Chapter 180: As Long as Something Was Tampered With, Traces Will Surely Be Left Behind

This information didn't need him to say it—Yu Dazhang already knew.

The case file has a detailed record of this time.

The video conference at the time was also preserved as audiovisual evidence.

The exact time was the twelfth minute after the video conference began.

Liu Zhengyang first showed symptoms of loss of consciousness, then gradually slid off the chair and collapsed onto the floor.

The entire process took less than a minute.

"Did he take his medicine before the meeting that day?" Yu Dazhang continued to ask.

This was the very question the investigating officers before had missed.

Because the forensic examiner's conclusion was natural death, the officers involved at the time ruled out the possibility of drug poisoning.

That was the mistake of jumping to conclusions.

"He did," the butler answered crisply:

"I remember it very clearly. I brought Mr. hot water at the time and watched him take the medicine."

"Do you remember how many minutes before the meeting?" Yu Dazhang pressed.

The butler seemed not to have expected him to ask in such detail; after thinking for a moment, he answered:

"I can't remember the specifics—probably around ten minutes."

What a clever timing… Yu Dazhang calculated silently.

Ten minutes before the meeting, plus falling ill twelve minutes after the meeting began.

In other words, Liu Zhengyang's heart attack struck more than twenty minutes after he took his medicine.

"You said you watched Liu Zhengyang take the medicine?" Yu Dazhang repeated the butler's words back to him.

"Yes," the butler answered with certainty.

Yu Dazhang's mind raced at full speed. After running through every possible scenario for something going wrong, he asked:

"Was the amount he took that day any different from usual?"

"Nothing different—the same as always," the butler answered with great confidence:

"Bringing the medicine and the water every day is something I do personally. I remember very clearly how many pills of each kind he takes—there is absolutely no mistake."

The reason Yu Dazhang kept circling back to the question of the medicine was that the only method he could think of to murder Liu Zhengyang was this one.

To make Liu Zhengyang die of a heart attack without anyone noticing could only be done by tampering with the medicine he took.

Whoever could do this had to be someone at his side.

An outsider couldn't even get into their house.

But the situation now was: the medicine was fine, and the dosage was fine.

The case file states clearly that after the incident, the investigating officers took the two kinds of medicine Liu Zhengyang normally took back for testing.

The final result showed: the medicine had no problems.

That was also one of the reasons the officers at the time ruled out drug poisoning.

And what Liu Zhengyang took before his attack was precisely these two medicines.

"Let's leave it here for now. If I have more questions, I'll contact you again."

Yu Dazhang's mind was a bit muddled right now:

"If you remember any new details, you can contact me too. My phone is on twenty-four hours a day."

He now urgently needed to be alone for a while, to carefully sort through the information he had just obtained.

After ending the call, Yu Dazhang quickly fell into deep thought.

The investigative direction wasn't wrong—the other party must have made their move before the video conference began.

And they must have performed some kind of treatment on the medicine.

The post-incident drug test showed no problems, the dosage was correct, and he didn't take the wrong medicine either…

So how did the other party make Liu Zhengyang have a heart attack?

Yu Dazhang ran through every possibility and still couldn't figure out how the other party had done it.

Back in police academy, when the teacher said criminals could be highly intelligent, he had been quite unconvinced, believing no criminal could escape the sanction of the law by sheer IQ.

Now he believed it.

There really are people who can make a crime seamless.

No.

It's that he hasn't investigated thoroughly enough yet… Yu Dazhang silently rallied himself.

There must be something he hadn't thought of.

Since the other party was meticulous to the finest hair, he had to be exhaustive in every detail. No detail could be overlooked!

"As long as you've tampered with something, you will definitely leave traces behind."

Yu Dazhang was replaying the conversation with the butler in his mind, while muttering absently:

"Your IQ can make traces disappear, but some traces were never meant to disappear."

"For example…"

I know… Yu Dazhang's eyes lit up. He immediately went to the entrance of the detachment and called Ma Jian and the others out.

"You two go to the evidence room. There are two bottles of medicine sealed there from Liu Zhengyang's sudden-death case. Go fetch them. The evidence numbers are recorded in the case file. Once you have them, come find me at the technical division."

"Got it."

After the two agreed, one went to the evidence room and the other went to check the case file.

Yu Dazhang took out his phone again and called Qian Cheng:

"Brother Qian, are you at the technical division?"

"I'm here." The moment Qian Cheng heard it was Yu Dazhang, his voice unconsciously rose a few notches:

Not a single mistake, not a single typo—the entire content is here for you to read!

"Got another case?"

"That's why you get me." Yu Dazhang said with a smile:

"This time I need your help again—I'm heading to the Technical Section in a bit to run a fingerprint check."

For things like physical evidence examination and fingerprint comparison, the Technical Section won't give you an answer on the spot.

Generally it takes one to two working days to get a result.

During that period you have to go through the proper procedures, and you also need a written report.

But if you have an insider in the department, it's a different story.

If you skip those procedures and don't need a written examination report, they can give you a result on the spot.

Especially with fingerprint checks—at the fastest, it only takes a few minutes to finish.

"No need to stand on ceremony with me."

Qian Cheng's relationship with Yu Dazhang could be described as close, so naturally they spoke much more casually:

"Come on over, I'll be waiting for you."

I, Yu Dazhang, am a man with connections too... The moment he thought about having an insider of his own in the Technical Section, he felt his backbone stiffen.

Within the system, personal relationships matter a great deal.

If a person is well-liked and has a wide social circle, not to mention anything else, just the efficiency of getting things done improves a lot.

You have to understand—in some departments within the system, the time it takes to go through procedures can drive a person crazy.

He arrived at the Technical Section.

The moment Qian Cheng saw Yu Dazhang, he immediately asked:

"What case?"

It's worth mentioning that at this commendation conference, he also received an individual Third-class merit.

During the Top-Tier Hospital case, Qian Cheng had been assigned by Yu Dazhang to the arrest squad, so when the merits were reported, he was included as well.

In a department like the Technical Section, as long as you can endure the grind, earning a collective merit is no difficult matter.

But earning an individual merit—now that's simply hellish difficulty.

Why?

No chance, that's why.

Examining crime scenes, assisting in solving cases—these are all done by the department, and basically there's no opportunity for individual performance.

This time, even Qian Cheng hadn't expected that he would end up on stage to receive a decoration.

It all happened so suddenly—out of nowhere, he became the most dazzling guy in the Technical Section.

"A cold case from our branch." Yu Dazhang replied.

There was nothing to hide between him and Qian Cheng, and besides, there was nothing classified about this case at the moment.

"Your nerve is getting bigger and bigger."

The moment Qian Cheng heard it was a cold case, a look of worry inevitably appeared on his face:

"You even dare touch a cold case—I think you've really gotten too full of yourself."

(End of chapter)