Chapter 84: The True Effect of the Potion

Chapter 84: The True Effect of the Potion

“What is your relationship with He Yu?”

Xiao Yu looked up, fixing his gaze on the other person.

“He Yu?”

Ku Shi blinked once and smiled, “She’s my student. We have a great rapport. Not long ago, her input on my psychology paper was immensely helpful.”

He behaved completely normally, showing no signs of suspicion.

But… why blink?

Xiao Yu furrowed his brow.

Isn’t it normal for people to blink?

When a normal person is questioned by the police about someone they know, what’s the usual reaction?

Don’t you wonder if that person might be in trouble?

When doubts cloud one’s mind, the eyes tend to shift unconsciously.

Typically, people blink when looking straight ahead or up and down; blinking while looking sideways is rare.

But… his gaze remained squarely fixed!

Staring and blinking—isn’t that normal?

It is, but the problem lies in your display of normalcy.

Shouldn’t your mind have raced, wondering if He Yu was in danger?

Shouldn’t your eyes have shifted?

So why blink while maintaining direct eye contact?

Or did you already suspect that the police would show up and grill you about He Yu?

No hesitation… You answered without a second thought?

Xiao Yu squinted and asked again, “Is it just a simple teacher-student relationship?”

Noticing Xiao Yu’s habitual squinting, Zhuang Yi blinked once more, his eyes briefly shifting, and replied, “Yes.”

What was he thinking… Xiao Yu’s mind raced as he continued, “You were here on January 14, weren’t you?”

“Here?”

Zhuang Yi nodded again, “Yes, I was here with He Yu, working on that paper. We spent several hours on it.”

Lying… Xiao Yu smiled.

How could he be so sure?

Because of the scent!

In He Yu’s room, Xiao Yu detected two distinct odors.

Both a faint and a strong aroma, tainted with the unmistakable traces of intimate encounters!

Did the research paper lead to some bed play?

That isn’t usable evidence—and Xiao Yu couldn’t confront him based on that alone.

Knowing you’re lying is enough!

“Let’s go.”

Xiao Yu stared at Zhuang Yi and said, “Come with us to help with the investigation.”

“Uh…”

For the first time, Ku Shi’s expression lost its calm—not with panic, but a furrowed brow.

“Is it him?”

After subordinates led Ku Shi away, Wang Dong turned to Xiao Yu.

“He’s a suspect, but nothing’s certain.”

Xiao Yu shook his head, “Investigate it.”

The very fact that he lied warrants a thorough inquiry!

Soon, all records on Ku Shi were laid out before Xiao Yu.

“A psychology expert? And a hypnosis expert too?”

Studying the profile on his laptop, Xiao Yu pondered and shook his head.

No way—if he could hypnotize He Yu to that degree, he must be a master from the get-go.

Xiao Yu and the hypnosis expert from National Security were in full agreement.

Could it really be him?

Then how did he predict the police’s arrival—and know they’d interrogate him?

Xiao Yu couldn’t make sense of it.

National Security launched an investigation into Ku Shi.

Their findings suggested he wasn’t very suspicious.

After all, Ku Shi usually stayed at school during holidays or summer breaks when he returned to his hometown.

An orphan raised in a welfare institute—his so-called hometown was the welfare center where he grew up.

He had been married once, but personality clashes led to divorce.

After that, he never sought another relationship.

In recent years, most of Ku Shi’s income has been donated to the welfare institute.

Xiao Yu was surprised.

So, a good man after all?

Investigations revealed many teachers and students held Ku Shi in high regard.

Gentle, reliable, frugal, kind… and an exceptional educator!

Meanwhile, National Security’s five-hour interrogation session had concluded.

Ku Shi was released due to a lack of concrete evidence…

……

Inside a laboratory.

This facility was established by the school to develop drugs for treating psychological disorders.

Xiao Yu scanned the items inside the lab.

He Yu had once described it as the place where she formulated her potions.

National Security also found some raw materials for drug preparation there.

Yet, this lab had no connection with Zhuang Yi whatsoever.

“Was my instinct off?” Xiao Yu frowned.

At that very moment…

He was gripped by a sense of urgency—a feeling of otherworldly schemes and the need to return to Earth.

It’s as if he was being forced to transform into a monster, or that a trump card was about to be played… Xiao Yu exhaled a deep, resigned sigh.

He closed his eyes, and when he opened them again, his gaze was numb and cold.

His expression had turned indifferent, devoid of any emotional fluctuation.

Simulating a criminal’s mindset, he thought…

“If I were the mastermind—a hypnosis master—who developed this potion, what would I do next?”

“Experiment!”

“Why not follow proper experimental procedure? Because it wouldn’t work.”

“Using the formula He Yu provided verbally, the drug tests revealed its primary component targets the body’s pain receptors, inducing numbness… affecting the central nervous system and dulling the pain response. But the drug itself is so stimulating to the brain that it causes hallucinations and drives the central nervous system into a state of uncontrollable frenzy!”

“So, did I plan on testing the potion illegally? Didn’t I know that was a crime?”

“I was fully aware—that’s why I needed someone to carry out the experiment… He Yu?”

“But if it were merely about testing the potion, why resort to murder in such a shockingly brutal manner?”

“No, murder wasn’t the end goal. I aimed to… hide something? Cover something up? Or perhaps test a hypothesis?”

“This method requires that the person using the potion completes the experiment in a unique way?”

“Could it be, as per He Yu’s description, that it’s meant to turn this world into a living hell?”

“No, not at all. That was merely a decoy—a pawn I deliberately set in motion. But one thing is clear: the potion has been refined and perfected time and again…”

“And its effects? No pain? Hallucinations? Bloodthirsty frenzy? Or… self-destruction?”

“No, none of those. They were all deliberately staged to mislead others—a misdirection achieved through hypnosis combined with the potion. Even the drug traces left in the deceased were intentionally planted to mask the true function of the potion… what exactly is that function?”

Xiao Yu suddenly looked up, a hypothesis forming in his mind.

The idea was so outrageous and daring that it sent shivers of electric fear through his body.

He trembled as if electricity were coursing through him.

“Brother Wang!” Xiao Yu shouted.

“What is it?”

Wang Dong rushed in from outside the lab.

“Check the drug residues in the bodies of the last five victims, as well as in Lv Jinyan’s body.”

Xiao Yu enunciated every word to Wang Dong, “Don’t test anything else—just tell me if it can… trigger addiction!”

Had he just thought of something?

A new type of illicit product!