civil forensic

Chapter 183 This trick is easy to use
When Jiang Fuzhen received Jiang Yuan's message, he was drinking duck poop incense and swiping his phone.

Jiang Fuzhen replied "Yes" lightly, and then fell into deep thought.

"What are you thinking about?" The third uncle sat opposite, took a sip of tea, teased the Hubo snow dog under his feet, and kept the two dogs in Jiang Fuzhen far away by the way.

Dubin is only a few months old, and his size has already surpassed his Hubo Snow Dog. When the two are put together, there is a kind of daring to tease my uncle.

Jiang Fuzhen hummed, put down his phone and started making tea, and said, "Xiaoyuan has to work overtime again."

"Working overtime again? Civil servants are so busy." The third uncle took a sip of tea.

"He said there was a case." Jiang Fuzhen shook his head helplessly.

"It seems that second-class merit is not easy to get. Others go to work for 8 hours a day, and some go home after four or five hours. Jiang Yuan works 10 hours, and second-class merit is not given to anyone."

Aunt Hua agreed: "Xiaoyuan has really worked too hard. In fact, it's better to let him come back to start a business and start a company to help everyone find things..."

"It's to help you find something." The third uncle couldn't help but said: "You bought the safe to be closed, and it's open every day. What's the use of it."

Aunt Hua complained: "Opening the safe is very tiring. The door is so heavy that it's okay when I push it, but when I pull it, my legs rub against the ground. I have to enter the password, look at the irises, and put my eyes on it." , and often can't recognize it, I just bought a filing cabinet..."

"Ah Hua, you have abalone there, I remember." Jiang Fuzhen asked.

"That's right, I bought a lot of dried abalone back then, and it was too troublesome to simmer, and no one in my family ate it..."

"Bring me some, I'll simmer some abalone for Xiaoyuan to supplement." Jiang Fuzhen stood up resolutely.

Aunt Hua also stood up: "Damn, Xiao Yuan is not dating yet. After working so hard, he must make up for it. I still have scallops and Jinhua ham. Wait a minute, I'll find someone to push them over."

"Send a number to my WeChat." Jiang Fuzhen raised his phone.

"Okay." Aunt Hua was not polite, and asked, "How much do you want to cook?"

"Cook a pot, let's get something like four or five catties." Jiang Fuzhen said, and started sending messages, ordering old hens, keel ribs, chicken feet and pig's feet.

Dried abalone is complicated to make. In addition to being careful when sending it out, it also takes a lot of labor and fire and materials when simmering. A catty of abalone requires about 10 catties of other materials to simmer. After the whole process is completed, it takes only a few days to get it right. .

However, Jiang Fuzhen estimated that it would take several days for Jiang Yuan to go home this time, and he happened to eat the cooked abalone.

……

Criminal Police Brigade.

Jiang Yuan rubbed his waist, looked at the screen, waited for something to come to mind, and then went up to mark and operate.

Most of the time, Jiang Yuan was thinking while looking at the image of the fingerprint.

Fingerprints are small, but there are actually many points that need attention.Especially for this kind of fingerprint with high degree of incompleteness and a little fuzzy, it must be considered comprehensively according to the flow direction of the ridge line, the width of the fingerprint ridge line, the appearance area of ​​the feature point, and the number of feature points.

It should be said that the emergence of automatic fingerprint comparison system has greatly reduced the workload of fingerprint comparison.

However, the dialogue with the automatic fingerprint comparison system has become a complicated task.

Sometimes, even if you extract the most essential and authentic fingerprints, you still cannot find them.

Because the fingerprints in the fingerprint library are not necessarily the most essential and authentic.

Sometimes, if you want to compare, you need impurities instead.

Therefore, a dialogue with a program is like a dialogue with a person.

The initial exchanges and collisions were all entangled in the same question: Are you the essence or the scum?
After identifying the attributes of the other party, the correct way to communicate further or more deeply is to treat the essence as the essence and treat the slag as the slag.

After trying for an afternoon and half a night, Jiang Yuan finally made a judgment:

You are scum.

He said it directly, facing the computer screen.

The blood fingerprints on the screen were as calm as an elite at this moment, without saying a word.

"Let's talk about it tomorrow." Jiang Yuan tapped some blood fingerprints with his fingers, then left the office and went directly to the dormitory to rest.

It was too late, and he was a little afraid to go home alone.

I have seen too many cases recently. Wouldn't it be bad if I encountered a killer who was released after serving his sentence, a retired killer, or a killer who killed people and silenced them.

