1995, Starting as a Criminal Investigation Expert

Chapter 117 Kiss Li Shu for Me (Seeking First Subscription)

The Muxiyuan Bus Station is located in the southern part of the city, near the Third Ring Road.

A convoy of police cars pulled up, and a large group of people got out.

Li Shu arrived and joined the others in surrounding Liu Xinfeng.

Geng Zheng also came; he had done the probability model and knew the situation best.

"We first assigned different weights to different modes of transportation."

When traveling from other cities to Beijing, you either need to drive or take public transportation.

As for the former, there are only three types: bicycles, motorcycles, and cars.

If it's a bicycle, considering the distance, the probability is the lowest.

Then there are cars.

The suspect had a clear motive: burglary.

He's short of money.

If, in the later stages of the crime, he stole hundreds of thousands of dollars and might still have the opportunity to buy a car, then in the early stages of the crime, he certainly didn't have a car.

Therefore, the motorcycle is the most likely.

Then there's public transportation. Some surrounding counties and cities don't yet have direct railway connections, so different weights should be given to these areas.

After careful analysis by Yang Shaoting and his team, they assigned the highest weight to intercity long-distance buses.

"Then, based on the route, we assign different weights to each route based on its convenience, frequency of service, and whether a transfer is required."

"Then, using the distance decay and other model algorithms proposed by Li Shu, we perform tree path analysis, extend it to the crime scene, form the final probability model, and perform calculations."

Geng Zheng tried his best to explain in the simplest and most understandable language.

Judging from Liu Xinfeng's reaction, he probably just listened to the excitement and couldn't understand the specific principles behind it.

Geng Zheng continued, "We even considered environmental factors at important transportation hubs. For example, in Muxiyuan, we considered the incidence of bicycle thefts and the degree of disorder in the security environment."

The suspect arrived in Angyeong by bus, so he immediately needed transportation.

Therefore, whether it is convenient to steal bicycles near the station can also be included as a weighting factor in the model.

There's also the security environment.

From Muyuan southwards to Dahongmen, this area is the most densely populated area of ​​migrant workers, with a very poor security environment, making it more conducive for suspects to hide.

"We have conducted targeted analyses of the city's five passenger transport stations and numerous minibus stops, taking specific measures for each situation. You are like Zhao Gongkou, which is not far away."

He pointed northeast and said, "We investigated and found that the passenger routes at Zhaogongkou and Muxiyuan are quite different, which will affect the final analysis."

Geng Zheng wanted to keep it simple, but once he started talking, he habitually went into detail and explained everything thoroughly.

He talked at length about how the initial cases were more valuable for research because the suspects started from the most familiar areas and then ventured into unfamiliar areas to commit crimes.

In the last case, the suspect got off the bus after only two stops when he fled, which also pointed to something.

"After final analysis, among the traffic nodes, Muxiyuan in front of us has the highest probability, and from that, we can deduce that Langfang Anci District has the highest probability."

Geng Zheng pointed to the bus station across the street.

Liu Xinfeng nodded repeatedly and even joked, "Although I don't understand this, I think it's calculated mathematically, so it must be scientifically sound. Don't you agree?"

This statement, to some extent, can be considered an endorsement of the probability model developed by Geng Zheng.

It's definitely more valuable for reference than just randomly drawing a few circles on a map.

"Muxiyuan".

Liu Xinfeng frowned slightly and said, "Shaoting, this bus station should be an important location for your stakeout, right?"

Yang Shaoting nodded.

Muyuan is the largest passenger station in the city, so it is naturally a key target for surveillance.

"Then let's split into two groups."

Liu Xinfeng pondered for a moment and said, "For the first route, we will prioritize screening out eligible men in Langfang from the information we have previously checked. We will find them and collect their fingerprints for comparison. Li Shu will be in charge of this part."

He turned his head and glanced at Li Shu.

When it comes to determining the identity of fingerprints, no one has more authority than Li Shu.

"Then, for the second route, Shaoting, you take your men to Langfang. I will coordinate with the Hebei Provincial Department to cooperate. Let's start the investigation from Anci."

"First check the people in the registration information, then expand the scope, and then issue reward notices, broadcast on television and radio, and expand the scope to the surrounding counties and cities of Anci."

"We're offering a 100,000 yuan reward for any clues. We have the fingerprints, so we're not afraid of alerting the suspect. No matter what, even if we have to search the entire corridor, we have to find this person."

Liu Xinfeng knew very well that the case had been solved to this point and could not be delayed any longer.

Once the plan was set, the two groups immediately began to move out.

The municipal bureau immediately began screening personnel.

Langfang is too close to Anjing. Anci, being a city center, is only fifty or sixty kilometers away from Anjing.

For people from Langfang, going to Anjing is more convenient than going to the provincial capital.

Therefore, there is a large flow of people between the two cities.

However, we are only considering Anci District for now, and there are many ways to get to Beijing. After filtering, from the start of our surveillance to the most recent time, over the past ten months, there have been 5728 eligible men who traveled from Anci to Muxiyuan by long-distance bus, after removing duplicates.

people.

