Chapter 181: The More One Pursues Perfection, the More Loopholes There Are

One is powerless in the world... Yu Dazhang sighed helplessly:

"Since I've already taken it, it's too late to say anything now."

These are words only friends can say to each other.

If it were just an ordinary colleague, Qian Cheng would surely encourage the other person, say some uplifting words, and urge them to try hard.

Such words sound good, but they are too hypocritical.

Before the two could exchange a few more words, Ma Jian arrived with the physical evidence.

Seeing him panting slightly, it was clear he had run the whole way.

The two medicine bottles were placed separately into two evidence bags.

From the outside, the two bottles were one large and one small, both with pure white bodies.

"These are the two medicine bottles." Yu Dazhang pointed at the evidence bags and said:

"No need to open the bottles; just test for fingerprints on the bottle bodies. If fingerprints are found, help me distinguish how many people's they are."

The fingerprint test he now requested was not mentioned in the case file.

Actually, this did not count as an oversight by the officers who handled the case previously.

Liu Zhengyang did not die from poisoning, and the medicine itself had no problems, so there was no need to test the medicine bottles.

In other words, even if fingerprints were found on the medicine bottles, it would prove nothing.

As long as the medicine was fine, it didn't matter who had touched it.

"Leave it to me."

Qian Cheng took the two evidence bags from Ma Jian's hands, turned around, and walked into the inner room.

Yu Dazhang and the others did not follow him in; they found a chair outside and sat down, waiting quietly for the results.

After about twenty-some minutes, Qian Cheng walked out of the inner room and handed the two evidence bags containing the medicine bottles back to Yu Dazhang:

"I checked carefully; there are no fingerprints on the bottle bodies."

"None?" Yu Dazhang showed a skeptical expression:

"Not even a single fingerprint?"

Seeing that he didn't believe him, Qian Cheng dissatisfiedly pouted:

"Not even half a fingerprint. For this, I even switched to two different testing methods, and the results were the same."

It was cleaned too thoroughly... Yu Dazhang looked puzzled on the surface, but inside he was ecstatic.

This result was exactly the same as his previous guess.

It was even more accurate than his guess.

Why were there no fingerprints left on the surface of that medicine bottle?

There was only one answer: the medicine had been swapped!

Besides this, there was no other reasonable explanation that could make sense of this matter.

Couldn't it be that the killer wiped the fingerprints off the medicine bottle?

Regarding this question, Yu Dazhang had already considered it long ago.

Think from the other side's perspective.

If the killer had not tampered with the medicine itself, then why would he bother wiping off the fingerprints on the medicine bottle?

Wouldn't that be an unnecessary act, inviting trouble for oneself?

Only by taking away the original medicine, in order to cover up the fact of the swap, would one erase the traces left on the bottle body upon returning it.

Although doing this had unreasonable aspects, the killer was obviously certain that the bottle body would not be tested.

Even if it really was taken for testing, since the fingerprints had been cleared cleanly, naturally no trace could be found.

Double insurance!

Still a perfectionist with obsessive-compulsive tendencies... Yu Dazhang once again labeled the killer in his mind.

It is still that same saying: there are no perfect people or things in the world.

The more one pursues perfection, the more loopholes there are.

For example, right now...

Although the killer could not be locked down through fingerprints, one crucial key point had been confirmed.

Liu Zhengyang was indeed murdered.

Leaving the technical section, Yu Dazhang called Liu Miao over.

"You two go separately to investigate the social connections of Liu Zhengyang's children."

"Investigate all relatives and friends who are close to them; the more detailed, the better."

Upon hearing this, the two looked at each other, both somewhat confused. Ma Jian couldn't help but ask:

"Do you suspect that Liu Zhengyang's children killed him?"

There was another sentence he didn't say.

Even if Liu Qi or Liu Siyuan had killed their own father, there would be no need to investigate their social connections, right?

Liu Zhengyang was not killed by a hitman, and no suspicious personnel entered the Liu family during the time of death; this was enough to prove that no outsider assisted in the crime.

"Can't I suspect?" Yu Dazhang retorted:

"Liu Zhengyang's social connections have already been investigated; it's in the case file. Is it wrong for us to continue investigating in depth?"

"I didn't mean that." Ma Jian quickly explained:

"I just can't quite figure out the reason for investigating their social connections."

Liu Miao, standing nearby, also nodded along, indicating agreement with Ma Jian's statement.

Unexpectedly, Yu Dazhang simply had no intention of telling them My own idea; he was seen glaring:

"I just like to investigate trivial matters. Your duty is to obey orders, not to question me."

The police force is not a police academy; he has no obligation to teach his colleagues how to solve cases, besides, he has no time for that.

No mistakes, one sentence, one release, one content, one look inside!

To improve case-solving efficiency, team members must unconditionally obey the team leader's orders; as long as it relates to the case, it must be carried out resolutely.

This case is already brain-burning enough; Yu Dazhang truly has no energy to do anything else.

In his view, every link not recorded in the case file should be investigated.

Often, it is something that appears trivial but could be an important clue.

"I'll go right now," Ma Jian said immediately.

Previously they were equals; the sudden shift in status made Ma Jian unable to adapt for a moment.

Yu Dazhang's attitude just now made him suddenly realize.

Seeing this, Liu Miao hurriedly followed them.

Actually, the officers who handled the case before had also investigated this aspect.

But they did not investigate as meticulously.

Everyone in the Liu family who could contact Liu Zhengyang had corresponding transcripts.

However, from the dialogues recorded above, it can be seen that the previous officers focused their investigation on hiring someone to commit murder.

This is indeed the most suspicious aspect.

Besides this, the servants in the Liu family had no motive to kill Liu Zhengyang.

And Liu Qi and Liu Siyuan were directly ruled out of suspicion for hiring someone to commit murder.

Who would hire the other's children to kill their own father? Even a madman couldn't think of such an idea.

This is also the main reason why the previous officers did not investigate their social relationships.

Yu Dazhang was not, as Ma Jian said, suspecting the siblings Liu Qi and Liu Siyuan; he suspected all members of the Liu family.

The reason he let Ma Jian and the others investigate these two siblings first was to make them investigate more meticulously.

If they were directly made to investigate the social relationships of all Liu family members, the workload would be huge, and perfunctory handling would inevitably occur.

Returning to his desk, Yu Dazhang took out his notebook and wrote down the names of the people in order.

Daughter Liu Qi, son Liu Siyuan, butler, nanny...

On the day Liu Zhengyang was murdered, everyone who appeared at the Liu family villa in the afternoon was written down one by one in his notebook.

Why the afternoon?

Because according to the butler's transcript, Liu Zhengyang took medicine three times a day.

Once in the morning, once at noon, and once in the evening.

On the day of his death, he had taken his medicine at noon, indicating that the medicine at that time had not yet been swapped.

The murderer swapped the medicine after noon, before the conference video, and switched it back after Liu Zhengyang's death.

There is another question that cannot be explained.

Why did the autopsy a year ago fail to discover signs of drug poisoning in Liu Zhengyang?

(End of this chapter)