Kobayashi's locker, opened it and took a look - each neatly arranged reagent bottle inside had a small date label on the bottom.
"So this bottle was deliberately put into Kobayashi's drawer?" Inspector Megure suddenly realized.
At this moment, the forensic personnel hurried over: "Report! Toxic residues were found inside the ventilation system, but the installation method is very special and requires professional knowledge!" Everyone's eyes turned to Sato - he was the only graduate student in the laboratory with a mechanical engineering background.
Sato's face changed drastically: "No, it's not me! I was with my girlfriend last night!" Conan took the opportunity to sneak up to Shen Yuan and tugged at his clothes: "Brother Shen, do you know what the conflict is between Brother Sato and Professor Tanaka?" He thought for a moment and then whispered: "If you want to talk about a conflict... I heard that the professor has been blocking Sato's thesis.
He's already delayed graduation for a year, and hasn't even earned half of his credits yet!" Shen Yuan's voice was soft, but loud enough for Conan beside him to hear clearly. "Everyone in the lab says he might not be able to graduate this year!"
"Sato-kun!" Shen Yuan suddenly stood up straight, his voice returning to normal volume, "Is your graduation thesis stuck on the chapter on quantum tunneling effect?" Sato trembled violently as if struck by lightning, and his pupils behind his glasses suddenly contracted: "What...what's wrong? Why are you asking this?" His fingers twisted together unconsciously, and his knuckles turned white due to the force.
Shen Yuan didn't answer, but just winked at Conan, took out a black pen from his backpack, and smoothly drew an "∞" symbol on the note paper.
"Look," he pointed to the symbol he had just drawn, "if you draw with the tip of the pen facing outward, it will leave a clear starting point!" Then he pointed to the symbol on the palm of the professor's left hand, "But this one is drawn upside down. Sato's paper number is '87'" Conan's eyes lit up instantly, and his gaze behind the lenses became unusually sharp: "I understand! The professor originally wanted to write '8', but the murderer changed it to '∞'!" His voice trembled slightly with excitement.
Shen Yuan reached out and ruffled Conan's hair, a gentle smile on his face: "Conan is so smart, the smartest kid I've ever met!" Conan immediately spoke in a childish voice as if conditioned reflex, with an exaggerated innocent expression on his face: "Ahaha, I learned this all from Uncle Maori!"
Chapter 6: Death of the Professor 3
A sharp gleam flashed in Conan's eyes.
He quietly retreated to the corner of the laboratory, took out the bow voice changer from his pocket, and skillfully adjusted it to the voice pattern of Kogoro Mouri.
At the same time, his anesthesia watch was aimed at Kogoro Mori who was talking incessantly.
With a light "whoosh" sound, the anesthetic needle accurately hit Kogoro Mouri's neck.
The famous detective suddenly yawned, staggered a few steps, and then sat down heavily on the swivel chair next to him with his head drooped.
"It appears! The sleeping Kogoro!" Inspector Megure shouted excitedly, and the entire laboratory suddenly became quiet.
Shen Yuan watched the scene with great interest, watching the "famous detective" solve the case up close.
A low and majestic voice came from Maori Kogoro's bow tie: "No need to struggle anymore, Mr. Sato.
The murderer is you! "Sato's body trembled violently: "Nonsense! What evidence do you have——"
"The evidence is right here!" Following this voice, Conan pretended to have just popped his head out from behind the lab table, holding a transparent evidence bag in his hand, "I, Uncle Maori just handed this to me..." In the evidence bag, the bright burgundy hair was particularly eye-catching under the light.
"This was found in the pocket of Professor Tanaka's lab coat!" The sleeping Kogoro continued, "It means he has a special relationship with a red-haired woman, doesn't it? And Sato's paper number is '87', right?" Sato's girlfriend - the red-haired woman.
Then Conan came out again and quickly retrieved the folder containing Paper No. 87.
Among the many data files, a hidden photo album stands out.
