National Forensic Doctor
Chapter 190 - 190 182 This move is useful

190: Chapter 182 This move is useful 190: Chapter 182 This move is useful Jiang Fuzhen received Jiang Yuan’s message while he was sipping on Duck Shit Aroma Phoenix Single Cluster and scrolling through his phone.

With a nimble reply of “Okay,” Jiang Fuzhen fell into deep thought.

“What are you thinking about?” Uncle San asked from across the table, took a sip of tea, teased the Hupo Xue Earth Dog at his feet, and kept Jiang Fuzhen’s two dogs a bit further away.

The Doberman was only a few months old but it had already surpassed his Hupo Xue Earth Dog in size, the two together gave off a vibe daring anyone to mess with Uncle San.

Jiang Fuzhen let out a “hmmph,” put down his phone, and began to brew tea, saying, “Xiao Yuan has to work overtime again.”

“Working overtime again?

Even civil servants are this busy?” Uncle San slurped his tea.

“He says there’s a case,” replied Jiang Fuzhen, shaking his head helplessly.

“It looks like a second-class merit isn’t easy to get.

Others work 8 hours a day, and some go home after just four or five hours.

Jiang Yuan works for 10 hours; if they don’t give it to him, who else would they give it to?”

Mrs.

Hua agreed, “Xiao Yuan really works too hard.

Actually, it would be better for him to come back and start a business, just open a company to help everyone find things…”

“Help you find things, you mean,” Uncle San couldn’t help but say, “What’s the use of buying a safe if you need to keep it locked, but you leave it open all day long?”

Mrs.

Hua complained, “Opening a safe is really tiring, you know.

The door is so heavy, pushing it is okay, but pulling it, I practically have to slide on the floor.

Then I have to enter the password, look at the iris.

I put my eye up to it, and it still often doesn’t recognize it.

Might as well think of it as a filing cabinet…”

“Ah Hua, you have abalone, right?

I remember,” Jiang Fuzhen said.

“Right, I bought a lot of dried abalone back then.

They’re too troublesome to prepare, and there’s no one at home who likes them…”

“Give me some, I’ll stew some abalone for Xiao Yuan to nourish him,” Jiang Fuzhen decided, getting up.

Mrs.

Hua stood up too, “Exactly, Xiao Yuan doesn’t have a partner yet, and he works so hard.

He definitely needs to nourish himself well.

I also have dried scallops and Jinhua Ham.

Wait a moment, I’ll have someone push them over.”

“Send me the amount on WeChat afterward,” Jiang Fuzhen lifted up his phone.

“Okay,” Mrs.

Hua didn’t stand on ceremony and asked, “How much are you going to cook?”

“I’ll cook a whole pot, get about four or five pounds,” Jiang Fuzhen said as he began messaging to order old hens, dragon bone spareribs, chicken feet, pork trotters, and the like.

Dried abalone is complicated to prepare.

Apart from being careful during the soaking process, braising it is also laborious and consumes time, fire, and ingredients.

A pound of abalone almost needs ten pounds of other ingredients to braise, and without several days’ work, it’s not easy to get it right.

However, Jiang Fuzhen estimated that Jiang Yuan would be away for a few days before he could return home, just in time to eat the stewed abalone.

…

The Criminal Police Brigade.

Jiang Yuan rubbed his back, stared at the screen, thinking, and then went back to marking and operating on it.

Most of the time, Jiang Yuan focused on the fingerprint image and pondered it.

The fingerprint was small, but there were actually many points to consider.

Especially with such high levels of fragmentation and fuzziness, he had to assess the direction of the ridges, the width of the fingerprint lines, the areas where minutiae appeared, and the number of minutiae.

It must be said that the advent of the Automatic Fingerprint Identification System (AFIS) greatly reduced the work involved in fingerprint comparison.

However, talking to the AFIS became a complex task.

Sometimes, even if you separate the wheat from the chaff, extracting the most quintessential and true fingerprint, you still can’t find a match.

That’s because the fingerprints in the database are not necessarily the most quintessential and true.

Sometimes, to find a match, what’s needed is actually impurities.

So, talking with the program is just like talking with a person.

The initial communication and confrontation all tangled around one question: are you quintessence or dross?

After identifying the other’s nature, the correct approach to further deepen communication is to treat quintessence in the way of quintessence and dross in the way of dross.

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

You are dross.

He said it directly, facing the computer screen.

The bloodstained fingerprint on the screen at that moment was as calm as an elite, silent.

“Let’s talk about this tomorrow,” Jiang Yuan said, tapping the bloodstained fingerprint with his finger before he left the office and headed to the dormitory to rest.

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

Recently, he had been looking at too many cases.