Upon learning this number, Wang Ze'an couldn't help but gasp, saying, "I originally thought that narrowing the scope to Langfang Anci was precise enough, but now I realize that the number is still quite large."

Collecting fingerprints from nearly six thousand people and then comparing them is no easy task.

Li Shuxin thought that was already too little.

Anci District has a registered population of 630,000. Expanding the age range to include men aged 20 to 50, there are at least 200,000 of them.

Compared to other things, less than six thousand is really not much.

"Captain Chen, I have an idea."

Li Shu looked at the man opposite him.

Chen Tianyi is the deputy captain of the Major Crimes Team under the Anjing Criminal Investigation Department. He came today to deliver registration materials.

Li Shudao said, "I think we can do another round of screening on this list."

Seeing that everyone was looking at him, Li said, "The stakeout and inspection started in mid-January, and then we celebrated the New Year on January 31st."

"The first case after the Lunar New Year, which is case number 36, occurred on February 25. According to Director Yang's analysis, assuming that the suspect's identity information was checked by us, he was not discovered simply because he was well disguised."

"So if I were a suspect and managed to escape inspection, I would definitely change my modus operandi and use a different mode of transportation if I were to commit another crime."

Chen Tianyi reacted quickly and immediately understood what Li Shu meant, saying, "Li Shu, you mean we should investigate the Anci people between mid-January and February 25th?"

Li Shu nodded hurriedly, that's exactly what I meant.

The others present also realized what was happening, and Wang Ze'an hurriedly grabbed the registration form and flipped through it.

He quickly flipped to the page, did a quick count, and exclaimed in surprise, "Only 32 pages, less than 640 people. And if we analyze it this way, it could be even fewer. Just check the people from the days before the 25th."

Chen Tianyi took the registration form, quickly flipped through it, and hurriedly asked where the phone number was.

Yang Shaoting has already led his men to Langfang; he needs to report the situation as soon as possible.

When the call was made and the situation was explained, Yang Shaoting on the other end was stunned for a moment, then exclaimed in surprise, "Good lad, you're quick-witted!"

It turned out that Yang Shaoting had also thought of this after arriving at Langfang.

After all, he was the one who first analyzed the situation and concluded that the previous stakeout and inspection might have uncovered the suspect.

Wait for my news.

Yang Shaoting hung up the phone. Regardless of the specifics of the investigation, Li Shu was still waiting for the fingerprints he had collected.

For a case of this caliber, the Langfang Municipal Public Security Bureau will naturally provide full cooperation.

Yang Shaoting rushed over yesterday.

Today, not only were local personnel from Langfang coordinated in place, but technical personnel from nearby counties and cities also arrived to provide support.

Fingerprint collection still requires the operation of professional technicians.

When Chen Tianyi called, all sorts of people had already set off.

Yang Shaoting was stationed at the Langfang Municipal Bureau to direct operations.

On the one hand, fingerprints were collected based on the list; on the other hand, all police officers in the city were mobilized to post suspect portraits and offer rewards.

Around noon, television and radio stations began broadcasting the reward information.

Tomorrow, all the newspapers in Langfang will publish a reward notice on their front page.

One hundred thousand!

With a monthly salary of only three or four hundred, this 100,000 yuan reward could buy a big house in the city.

As a result, the reward hotline was overwhelmed with calls that afternoon as soon as the reward was offered.

All sorts of reports and complaints came in.

Yang Shaoting has already arranged for people from the Langfang Municipal Bureau to screen all the reported information.

Around 7 or 8 p.m. that evening, the people who had their fingerprints taken returned one after another.

"Director Yang, the progress is a bit slow," one of his subordinates said.

A total of 126 technical personnel were organized from various regions, with two people accompanying them and three people forming a group.

We gathered all the necessary materials and vehicles for fingerprint collection, and then, according to the list and designated areas, we traveled all over the city.

There were instances where the person could not be found on the spot. In the end, a total of 463 fingerprints were collected throughout the day.

It sounds like a lot, but considering the list of nearly 6,000 people and the district's registered population of 630,000, this number is still too small.

"Never mind, take it slow."

Yang Shaoting immediately arranged for someone to drive all the collected fingerprint cards to a hospital.

To improve efficiency, samples are collected and compared on the same day. Li Shuke is still waiting at the institute.

Two hours later, the first batch of 463 fingerprint cards was delivered to a school.

Tan Ligang, Wang Zean, and others also volunteered to work overtime, and immediately got busy as soon as the fingerprint cards arrived.

Someone was in charge of scanning, while Li Shu and others first unpacked the fingerprint cards to check the collection status of the fingerprint cards, whether there were any smudges or blurry fingerprints.

Li Shu looked at each one; the fingerprints were in good condition.

We brought in professional technicians and specifically requested that the data be collected clearly.

This batch of fingerprints belongs to people on the verification list from January to February.

Li Shu was reading for a while when he suddenly stopped.