Especially on the night before this kind of homicide case is about to be solved, but choose to walk alone at night, this kind of film and television works is almost certain to die.Even if he does not die, he will be injured and comatose for a long time. If he is unlucky, he will have to show a sunny smile after being disabled.

Jiang Yuan returned to the dormitory, locked the door behind him, and then went to bed with peace of mind.

the next day.

sunny.

Jiang Yuan deliberately slept until the time when everyone was going to work, then got up to wash up, and then followed everyone back to the office.

Wu Jun followed him to the front and back, patted his shoulder when they met, and said with a smile: "I prayed for this hand before going out, so I will bring you some good luck."

"Thank you, Master." Jiang Yuan thanked.

"How is it doing? Is there hope?" Wu Jun is also knowledgeable. He can't do fingerprints for a long time, and he has seen a lot.For Jiang Yuan, he also didn't want to increase the pressure.

Jiang Yuan nodded and said, "It went well."

He felt that if the rhythm is good today, there is hope that the fingerprint will be taken down.This kind of self-confidence was established in the province's fingerprint competition after many comparisons.

Of course, even if you are confident, it's better not to say it out loud.

Jiang Yuan returned to his seat and silently adjusted his fingerprints.

The old high-performance mainframe roared again.

This time, he treated the fingerprint with the mentality of treating impurities.

After some operations, when Jiang Yuan sent the query again, the target data category of fingerprints directly selected the flat printing library, and clicked out the libraries such as "rolling and plane", "rolling and plane and palm print".

The so-called rolling refers to rolling printing, also known as three-sided printing.

To put it simply, this is a relatively advanced printing method, and the operation is quite complicated.

When stamping, the person to be stamped needs to stand facing the stamping table, and the stamper should stand on his left side, use his right thumb and index finger to pinch both sides of the second knuckle of the stamping finger, and control the other fingers and palm. Hold the entire hand of the stamper, and then follow the direction of the thumb box and the other fingers outward, and roll around the stamper as the center...

All in all, the person in charge of scrolling and printing is actually a special printing person, usually the police.

The advantage of this is that it can reflect all the details of the fingers.Including the internal pattern of fingerprint lines, peripheral line system, root seal line system, triangle, etc...

In theory, any part of the fingerprint left by this person in the future can be compared with the fingerprint printed on three sides.

Therefore, rolling printing is a great enrichment of the fingerprint library.unless……

Unless the printing person is not professional.

As we all know, people just do unprofessional things.

As for printing on three sides, it is still somewhat difficult.

Even if you train carefully, you can master the main points with dozens of fingers.

But, as we all know, people just don't take it seriously.

Jiang Yuan faced too few fingerprints, and the error tolerance rate was very low.

In contrast, flat stamping is simple.

It is fingerprinting as understood by normal people.

With the finger dipped in ink, press the front of the fingerprint card vertically. Although the recorded fingerprints are not complete, all the fingerprints that Jiang Yuan has obtained now are within the range of flat printing.

There is nothing embarrassing about impurity against impurity.

Jiang Yuan readjusted the feature points of the fingerprint, single-selected the flat printing library, and compared them.

After two rounds like this, at noon, when Jiang Yuan retrace the feature points of the third round, the fingerprint ranked 12th made Jiang Yuan stop.

Jiang Yuan took a sip of tea, then enlarged the two fingerprints and checked them one by one.

No doubt!

Sure enough, when the flat printing library is selected, the comparison of fingerprints suddenly becomes easier.

Jiang Yuan breathed a sigh of relief.

Speaking of it, his fingerprints were more difficult than during the fingerprint battle.

Because of the fingerprint battle, he borrowed the skills of image enhancement, which is equivalent to reducing the dimensionality and hitting the previous generation of trace inspectors.

The fingerprint comparison this time is more or less head-on.

However, in the backlog of homicide cases, there is no easy one.

Jiang Yuan chose to submit in the fingerprint database, and after a while, the feedback was sent back.

The same identification!

Jiang Yuan got up and stretched, his bones cracked, he picked up his cell phone, and said to Wu Jun by the way: "We've won the competition."

"Huh, really?" Wu Jun was surprised.

Jiang Yuan nodded: "I'll call Team Huang."

"Old Huang must be very happy." Wu Jun said, looked at his right hand again, pondered it carefully, and thought: Is this trick so easy to use?
(End of this chapter)