What if he encountered an ex-convict killer, a retired assassin, or a murderer intent on silencing others?

That would be terrible.

Especially on the eve of cracking a murder case, choosing to walk alone at night was almost a guaranteed death sentence in movies and TV shows.

Even if he didn’t die, he would likely be injured and unconscious for a long time, and if really unlucky, he might be left to smile at life in the light of day after being handicapped.

Jiang Yuan returned to his dormitory, locked the door, and then he could sleep in peace.

The next day.

The sun was shining brightly.

Jiang Yuan purposefully slept until everyone was already at work before getting up to wash up and then headed to the office with the rest.

Wu Jun arrived on his heels and clapped him on the shoulder with a smile, saying, “I prayed for this hand before I left the house to bring you some good luck.”

“Thank you, Master,” Jiang Yuan thanked him.

“How’s it going?

Any hope?” Wu Jun, who was knowledgeable in the field, had seen many cases where fingerprints could not be identified after a long time.

He didn’t want to add pressure on Jiang Yuan either.

Jiang Yuan nodded and said, “It’s going quite smoothly.”

He felt that if today’s pace was good, there was a chance of capturing the fingerprint in question.

This confidence was built up through numerous successful matches in the provincial fingerprint competition.

Of course, even with confidence, it was still better not to blurt it out too carelessly.

As soon as Jiang Yuan returned to his seat, he silently began adjusting the fingerprints.

The old high-performance server roared to life again.

This time, he treated the fingerprint in question with the mindset one reserves for dealing with impurities.

After a series of operations, when Jiang Yuan sent the inquiry again, he directly selected the Plane Impression Library for the fingerprint’s target data category, unchecking the “Rolled and Plane,” “Rolled, Plane, and Palm” and other databases.

The so-called rolled, refers to rolled impressions, also known as three-sided impressions.

To elaborate, it is a rather advanced method of impression taking, with quite a complex operation.

During the impression process, the person being fingerprinted needs to stand facing the impression table, while the impression officer stands to their left, using their right thumb and forefinger to pinch both sides of the second joint of the fingerprinted finger.

The other fingers and the palm control the whole hand of the person being fingerprinted, then roll it around the impression officer as the center following the direction of thumb inwards and other fingers outwards…

In a nutshell, the responsibility for rolled impressions is usually on a dedicated fingerprinting officer, often a police officer.

The advantage of this is to capture all the details of the finger.

This includes the inner patterns of the finger ridges, the periphery line system, root chisel line system, deltas, and so on…

Theoretically, any part of the fingerprint that this person leaves behind in the future can be compared to a three-sided impression.

Thus, rolled impressions greatly enrich the fingerprint database.

Unless…

Unless the fingerprinting officer is unprofessional.

As everyone knows, people can do unprofessional things.

And the task of three-sided fingerprinting does have some difficulties.

Although one could grasp the essentials after earnest training and fingerprinting just a few dozen fingers.

But, as everyone knows, people can be unserious, too.

Jiang Yuan faced too few fingerprints, which meant a very low margin for error.

By comparison, plain impressions were much simpler.

They are what people normally understand by pressing a finger.

You dip your finger in ink and press it vertically onto a fingerprint card.

Although the recorded fingerprint is not complete, the fingerprints Jiang Yuan now had all fell within the range of plain impressions.

Impurity against impurity, there’s nothing to be ashamed of.

Jiang Yuan re-adjusted the characteristic points of the fingerprint, singled out the plain impression library, and started comparing.

After two rounds of comparisons, and by noon, as Jiang Yuan was scanning the third round of characteristic points, the fingerprint ranked 12th made him stop.

Jiang Yuan took a sip of tea and then enlarged both fingerprint images to check them one by one.

There was no doubt about the match!

Indeed, when he singled out the plain impression library, the matching of the fingerprint suddenly became much easier.

Jiang Yuan breathed a sigh of relief.

In fact, this fingerprint was even more difficult than the ones during the fingerprint competition.

During the competition, he had used image enhancement skills, which amounted to a dimensionality reduction assault on the trace examiners of the previous generations.

This time, the fingerprint comparison involved somewhat of a direct confrontation.

However, where is a murder backlog case ever easy?

Jiang Yuan chose to submit it to the fingerprint database and before long, feedback was sent back.

Confirmed as identical!

Jiang Yuan stood up and stretched, his bones cracking, and picking up his phone, he casually said to Wu Jun, “It’s a match.”

“Eh, really?” Wu Jun exclaimed in surprise.

Jiang Yuan nodded, “I’m going to call Captain Huang.”

“Huang must be thrilled,” Wu Jun remarked, then glanced at his right hand and began to ponder with focus, thinking: Is this method really that effective?