Chapter 792: Woman in headscarf
The fingerprint comparison quickly produced the results.
Unfortunately, there is no fingerprint information of the target person in the fingerprint database.
“No?”
Zhang Hui originally thought that by using Lu Chuan’s fingerprint identification, he could directly identify the murderer and settle the case.
But unexpectedly, there were no fingerprints in the system!
“I think there are two steps. The first is to collect fingerprints of all the people in the hospital and then compare them.”
Thieves cannot be ruled out until now, that is, the inside of the hospital personnel.
Because the other party knows too much about the process of keeping birth certificates in the health department.
And the other party knows the structure of the hospital building very well.
Until all rooms are connected by ventilation ducts.
This is not like an outsider committing the crime, but more like an insider.
So, Lu Chuan needs to collect fingerprints from all staff in the hospital, including those who are hospitalized.
“Second, within a period of time before and after the day of the incident, all persons entering and exiting the hospital must be screened.”
“The fingerprints collected from the ventilation ducts are relatively thin. It is very likely that it was a female fingerprint.”
"So my opinion is to focus on women entering and leaving the hospital."
Although Zhang Hui is a little unwilling, it is obvious that there is no better way now.
If the people in the hospital do not have fingerprints on the specific gravity ventilation ducts, then only a large-scale search can be carried out.
This may not be a matter of one or two days.
On the same day, Zhang Hui asked Qin Yong for instructions, and he agreed with Lu Chuan's suggestion.
Fingerprint collection in the hospital is relatively simple.
Department by department, no one will be left behind.
Including doctors, nurses, cleaning, logistics, personnel, etc., as long as they work in the hospital, all people must be fingerprinted.
In addition, patients also need to be fingerprinted.
Although it is possible that the other party was admitted to the hospital when he committed the crime last week and is now discharged.
But it is possible that he was not discharged from the hospital.
So, adhering to the principle of not missing it, all personnel collected it.
In addition to the first action group, the criminal investigation detachment also sent many people from the second and third action groups to help.
At the same time, Zhang Hui also began to conduct a key screening of all the surveillance cameras on the day of the incident, especially the two surveillance cameras that could be photographed after leaving the women's toilet.
Although due to the angle, the surveillance camera in the corridor could not capture the door of the women's toilet.
However, when the other party came out of the toilet, he could only leave along the two corridors on the left and right.
The other party committed the crime after the doctor got off work.
On the day of the incident, the police had retrieved the surveillance video in the corridor, and no one was found entering or exiting at night.
This means that the other party hid in the women's restroom before going to work in the hospital and did not leave directly after committing the crime.
On the contrary, it was after dawn on the second day, when there were more people working in the hospital, that the other party took advantage of the chaos and came out of the toilet, deceived the surveillance camera, and left the hospital.
Therefore, Zhang Hui focused on screening personnel information during the day on the day of the incident and the next morning.
In fact, this screening work is not difficult, but the workload is relatively large.
The principle is also very simple. Except for the suspect hiding in the toilet, other people entering the corridor should be continuously monitored by these two cameras.
So, as long as you find someone who does not have continuous surveillance video, it is possible to lock the other party.
Zhang Hui arranged for ten people to mark the people in the surveillance and then exclude them one by one.
The fingerprint collection work was completed in less than half a day.
Except for some people on business trips and vacations, everyone’s fingerprints have been entered into the system.
"How is it?"
Collecting fingerprints and entering them into the system is slow and requires a process, but Lu Chuan's comparison is very fast.
Yes or no, the data of hundreds of people can be compared in the blink of an eye. But it is a pity that the personnel at the hospital did not match the fingerprints.
"Fingerprints cannot be used to lock the opponent for the time being. We can only rely on your monitoring and analysis."
Lu Chuan spread his hands, there was really nothing he could do.
Zhang Hui sighed.
“The hospital has a lot of traffic after work. I have already arranged for ten people, and it seems that I will send more people.”
All members of the action team went into battle.
I spent the whole night and found nothing.
The maternal and child health hospital has a very large flow of people, especially those who come to apply for birth certificates. It is crowded as soon as work starts.
So the video analysis and stripping work is more difficult because there are too many people.
"Please note that the other person definitely did not go to apply for a birth certificate after coming out of the toilet, so he should not queue up."
Zhang Hui ate instant noodles and directed everyone to focus on the search.
"Although the other party's fingerprints are relatively thin, they should be left by women, so everyone should focus on women."
This point can also be seen from the fact that the other party chooses to do it in the women's restroom. It turns out the suspect may be a female.
"Please pay attention to the women who suddenly appear in the surveillance and leave without queuing up. If you find such people, please tell me immediately!"
"Brother Hui!"< br>
As soon as Zhang Hui finished speaking, a young man in the team who only came here last year raised his hand.
“This, this woman wearing a headscarf looks like me!”
Zhang Hui immediately ran over. In the surveillance screen, it was a thin woman wearing a headscarf. Because of the angle, The problem is, I can’t see the face clearly.
"Play a section and let me see."
The young man clicked the play button, and the woman entered the floor corridor from the end of the corridor.
Just as Zhang Hui said, the other party did not line up, but squeezed through the crowd and disappeared at the end of the corridor.
“The other party came from the direction of the women’s restroom. Of course, he didn’t necessarily come out of the women’s restroom. He might also have come in from the corridor at the other end of the corner.”
“But I checked. The surveillance of another corridor at the same time did not find that the other party appeared in the other corridor."
The young man immediately clicked on another video.
The video was recorded a little earlier than the time the woman appeared in the corridor just now.
However, no hijab woman appeared.
“Advance the time!”
Zhang Hui was a little excited.
What the heck, I finally found it!
The young man adjusted the time to ten minutes ago and started watching the video.
The two of them were concentrating on each other, and when the others saw what they had discovered, they came over to take a look.
There are many people who have been saved in the video, but this woman has not appeared for 10 minutes.
Real hammer!
“I caught you!”
Zhang Hui waved his fist excitedly: “Well done!”
"If the case is solved, I will give you credit!"
The young man was also very excited: "Brother Hui, can you become a full-time employee in advance?"
"The internship salary is too low..."
Now that the other party has been locked, the rest of the matter will be easier to handle.
From the moment the other party left the corridor of the health department, Zhang Hui chased the other party's surveillance camera all the way.
Finally at a corner, the other party looked up, came face to face with the surveillance camera, and left a positive message!
(End of this chapter)