civil forensic

Chapter 169 Look at the case
A tall criminal policeman crept in through the back door.

The small lecture hall of the Qinghe Bureau has a height of one and a half floors, and there is a special fire exit at the back door, and not many people are usually willing to walk.

But today, in order to sneak in during class, and are too embarrassed to come in in front of everyone, many people choose to go through the back door.

There are about twenty or so of them.

Counting it down, it is almost a squadron of people.

If so many people illegally go through the back door, it will take a large team to catch them all.

But at this moment, it was Chen Wenming, the team leader of the trace inspection team of the Criminal Division of Qinghe Bureau, who was going through the back door.

He also received a text message from Cao Keyang, so he couldn't help but come over to take a look.

The Qinghe Bureau does not handle cases by itself. The criminal police detachments under its jurisdiction do most of the work on weekdays. They guide the criminal police teams in various places, collect various indicators and figures from various places, formulate various work requirements, serve the grassroots, upload and distribute, etc...

In this environment, the role of criminal science units is more easily highlighted.

For example, the Criminal Division Brigade that should have been established by the Qinghe Bureau has been transformed into a more professional criminal division, and there is also a trace inspection team.

Some county bureaus can't do it, or can't do the technical inspection well, so they are sent to the county bureau's criminal center.For example, Ningtai County does not have its own document inspection. In terms of trace inspection, the ability to inspect tools is also very weak, and the ability to inspect traces of firearms is basically non-existent.

What is also not available is the footprint inspection. At least in the past, the footprint inspection in Ningtai County was also sent to the Qinghe Bureau.

Chen Wenming is the footprint inspector of the Qinghe Bureau and a well-known footprint expert in the province.

Previously, in Jiang Yuan's footprint case, the person who made a mistake in terms of height was the footprint expert Chen Wenming.

And Chen Wenming, of course, also heard about it.

This made him subconsciously avoid Jiang Yuan's training class.

It wasn't until the "actual combat" story of Jiang Yuan doing fingerprints on the spot that Chen Wenming came to watch the battle.

He is a well-known footprint expert at the Municipal Bureau, but as a trace inspection technician, he can also do fingerprints. Moreover, Chen Wenming's fingerprints are also quite good, but he is not enough to participate in the provincial fingerprint competition.

It was also because of this that Chen Wenming always felt that Jiang Yuan's "actual combat class" was a bit too gimmicky.

Chen Wenming stretched out his head to look down, and saw Jiang Yuan was looking at the screen without even glancing at himself.

In the small lecture hall with 60 to [-] seats, there are about [-] NO.[-] people sitting at this time.

A small half of them do not need to attend training courses.

Chen Wenming curled his lips, found the location of Cao Keyang in the same group, and groped his way there.

After a break between classes, Cao Keyang has stepped back to the middle position, but his eyes are still a little blurred, his mood is still a little sad, and the emo is too lazy to wait on Jiang Yuan.

"How is it?" Chen Wenming sat next to Cao Keyang and asked in a low voice.

Cao Keyang laughed twice and said, "Now mark the fifth feature point."

"That's why you bid four times and didn't win?" Chen Wenming couldn't help laughing.

Marking the feature points four times is actually not much.Generally, if the fingerprints collected on the spot are not comparable, they will be marked at least three or four times, and only after four or five times will they give up.

If it's an important murder case, it's normal to mark it more than a dozen times, or more than [-] times.

The number of accumulated case marks is even more.Most of the trace inspections and fingerprints are tested.

This is the most normal way to do it.

But as far as the psychological feeling is concerned, if you fail to hit the mark four times, you feel that the probability of hitting again is not high.

Instead, it was Cao Keyang who spoke for Jiang Yuan, saying: "Because the selected fingerprints are difficult ones, so in the previous class, it was not normal to score four times."

"Under normal circumstances, it would be impossible to compare fingerprints on the spot like this." Chen Wenming frowned and said, "Fingerprint comparison itself is somewhat accidental."

Cao Keyang nodded immediately: "Yes, I think so too."

"Fingerprints can't match, it's commonplace. No matter how good the fingerprints are, what can you do if Curry doesn't have the corresponding fingerprints?" Chen Wenming sighed.

"Yes, yes." Cao Keyang agreed.

"This kind of on-site comparison of fingerprints can easily give everyone a bad impression, as if fingerprint identification is something that can produce results in minutes." Chen Wenming sighed again, thinking in his heart, if it wasn't for the last footprint, You have to speak up for yourself.

However, it was precisely because Jiang Yuan's footprint identification not long ago overturned Chen Wenming's own footprint identification, and thus solved a murder case.Chen Wenming felt that it was not good for him to come forward to educate Jiang Yuan.

Educating him now, it seems that he has no tolerance for others.

Chen Wenming then looked at the screen, feeling a little regretful and regretful, but also a little helpless and tired.

It is easy for young people to go astray amidst the honor and applause. This is not a problem at all. People always have to go through something to grow...

"I didn't win this time either." Jiang Yuan's voice came from the lecture hall.

Chen Wenming's mouth twitched unconsciously.

As expected.

No matter how powerful a fingerprint expert is, the probability of winning the fingerprint is not high.

This point can be known by looking at the fingerprints of suspects that are constantly accumulating in the fingerprint library.

