civil forensic

Chapter 168 The True Case

The small lecture hall of the Qinghe Bureau is located on the first floor of the office building.

The green plants inside are a bit dry, but no one cares.

It, together with other unimportant departments, opened its doors to welcome visitors from all over the world.Including people who don't know the truth, and police officers from all over the world who don't know the truth.

However, the utilization rate of the small lecture hall is still very high.

As a retreat agency, the Qinghe Bureau attaches great importance to the organization and reporting of various activities.Otherwise, its existence would be too meaningless.

In today's small lecture hall, quite a few people were seated, and then a tall young man was speaking slowly, as if a college student was giving a speech on the stage.

It's just that the atmosphere is quite different.

The young policeman wears gray epaulets, that is, a technical policeman. He wears a full set of police uniforms. He looks good. Although he does not look like a traffic star that is popular now, he can be regarded as a gentle and sunny boy. At the banquet, with a serious expression and a free-spirited expression, taking a random photo seems to be enough for publicity.

Jiang Yuan also wore a pair of plain glasses for this training. In fact, he is not short-sighted, but his face is tender, and the master said that it would be better to wear glasses.

On the other hand, the policemen sitting in the viewing booth looked at the projection screen nervously and solemnly, the muscles of their cheeks were obviously slightly touched, and their eyes were widened, very hard.

The 20 approximate fingerprints matched in the first pass are listed on the right side of the screen in a vertical row.

The three quarters on the left are the one with the highest assigned approximate fingerprint, which is completely displayed.

"Well, let's take a look at the fingerprints returned in the first pass."

Jiang Yuan pushed the unfamiliar glasses frame with one hand, grabbed the mouse with the other hand, clicked, and enlarged the fingerprint on the left to the full screen again.

On the projection screen, the fingerprints displayed synchronously are relatively clear.

"Well, there is an exclusion point here." Jiang Yuan clicked twice, enlarged the fingerprint again, and then drew a small circle on the right side of the fingerprint with his mouse, signaling for everyone to see.

For the fingerprints that have been matched, it is not the standard of how many feature points are consistent, but whether the feature points are inconsistent.

This is easy to understand. If two fingerprints are the same, theoretically, all their feature points should be the same.

Therefore, if two fingerprints have a feature point that is inconsistent, it can be determined to be "excluded".

That is, the two fingerprints are not the same, not the same fingerprint.

According to this idea, Jiang Yuan killed two similar fingerprints in a row.

At this time, Cao Keyang, who had already sat in the front row below, said, "Mr. Jiang, should we compare the two fingerprints? If you rule it out like this, everyone can't see it very clearly."

Jiang Yuan reacted quickly, and immediately tapped twice, so that the original fingerprint and the matching fingerprint appeared on the three-quarters of the left side of the screen at the same time.

"Sorry, I was thinking about the previous few fingerprints, so I can do it faster." Jiang Yuan said sincerely.

Cao Keyang felt an inexplicable sadness in his heart, and hurriedly said: "It's okay, this is not your problem, that is to say, we are giving lectures, so it is better to speak slowly and clearly."

"Enen, I'll pay attention." Jiang Yuan nodded, and said again: "Then let's rule out the first two fingerprints again."

Then, Jiang Yuan drew a circle on the right side with exactly the same movement.

The difference is that he then drew a circle on the left side as well.

As a result, the auditorium below finally made a coherent "oh" sound.

Seeing this, Jiang Yuan made persistent efforts, circled the second fingerprint and the third fingerprint, and persuaded him to leave.

The "oh oh" sound from the auditorium gradually decreased.

Technicians whose fingerprint level is lower than LV1 began to feel soreness in their hearts, that is, sour and astringent, indescribable feeling.

They finally understood that Jiang Yuan had recorded all the original and difficult fingerprints.

Therefore, just now is a method of elimination purely based on memory.

There is no need to compare, the original pattern is in the mind, and it is naturally very fast to eliminate or compare.

It's really nothing.