When he clicked it, the screen showed an intimate photo of Sato's girlfriend and Professor Tanaka - the professor's hand was even restlessly placed on her waist.
"Did you kill people in anger after discovering these photos?" Kogoro Mouri's voice continued.
Sato's face turned from pale to blue, and he suddenly rushed towards the computer: "Shut up! What do you know!" But he was immediately stopped by Officer Takagi.
"These photos..." His voice was terribly hoarse, "that beast showed them to me on his own initiative..." The entire laboratory was silent, with only Sato's heavy breathing echoing.
"He said... he told my girlfriend that as long as she behaved... he would let me graduate this year... My girlfriend didn't tell me about this," Sato's fists were clenched white, "but last week... he actually smiled and showed me these photos... and said that when he gets tired of playing... he will consider my thesis..." Sato suddenly knelt on the ground, tears falling on the floor, "That beast... he took advantage of my thesis being rejected... and forced my girlfriend... and threatened that if I called the police, I would never graduate..." He raised his head, the anger in his eyes had turned into despair: "I came to argue with him yesterday... and he actually smiled and said... that my girlfriend is very... very..." Sato couldn't go on, and curled up into a ball.
"So you modified the ventilation system!" asked Inspector Megure, "Use your mechanical knowledge to release the poison at a specific time!" Sato nodded weakly: "I calculated the time... when he was alone in the laboratory..." He smiled bitterly.
Inspector Megure walked up silently and handcuffed him.
Conan stood in the shadows, his eyes behind the lenses flashing with complex light.
Shen Yuan had walked up to him at some point and sighed softly, "Isn't it tragic? Power, desire, revenge!"
"Brother Shen..." Conan raised his head, this time without pretending to be a child, "Do you think this is right?"
"There are very few absolute right and wrong in this world, kid!" He said softly, with a barely perceptible hint of amusement in his voice, "There's only cause and effect!" Shen Yuan suddenly leaned over, closing the distance between him and Conan, "But compared to this, I'm more curious..." His eyes swept over the device on Conan's wrist that looked like a children's watch but actually held a hidden secret.
"Where did you run to just now? Why did you show up only after the case was solved?" Conan's body obviously stiffened for a moment, but it disappeared in a flash.
He immediately regained his innocent look, scratching the back of his head with his little hand and grinning: "Ahahaha... I just had to pee urgently, so I went to the toilet!"
"Is that so!" Shen Yuan didn't want to point out anything, after all, he just wanted to be an outsider, "Remember to tell the adults next time. It's such a dangerous crime scene, and the sudden disappearance of a child will make the adults anxious!" Conan's glasses reflected white light, blocking his eyes at the moment.
He was about to say something when Mao Lilan's voice came from the door: "Conan! You're running around again! I've been looking for you for a long time!"
"Sister Xiaolan!" Conan immediately switched back to child mode and ran towards Mao Li Ran, "I was with Brother Shen just now, looking for evidence!" When they walked out of the laboratory building, it was completely dark.
The street lights on campus light up one after another, illuminating the way for students returning home late.
Shen Yuan pulled out his phone and saw several unread messages: [Tokyo University Physics Department Group]: "Meet-up with new advisors tomorrow afternoon at 3:00 PM"
"There's a new ramen restaurant in the cafeteria. Does anyone want to go try it together?"... He put away his phone with a smile, thinking that he should take Lightning to the pet hospital for a routine check-up tomorrow.
In the distance, Conan's figure, being led away by Mao Lilan, gradually disappeared into the night, with only his glasses occasionally reflecting the light of the street lamp.
Chapter 7 High-Paying Part-Time Job
Shen Yuan returned to the apartment and suddenly stopped when he walked out of the elevator.
The door of his house was open, and warm yellow light poured out from inside.
What surprised him even more was that his silver-haired neighbor, Gin, who always dressed in black, was squatting at the end of the corridor, holding a medium-rare steak in his slender fingers and carefully handing it to Lightning.