If fingerprints are so good, there will be no fingerprints in the fingerprint database.

Today's criminals, who are a little smarter, know how to hide their fingerprints.

Like three or forty years ago, the era of blood fingerprints everywhere is over.

Of course, the magic height is one foot high, and the fingerprint extraction technology is constantly improving.

Technologies such as extracting fingerprints from plastics and fabrics are now very mature.

It's just that the fingerprints extracted from these places are not in good condition.

To compare these fingerprints, the difficulty has increased by many times.

Therefore, no matter from which angle it is analyzed, Chen Wenming does not think that "practical" lectures are an option.

At this time, Jiang Yuan's voice came again: "Let's mark the feature points again."

Chen Wenming then adjusted his seat and prepared to take a good look at it.

Then, I heard Jiang Yuan said: "Mark feature points, especially mark feature points multiple times, we have to learn from the previous marks. So what have we learned from the previous feature point marks?"

Chen Wenming was taken aback for a moment, and couldn't help being surprised: Can you still think like this?

Jiang Yuan continued in a lecture tone, and said: "Look at the markings of the feature points I made before, it is easy to see that the middle part has been marked in the marking of the feature points many times, because here The conditions are better, it is easy to find the feature points, right.”

Someone in the field nodded in cooperation.

Jiang Yuan said again: "If it is an ordinary fingerprint, there is no problem with our previous marking mode. It must be marked well. However, we have failed to mark many times now. I think we have to reconsider the feature points. mark range."

Jiang Yuan drew a circle on the fingerprint with the mouse, and said: "We have marked the feature points here many times before, and the matching fingerprint conditions are also average, so we will not mark the feature points in the circle this time. .”

"It's a little bit difficult. In this case, the difficulty will be increased a lot, but from my understanding, increasing the difficulty is actually a prerequisite for fingerprinting. Curry's difficult fingerprints, the more difficult they are, the easier they are. Compare."

The truth Jiang Yuan expounded did not touch the newcomer Trace Inspection.

Half of the people here usually mainly collect fingerprints, and they have never compared the fingerprints in the fingerprint database. Now it is easier to compare when it is more difficult, and the inner meaning of it is somewhat beyond the scope of understanding.

Chen Wenming listened right away.

His fingerprint level is not very high, but his footprint identification level is indeed first-class in the province.

In his daily work, Chen Wenming had actually discovered this truth a long time ago.

The footprints involved in those long-standing cases, especially the footprints involved in major and important cases, are simpler and more routine, and more difficult to compare.

Think about it carefully, if such footprints can be compared with the previous traces, why did they leave the footprints until this time.

It has to be a difficult footprint, which is easier to compare.

Especially the footprints that are beyond the range of most people, once the entry point is found, the probability of hitting is ridiculously high.

From a certain point of view, this is equivalent to coming up with a new technology.

Using new technologies to reduce the number of criminals, so as to get "easier than the middle" situation.

Chen Wenming then nodded slightly again.

As expected, in a footprint appraisal, the person who accidentally defeated himself can really sum up something.

As for specific abilities...

"This time the difficulty is relatively high, so I will mark it first, because the method used is quite special and not very referential..." Jiang Yuan's voice was slightly soothing, and he still operated while speaking.

Chen Wenming stared at it for a while, and sure enough, he realized that it was a very special method - because he had never seen it before.

Chen Wenming couldn't help thinking about it.

He was not at the same level as the other trace inspections below, so he naturally didn't belong to the group that Jiang Yuan said was too difficult.

However, before Chen Wenming figured it out, Jiang Yuan had already marked more than a dozen feature points along the way.

"Let's run again to see." Jiang Yuan finished marking and threw it into the software. He even had time to drink tea.

Chen Wenming watched with a frown, and saw 20 similar fingerprints jump out.

Jiang Yuan still watched at a fast speed.

It didn't take much time to look at more than a dozen fingerprints in a row.

Chen Wenming was already getting a little impatient. Lectures like this were not attractive at all.

He turned his head to look at the back, but unexpectedly discovered that a group of guys who usually don't take part in the training very seriously are actually watching it very seriously at this time.

Chen Wenming thought about it, when did the trace inspection become a spectacle.Even if it attracts everyone's attention, how can it last...

"I won the competition." Jiang Yuan's crackling sound stopped at some point.

Chen Wenming raised his head quickly.

Jiang Yuan said again: "This is another fingerprint connected to another case. Well, these two fingerprints should be identified as the same, and then they should be dealt with together."

The merger means that it is possible to bring more clues.For the detection of the case, it is always beneficial.

Then, Jiang Yuan began to fill out the appraisal report for the same identification.

A policeman shouted from below:

"Look at the case."

"Let's call."

A smile appeared on Jiang Yuan's face, and he waved his hands at the lecture hall, saying, "Don't rush to make a call."

After writing the appraisal report, he opened the case.

One was burglary, the other was robbery.

Chen Wenming's eyelids twitched unconsciously.

These two cases are quite heavyweight.

Jiang Yuan also looked at it carefully for a while, and then said: "The two cases are quite serious, so let's do it in a different way."

So, Jiang Yuan sacrificed Photoshop.

(End of this chapter)