If you start preparing lessons a few days ago, it will take a long time for everyone to remember the fingerprint... part.

The key is who will do it?

Such fine fingerprints, no one expects to be remembered.

Fingerprints can be annoying.

On the contrary, Youhenjian will gradually remember the characteristics of the fingerprint when it has been paying attention to a certain difficult fingerprint for many years, but...

While some people were thinking wildly, Jiang Yuan ruled out three more similar fingerprints.

Then, I heard Jiang Yuan said: "At this time, it is generally recommended to read all 20 fingerprints. But we will not read it today, because the similarity of the fingerprints that come out is getting lower and lower, which means that the probability of being compared later is already low. very low..."

Cao Keyang was dumbfounded.

The crowd stayed.

Why is this feeling so familiar?

It's like, when I was still studying, I lowered my head to pick up a pencil, and raised my head again, so I couldn't understand the teacher's words.

Even the language at the last moment is the same: I won’t write about the following steps, because they are relatively simple, so let’s skip them, but the conclusion that can be deduced from this is...

Jiang Yuan didn't mean to stop.

The first wave of fingerprints was screened out, and Jiang Yuan pulled out the original fingerprints again, saying: "Now we mark the feature points for the second time."

dazzled,

Mesmerizing eyes,
Out of sight out of mind,
It's useless to bother
After the operation, Jiang Yuan re-completed the marking of thirteen marking points.

Jiang Yuandao: "The location we just marked is a relatively common mark point, and there is no comparison, which means that the previous trace inspection, the basic work is not bad, and the criminal suspect did not leave very clear full fingerprints for us to match. .No problem, let's try again."

Similar to the previous steps, Jiang Yuan threw the marked fingerprints into the fingerprint database for comparison.

After a while, the data returned by the fingerprint database is another 20 fingerprints.

"You still need to compare left and right?" Jiang Yuan asked Cao Keyang this time, expressing his politeness.

Cao Keyang nodded obediently, and looked at the projector calmly.

This time, he felt that he should be ready.

Three-quarters of the way to the left of the projector, two fingerprints are listed.

Jiang Yuan's mouse moved lightly, ticked a small circle on the left, ticked a small circle on the right, and said: "Excluded, right, it's similar to what I just said."

"The second one is also ruled out."

"Same."

"The following ones, we don't need to check them one by one."

While talking, Jiang Yuan quickly patted his fingerprints.

He taps the space bar on the keyboard, and a new fingerprint will appear on the screen to replace the old one.

Since Jiang Yuan didn't need to check the circle anymore, he just took a look, said "no", and then tapped the space bar again to put on a new fingerprint.

Cao Keyang stared at it at first, but soon fell back into the previous state:
eye

Remorse

eye

bother

For a moment, Cao Keyang almost thought he was watching short videos.

The screen is full of Internet celebrities, and they all look alike.

Take a look and brush away.

Take another look, and then brush away.

In a trance, half an hour passed.

At this time, Jiang Yuan also re-marked the feature points of the fourth wave, and said: "Actually, the feature points we marked just now are not very necessary, just to show everyone."

"If you have a chance in the future, if you practice proficiently, you can omit the marking mode just now, because the feature points marked just now are repeated with the previous two times. If it is just for trying, it will not be efficient."

"A more efficient way is to delineate a small area and then mark as many feature points as possible, so that the accuracy of the returned fingerprints will also be improved. Of course, the difficulty will also be higher."

"It's still the method just now..."

While Jiang Yuan was talking, there was the sound of tapping the space bar in the lecture hall.

Not only Cao Keyang, but most of the technicians in the lecture hall were a little numb.

Jiang Yuan did it too fast.

Everyone is a little behind.

They never thought that if Jiang Yuan followed their speed and explained while making fingerprints, wouldn't it take a few days for a difficult fingerprint.

The total time for one training session is only two sessions of 4 hours.

An older man, Hin Chi, made a clear coughing sound at this time, probably meaning he wanted to speak.