Although I only glanced at it a few times.

Having handled numerous cases and compared countless complex fingerprints, Li Shu's ability to observe fingerprints may not have reached the level described in the system—a talent level where one can distinguish fingerprints at a glance—but it is certainly not bad.

Li Shu had a strong intuition that there was something wrong with the fingerprint card in his hand.

very similar!

Li Shushun picked up a magnifying glass from the side and looked closely.

Li Shu had been working on this set of fingerprints for so many days, and he had memorized the features of the fingers by heart.

"What's wrong, Li Shu? Is there a problem?"

Wang Ze'an, who was standing nearby, immediately noticed Li Shu's reaction and asked him urgently.

Li Shu didn't reply. His gaze followed the magnifying glass, scanning every fingerprint on the card. He had already quickly processed all the features in his mind.

Just a few seconds later, Li Shu looked up.

Tan Ligang and the others present had already noticed the situation and turned to look over.

"I----"

Li Shu opened his mouth and only managed to utter the word "I" before his throat was choked by an inexplicable emotion, rendering him speechless and mute.

My mind is buzzing; there's surprise and excitement.

Unable to speak, Li Shu nodded vigorously and shook the fingerprint card in his hand.

"Holy shit!"

Wang Ze'an exclaimed in surprise, quickly snatched the fingerprint card, and examined it closely.

The remaining people immediately surrounded them.

"No way, it already... matched?"

"Don't misread it."

"Li Shu, are you sure?"

Everyone was talking at once, extremely anxious.

Tan Ligang snatched the fingerprint card and examined it closely with a magnifying glass.

It looks just like it, it really does.

He quickly looked for distinctive features.

After spending some time with Li Shu, he really learned a lot, such as rapid localization and the topological relationships of feature points.

The more I watch, the more excited I get.

Li Shu calmed down a bit and finally spoke, clenching his fist and saying, "There's no mistake, it's him!"

found it.

We've finally found this beast in human skin.

Wang Ze'an hurriedly snatched the fingerprint card, flipped it over to look at the information: "Ma Hongyan, his name is Ma Hongyan, unit 7, Guangming Community, Aimin West Road, Anci District, 202."

He read the address aloud, as if he wanted to memorize it.

Tan Ligang snapped out of his daze and subconsciously wanted to ask Li Shu if he could be sure, but he swallowed the words back.

Given Li Shu's skill level, it's impossible for him to make a mistake.

He saw it himself, so it should be true.

"I call."

Tan Ligang hurriedly got up and called Yang Shaoting.

It's almost midnight.

However, Yang Shaoting, who was far away in Langfang, had not yet rested. He was having a meeting with everyone to summarize today's work experience and see if there were any ways to optimize the process and improve collection efficiency.

At that moment, someone rushed in and gave a phone call from a certain school.

Yang Shaoting was suddenly stunned.

By now, the fingerprint card should have been delivered to one of the institutions.

Then suddenly a call comes in, either there's a problem somewhere, or the match has been found.

With a whoosh.

Yang Shaoting took off running outside, grabbed the phone, and anxiously asked what was going on.

"Director Yang, it matches! It matches!"

Tan Ligang shouted loudly, "His name is Ma Hongyan, Ma Hongyan, the 'Hong' of 'red' and the 'Yan' of 'beautiful,' he lives in Guangming Community, it's him, Li Shu confirmed it, it's him!"

In that instant, as Yang Shaoting gripped the receiver tightly, his mind went blank.

Only one voice kept echoing.

The match is there, we've found the person!

After confirming the name and address again, Yang Shaoting excitedly blurted out, "Give Li Shu a kiss for me, I fucking love him to death."

He hung up the phone and rushed to the conference room.

"What are you all looking at me for? Let's go, arrest them!"

We can't let this beast see tomorrow's sun.

The convoy roared out of Langfang City Bureau. Guangming Community is located in the city center and is a residential community built in 93.

I checked the registration information form again on the way.

On the afternoon of February 24th, Ma Hongyan took a long-distance bus and arrived at Muyuan Bus Station, where her ID card was checked.

Because he was close to the 25th, he was on the first list of people to have their fingerprints taken today.

When we arrived at the location, the lights in room 202 were still on.

Yang Shaoting quickly made several hand gestures, and the people dispersed to guard the vicinity.

He himself gave a shout and led the way into the building.

He's a deputy director, and he hasn't been on the front lines for a long time, but today he insisted on personally leading the team to charge.

202!

It was an iron gate with a security lock; otherwise, the impatient Yang Shaoting would have just kicked it down.

They knocked loudly on the door.

"Who is it!"

A man's voice came from inside the house.

Soon, the door opened.

The moment the door opened, Yang Shaoting had already rushed it open.

Everyone rushed forward.

Wearing only a thin layer of clothing, Ma Hongyan was pinned to the ground and killed before she could even see who it was.

The dark muzzle of a gun was already pressed against his head.

"Ma Hongyan, you're under arrest!" Yang Shaoting shouted.

He had waited two whole years for these words.

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