Chapter 181 The more pursuing is perfect, the more loopholes
People cannot help themselves in the world... Yu Dazhang sighed helplessly:
"I have been connected, and now I say everything late."
This is what can only be said between friends.
If he were another colleague with whom he had a normal relationship, Qian Cheng would definitely cheer him on, say some encouraging words, and encourage him to work hard.
In this case, it sounds good, but it is too hypocritical.
Before the two said a few words, Ma Jian came with physical evidence.
Judging from the way he was panting, it was obvious that he had come here at a trot.
The two bottles of medicine were placed in two evidence bags.
Looking at the appearance, the two medicine bottles are one size and one small, and the bottle body color is pure white.
"That's the two bottle of medicine." Yu Dazhang pointed to the evidence and said:
"You don't need to open the bottle, you just need to detect the fingerprints on the bottle. If fingerprints are detected, help me identify who they belong to."
The fingerprint test he is now requesting is not mentioned in the case file.
In fact, this is not an oversight by the police officers who previously handled the case.
Liu Zhengyang did not die of poisoning, and there was nothing wrong with the medicine itself, so there was no need to test the medicine bottle.
In other words, even if fingerprints are detected on the medicine bottle, it won't prove anything.
As long as the medicine is good, it doesn't matter who has touched it.
"Leave it to me."
Qian Cheng took two evidence bags from Ma Jian and turned to the house.
Yu Dazhang and the others did not follow him in, but found a chair outside to sit down and wait for the result.
After about twenty minutes, Qian Cheng walked out of the back room and handed two evidence bags containing medicine bottles back to Yu Dazhang:
"I checked carefully and there are no fingerprints on the bottle."
"No?" Yu Dazhang looked questioning:
"Not a single fingerprint?"
Seeing that he didn't believe him, Qian Cheng curled his lips dissatisfied:
"There is still one, and there is not even half a fingerprint. For this reason, I also changed two detection methods, and the results are 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 what he had guessed before.
Even more accurate than he guessed.
Why does the surface of the medicine bottle leave fingerprints?
There is only one answer: the medicines have been swapped!
In addition, no other reasonable explanation can be said.
Can't the murderer wipe the fingerprint on the medicine bottle clean?
Regarding this question, Yu Dazhang has already considered it.
Thinking in other places.
If the murderer did not do anything about the medicine itself, why would he work hard to wipe off the fingerprint on the medicine bottle?
Isn’t this unnecessary and asking for trouble?
Only when the original medicine is taken away, in order to cover up the fact that the package has been swapped, will the traces left on the bottle be erased when it is returned.
Although there will be unreasonable places, the murderer obviously determines that the bottle body will not be tested.
Even if it is really tested, because the fingerprint has been cleaned, it is naturally impossible to find any clues.
Double insurance!
He is still an obsessive-compulsive disorder patient who pursues perfection... Yu Dazhang once again mentally labeled the murderer.
Again, there is no perfect person or thing in the world.
The more we strive for 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 killed.
Leaving the technical department, Yu Dazhang called Liu Miao again.
"You two go separately to investigate the social relationships of Liu Zhengyang's children."
"All relatives and friends who are close to them have to investigate, the more detailed the better."
After hearing this, the two of them looked at each other, a little confused. Ma Jian couldn't help but ask:
"Do you suspect that Liu Zhengyang's children killed him?"
There was a word he didn't say.
Even if Liu Qi or Liu Siyuan hurt his father, there is no need to check their social relationship.
Liu Zhengyang was not killed by a killer, and no suspicious persons entered Liu's house during the time of his death. This is enough to prove that no outsiders assisted in the crime.
"Can't I doubt it?" Yu Dazhang asked:
"Liu Zhengyang's social relationship has been investigated, and there are cases on the case. Are we continuing to investigate the wrong investigation?"
"That's not what I meant." Ma Jian quickly explained:
"I just don't understand the reason for checking their social relationship."
Liu Miao next to him also nodded, agreeing with Ma Jian's statement.
Unexpectedly, Yu Dazhang simply did not intend to tell them his thoughts, and saw him staring:
"I like to check some irrelevant things. What you have to do is obey the order, not to question me."
The police force is not a police academy, so he has no obligation to teach his colleagues how to solve crimes, and he doesn't have the time.
There is no mistake, one, one, one, one, one, one, one, one 619, one book, one, one, one, one, one, one, a book!
In order to improve the efficiency of case handling, team members must unconditionally obey the team leader's orders. As long as they are related to the case, they must be resolutely implemented.
This case is enough to burn my brain, and Yu Dazhang really has no energy to do other things.
In his opinion, any link that is not recorded in the case file should be checked.
Often it is something that looks irrelevant, but it may be an important clue.
"I'm going now." Ma Jian said immediately.
They were on the same level before, but Ma Jian didn't get used to the sudden identity change.
The attitude of Yu Da Zhang just reacted him all at once.
Upon seeing this, Liu Miao hurriedly followed.
In fact, the police officers who had had handler also conducted investigations in this area.
But the investigation was not so detailed.
All the people who can contact Liu Zhengyang have corresponding transcripts.
However, it can be seen from the dialogue recorded above that the previous police officers put the investigation direction in hiring murder.
This is indeed the most doubtful point.
Except for this, the maids of the Liu family did not kill Liu Zhengyang.
Liu Qi and Liu Siyuan were suspected of directly excluding the murder.
Who would hire the other party's children to kill their own father? Even a lunatic would never come up with this idea.
This is also the main reason why the previous police officers did not investigate their social relationship.
Yu Dazhang was not suspicious of Liu Qi and Liu Siyuan, as Ma Jian said, but he was suspicious of the entire Liu family.
The reason why Ma Jian checked the sisters and brothers first was to make them check them meticulously.
If they were directly asked to check the social relationships of all Liu family members, the workload would be huge, and it would inevitably be perfunctory.
After returning to the desk, Yu Dazhang took the notice book and wrote the name of the character in turn.
Daughter Liu Qi, Son Liu Siyuan, Butler, Babysitter ...
On the day of Liu Zhengyang's death, as long as he appeared in the Liu family villa in the afternoon, he was written on the book one by one.
Why is it afternoon?
Because according to the steward's transcript, Liu Zhengyang will take three medicines a day.
Once in the morning, middle and evening.
On the day of his death, he had taken medicine at noon, which meant that the medicine had not been swapped at that time.
After the murderer, the medicine was dropped before the meeting, and after Liu Zhengyang died, he replaced the medicine back.
There is also a problem that it is not explained.
Why did you find signs of drug poisoning in Liu Zhengyang a year ago?
(End of this chapter)