The cheetah lowered its head gracefully and took the piece of meat from Gin's hand. Its silver-gray fur shone with a soft luster under the light.
Gin's movements were surprisingly gentle, even using his other hand to catch the gravy from dripping onto the carpet.
The man and the leopard noticed the sound of the elevator at the same time.
Gin stood up suddenly, and his black windbreaker drew a sharp arc in the air.
He quickly regained his stern expression, but Shen Yuan keenly noticed that the tips of his ears were slightly red.
"You're back too late!" Gin said coldly, with his usual oppressive tone in his voice, "Your... leopard is hungry and has been scratching my door!" Lightning licked his lips in satisfaction, not looking hungry at all.
It rubbed its head affectionately against Gin's trouser leg, leaving a few conspicuous silver hairs on the pure black fabric.
Shen Yuan suppressed his smile and walked over slowly: "Thank you, sir, for taking care of Lightning!" He nodded slightly, his voice gentle and polite, "My name is Shen Yuan, and I'm from the Flower Growing Family.
If it's convenient next time, please allow me to invite you to dinner at my home as a return gift!" Gin's eyes flickered.
He looked down at Shen Yuan, an elusive emotion flashing in his sharp green eyes.
After a moment's silence, he said nothing, but turned and walked towards his home.
The black leather shoes made almost no sound as they stepped on the carpet.
At the last second before the door closed, Shen Yuan seemed to hear an almost inaudible "hmm".
Lightning looked at the closed door opposite with lingering interest, then turned to look at his owner, his ice-blue eyes full of anticipation.
"You..." Shen Yuan rubbed the cheetah's head: "Do you know that your master's wallet is in danger and you are afraid that your living standards will decline, so you start looking for food tickets for yourself?" His eyes fell on the floor at the door - there was an exquisite porcelain plate with some gravy left in it.
The edge of the plate is printed with intricate patterns, and it's obvious that it's expensive.
Shen Yuan closed the apartment door and carefully placed Gin's porcelain plate into the sink.
Lightning licked his lips contentedly and paced behind him, his silver-gray tail wagging gently.
"It seems you had a good meal tonight!" Shen Yuan rubbed Cheetah's head, "I'm still hungry!" He took out a blue and white porcelain bowl from the cupboard, scooped two cups of fragrant rice and washed it clean.
After the rice cooker started working with a "beep" sound, Shen Yuan took out a piece of pork belly, some bok choy and two eggs from the refrigerator.
The kitchen knife made rhythmic sounds on the chopping board, and the pork belly was cut into even sizes.
Shen Yuan's movements were smooth and fluid. He heated the pan and added cold oil. The moment the meat slices were put into the pan, the aroma immediately filled the entire kitchen.
"Sizzle--" After the meat pieces were stir-fried until oil came out, Shen Yuan added crushed garlic and ginger slices.
Dark soy sauce adds color, cooking wine removes the fishy smell, and finally pour in a small bowl of water and simmer slowly.
While the braised pork was drying up, he quickly stir-fried some bok choy with garlic and steamed a bowl of tender and smooth egg custard.
Twenty minutes later, Shen Yuan came to the living room with food.
The braised pork is shiny and attractive, the vegetables are green and crisp, and the golden egg custard is dotted with a few green chopped green onions.
"Dinner is ready!" Shen Yuan said to the air.
Lightning raised his head and sniffed, then lay back down with a lack of interest - obviously, he preferred high-end steak to Chinese home-cooked meals. He was truly a leopard who lived a more luxurious life than his owner.
Shen Yuan opened his laptop while eating hot rice.
On the screen are various part-time job information pages.
Shen Yuan's chopsticks stopped in mid-air, and he recalled that when he checked his bank transfer records, the bank app still showed the record three months ago.
The living expenses that my mother mentioned will probably never arrive as scheduled in this chaotic time world of Conan.
"Tsk!" Shen Yuan put down his chopsticks and rubbed his temples.
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