Rebirth 2014: I, the King of Criminal Investigation

Chapter 181 The more you pursue perfection, the more loopholes you will find

When you are in the arena, you have no choice... Yu Dazhang sighed helplessly:
"I've already answered the phone. It's too late to say anything now."

This is what only friends can say.

If it were any other colleague with whom he had an average relationship, Qian Cheng would definitely cheer him up, say some encouraging words, and encourage him to work hard.

Such words sound nice, but they are too hypocritical.

Before the two of them could say a few words, Ma Jian arrived with physical evidence.

Seeing that he was a little out of breath, I knew he had jogged all the way here.

The two bottles of medicine were placed in two evidence bags.

From the appearance, the two medicine bottles are one large and one small, and the bottle bodies are both pure white.

"These are the two bottles of medicine." Yu Dazhang pointed at the evidence bag and said:
"You don't need to open the bottle. You just need to detect fingerprints on the bottle. If fingerprints are detected, help me identify how many people they belong to."

The fingerprint test he is now requesting is not mentioned in the case file.

In fact, this was not an oversight by the police officers who handled the case before.

Liu Zhengyang did not die of poisoning, and there was no problem with the medicine itself, so there was no need to inspect the medicine bottle.

In other words, even if fingerprints are detected on the medicine bottle, it does not prove anything.

As long as the medicine is fine, it doesn't matter who has touched it.

"give it to me."

Qian Cheng took the two evidence bags from Ma Jian and turned to walk into the inner room.

Yu Dazhang and the others did not follow in. Instead, they found a chair outside and sat down, waiting for the result.

About twenty minutes later, Qian Cheng came out from the inner room and handed the two evidence bags containing medicine bottles back to Yu Dazhang:
"I checked carefully, and there are no fingerprints on the bottle."

"No?" Yu Dazhang showed a questioning look:
"Not a single fingerprint?"

Seeing that he didn't believe him, Qian Cheng curled his lips in dissatisfaction:

"There's one more, and there's not even a single fingerprint. I even tried two different detection methods, and the results were the same."

It was handled so cleanly... Yu Dazhang looked puzzled on the surface, but he was ecstatic in his heart.

This result was exactly the same as he had guessed before.

Even more accurate than he guessed.

Why are there no fingerprints on the surface of the medicine bottle?
There is only one answer: the drugs were swapped!
Apart from this, there is no other reasonable explanation that can explain this matter.

Could it be that the murderer wiped the fingerprints off the medicine bottle?

Yu Dazhang had already thought about this question a long time ago.

Think differently.

If the murderer had not tampered with the drugs themselves, why would he have gone to the trouble of wiping fingerprints off the bottles?
Isn't this just a waste of time and trouble?

Only after the original medicine is taken away will the traces left on the bottle be erased when it is returned in order to cover up the fact of substitution.

Although this may be unreasonable, the murderer was obviously confident that the bottle would not be detected.

Even if it was really taken for testing, since the fingerprints had been cleared away, there would naturally be no clues to be found.

Double insurance!

He is also an obsessive-compulsive patient who pursues perfection...Yu Dazhang once again labeled the murderer in his mind.

As I said, there are no perfect people or things in the world.

The more you pursue perfection, the more loopholes there will be.

For example now...

Although the murderer could not be identified through fingerprints, one crucial key point was confirmed.

Liu Zhengyang was indeed murdered.

After leaving the technical department, Yu Dazhang called Liu Miao again.

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

"All relatives and friends who are close to them should be investigated. The more detailed the better."

After hearing this, the two looked at each other, both a little puzzled. Ma Jian couldn't help but ask:
"Do you suspect that Liu Zhengyang's children harmed him?"

There was one more thing he didn't say.

Even if Liu Qi or Liu Siyuan killed his father, there is no need to check their social relations.

Liu Zhengyang was not killed by a killer, and no suspicious person entered Liu's home during the time of his death. This is enough to prove that there was no outsider assisting in the crime.

"Can't I doubt it?" Yu Dazhang asked back:
"Liu Zhengyang's social relations have been investigated. It's on the case file. Is it wrong for us to continue to investigate in depth?"

"That's not what I meant." Ma Jian quickly explained:

"I just don't understand the reason for checking their social relationships."

Liu Miao next to him also nodded, indicating his agreement with Ma Jian's statement.

Unexpectedly, Yu Dazhang didn't even bother to tell them his thoughts. He just glared at them:

"I just like to check some unimportant things. What you need to do is obey my orders instead of questioning me."

The police force is not a police academy. He has no obligation to teach his colleagues how to solve cases, and he doesn't have the time anyway.

In order to improve case handling efficiency, team members must obey the team leader's orders unconditionally and must resolutely carry them out as long as they are related to the case.

This case is already mind-boggling enough, and Yu Dazhang really has no energy to do anything else.

In his opinion, any link that is not recorded in the case file should be checked.

Often it is something that seems insignificant, but may be an important clue.

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

They were on the same level before, and the sudden change of status made Ma Jian unable to adapt for a while.

Yu Dazhang’s attitude just now made him react all of a sudden.

Seeing this, Liu Miao hurriedly followed.

In fact, the police officers who handled the case before had also investigated this aspect.

But the investigation was not so detailed.

All the people in the Liu family who had contact with Liu Zhengyang had corresponding records.

However, from the conversation recorded above, it can be seen that the previous police officers focused their investigation on hiring a killer.

This is indeed the most suspicious aspect.

Apart from this, the servants of the Liu family had no motive to kill Liu Zhengyang.

Liu Qi and Liu Siyuan were directly cleared of suspicion of hiring a killer.

Who would hire another's children to kill their own father? Only a lunatic could come up with such an idea.

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

Yu Dazhang did not suspect Liu Qi and Liu Siyuan, the siblings, as Ma Jian said. He suspected all the Liu family members.

The reason why Ma Jian and others were asked to investigate the brother and sister first was to allow them to investigate more thoroughly.

If they were directly asked to check all the social relationships of the Liu family, the workload would be huge and they would inevitably do things perfunctorily.

After returning to his desk, Yu Dazhang took out a notebook and wrote down the names of the characters one by one.

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

On the day Liu Zhengyang was murdered, he wrote down the names of everyone who appeared in the Liu family villa in the afternoon in a notebook.

Why is it afternoon?

Because according to the housekeeper's notes, Liu Zhengyang takes medicine three times a day.

Once in the morning, noon and evening.

On the day of his death, he took the medicine at noon, which means that the medicine had not been replaced at that time.

The murderer swapped the drugs after noon, in front of the video conference, and returned the drugs after Liu Zhengyang's death.

There is another question that cannot be explained.

Why did the autopsy a year ago find no signs of drug poisoning in Liu Zhengyang?

(End of this chapter)