Everyone stared with bated breath, waiting for this brave big brother to speak out for everyone.

After all, it was training in the disciplined army. If the teacher was upset, it would be easy to fail.

The crackling sound suddenly stopped.

For almost half a minute, Jiang Yuan didn't speak or move.

The lecture hall was so quiet that Cao Keyang, who had given up a little, couldn't help but look up at the projection screen.

On the projection screen, there were still two fingerprints.

The original fingerprint on the left has the identity of a suspicious fingerprint, just like a young lady wearing hip-wrapped trousers, she looks naked, but she doesn't show anything.

The fingerprint in the fingerprint database on the right is ordinary, like a Frost Yujie wearing a professional suit, with sharp eyes, refusing movements, and no flaws in her body...

"I won the competition, right." Jiang Yuan added a sentence later, it must be part of the lecture.

Cao Keyang was dumbfounded, what does it mean to win the competition?
He looked at the original fingerprint on the left, and then at the fingerprint in the fingerprint database on the right.

It seems quite similar.

almost the same.

There are no flaws.

cannot be ruled out.

Then...wouldn't it just be the same?
In the end, is the beautiful woman with the hips and Sister Bingshuang the same?
Cao Keyang's people were all dumbfounded.

Not only Cao Keyang, but half of the policemen who were trained were dumbfounded.

At this time, Jiang Yuan began to skillfully write the "same certification" appraisal letter, and applied for review.

There were more than forty people in a room, and Jiang Yuan was the only one filling out the form.

Everyone understands the part of filling out the form.

"Wait a while for the review here, I'll find a phone number in the jurisdiction here." While speaking, Jiang Yuan said to the students: "I'm sorry to delay everyone for 2 minutes. After all, the criminal suspect has been locked. Be polite on the phone."

"It's all right." A group of policemen fidgeted and waved their hands.

Jiang Yuan then switched back to the details of the case, found the information of the police station in the jurisdiction, and laughed: "It's from Miaohe County, I talked to them on the phone before, wait a moment."

When Jiang Yuan was doing the province's fingerprint competition, he compared the fingerprints of a homicide case in Miaohe County, so he kept the phone number of the head of the Miaohe County Criminal Police Brigade.

Jiang Yuan dialed a phone number, and soon, he heard the laughing voice of the criminal police chief of Miaohe County: "Jiang Forensic Doctor, why call me when you have time, is it a good thing?"

"I just won an ordinary case, a robbery case more than six years ago... Yes, I will send you the specific information on the intranet, yes, yes, oh... the review passed... You are welcome, you are welcome"

Jiang Yuan was sitting in the lecture hall, and the radio was good. Almost all the conversations between the two on their mobile phones fell into everyone's ears.

All the technicians present were in a trance.

The captain of the criminal police in Miaohe County has such a good temper?

Can such a good-tempered person be the captain of the criminal police?

Also, what just happened?
In the eerie silence, Jiang Yuan completed the steps of sending information on the intranet.

"Okay, the re-examination has also passed, so this case of robbery six years ago is considered to have a new key clue. Next, it depends on Miaohe County being able to locate and arrest the suspect. For us As far as we are concerned, we have completed the fingerprint comparison of the case just now."

Jiang Yuan clicked on the few pages he had just opened, and he had completed the final finishing work.

"Let's find a typical fingerprint again, and repeat the method just now to see if it works." Jiang Yuan rummaged through the fingerprints again.

The buddy who was clearing his throat just now couldn't help it anymore, and stood up with a "huh", but what he wanted to say changed completely: "Just now, was what we did a real case?"

"Yes." Jiang Yuan responded, and said again: "So it is a practical lecture. That... the content of what I said, the style of my lecture, can you get used to it?"

"Yes, yes, but, no, we... no, you... no, you just solved a robbery case?" The buddy who cleared his throat probably couldn't accept this.

Soon, the small lecture hall was full of voices.

Someone even quietly sent a message: Brother, come and see the gods.

(End of this chapter)