It was 2:30 in the morning.

Two security officers in charge of security in the police station were patrolling the top floor with flashlights.

The two walked to the stairwell in front of the top door, swept around with the flashlight, and found nothing unusual, so they prepared to go downstairs.

"Did you hear any noise?" a young police officer suddenly asked.

The other was stunned, "What's the sound?"

“Hohu…”

"Sound the wind..." The policeman was shocked, "Stop guessing, have you seen the SCI lights on downstairs? Go downstairs quickly. Who knows what will run out of Gongsun's forensic room?"

"But the sound seemed to be coming from outside." The little policeman pointed to the iron gate on the top floor that was hidden.

The two of them looked at each other, walked to the door tremblingly, listened with a slight ear, and sure enough... they heard a burst of "whistling" wind coming from outside.

"What sound?"

"Do you want to go and have a look?"

The two looked at each other. It was midnight, and there was only a tarmac on the top of the police station. There should be nothing strange, right? But the door was locked, so why did it open?

"I'm a little scared." The policeman held the flashlight and pressed the gun around his waist.

Another opened the door, "Maybe it was the wind, it seemed to be coming from the direction of the apron."

The two of them walked carefully to the steps, and looked towards the apron... and saw a white shadow standing in the center of the empty roof, holding a black wooden knife in their hand, practicing the knife. The sound of the wind... was the sound of the wooden knife swinging.

The two little policemen blinked and looked at each other silently - looking at the white outfit and looking at the figure, it must be Bai Yutang, what was the matter in the middle of the night...

The two were wondering, and heard a voice coming from behind, "What are you doing?"

When the two turned around, they saw a blue face.

"Wow!"

The two screamed and sat on the steps... Looking again, they saw Zhan Zhao holding a flashlight in his hand, smiling at them in his face.

The two little police officers hiccupped and pointed at Zhan Zhao, "Dr. Zhan, you are so scary!"

At this moment, another voice came from behind, "How is it?"

When the two turned around, they saw Bai Yutang standing behind them, holding a knife in one hand and a white towel in the other hand, wiping sweat.

Zhan Zhao nodded, "I found it."

"So fast? I thought I was going to check until dawn." Bai Yutang jumped down.

The two young police officers saw him jumping off his head, landing next to Zhan Zhao, and walked back with him.

"I originally expected Jiang Ping to find out the speed alone until dawn." Zhan Zhao spread his hands, "He asked Mia for help, and the two of them worked together to cut the time halfway."

Bai Yutang nodded, "This is pretty good."

The two little policemen looked back at the distance between the steps behind them, speechless, would a normal person jump like this...

The two stood up with flashlights and followed Zhan Zhao and Bai Yutang downstairs.

Zhan Zhao turned around and waved to them.

The two were quite happy. Dr. Zhan was so kind that he was about to close the door just after going out, but who knew what was caught by the door.

The two jumped in shock and turned around and saw two people appear behind them.

Zhao Hu walked in yawning, behind him was Ma Han who was closing the door casually.

The two little police officers moved to the side consciously, okay, these two old men didn't even sound when they walked...

After going downstairs, two young police officers passed by the door of the SCI office, looked inside, and gasped.

I saw that the ground and the table were covered with various information. Xiao Baichi was flipping through books in the pile of information. Three white boards lined up behind him, and various photos of the corpse on the board. Gongsun Zheng sat cross-legged on the table, looking at the photos.

The two policemen ran away quickly - the SCI floor was so abnormal no matter how many times they came.

...

Bai Yutang was originally analyzing the case with Zhan Zhao and the others, so why did he run upstairs to practice swords? Because after the case analysis was over, Zhan Zhao came up with a solution, so the investigation entered a massive data analysis stage, and everyone needed time to wait.

...

Time goes back a little.

After sorting out all the information obtained from Karin, Zhan Zhao and others confirmed that this series of seemingly "accidental" murders were actually a series of serial murders. The deceased's neck was stuffed with "undead needles" to mean revenge. And after investigation, these deceased may have committed serious crimes during their lifetime, but escaped legal sanctions.

Therefore, it is initially inferred that this murderer is a type that often appears among serial killers - the Punisher.

Of course, it was just a preliminary inference, and the key clue to finding the punishment was the black butterfly, and the "God of Death" who seemed to be following the butterfly at the funeral of the deceased.

However, all this is illusory and it is difficult to find clues for a while.

So here we use the behavioral analysis that Zhan Zhao is good at.

From the large number of clues collected by Karin, Zhan Zhao inferred that an image... was not the image of the murderer, but the image of the next victim!

The recent case should be the murder case in Baiou Park, which also means that the murderer has been committing the crime. It is difficult to infer the time of the next case, and it may happen at any time.

But there is a premise here: how did the murderer find so many murderers who escaped the French Open? Is there any way to get in touch with such a large amount of data and eliminate some of them that may be a chance to learn about it, so in general, there must be a common source of information.

Jiang Ping focused on searching the source of relevant information, but found that most of the information had no relevant reports. So, the channel for the murderer to obtain data was not through the Internet?

But since Bai Chi has read a large number of newspapers and other written materials through the Internet, he has not found any reports on these unfounded cases. So where did the murderer learn about these cases?

After seeing the large number of search results of Jiang Ping and Bai Chi's return without success, Zhan Zhao nodded with satisfaction and said that there is no clue, it is a major clue!

Everyone was unsolved.

"If a person has committed a serious crime such as killing a person, then this crime is undoubtedly the biggest secret in his life!" Zhan Zhao hugged his arm and began his own analysis, "Who can understand a person's secrets most clearly?"

While everyone frowned, Zhan Zhao had already given the answer, "Of course it's me!"

Everyone nodded according to Zhan Zhao's thoughts. Indeed, they knew their secrets.

Bai Yutang thought for a while, "So, were those people telling the murderer their secret?"

"Who is the murderer? So many people told him the secret... Could it be a priest or something?" Bai Chi was puzzled.

Gongsun shook his head, "Not everyone in the deceased believe in religion, and some of them do not look like they can repent!"

"Not a pastor, not a psychologist! It's not a volunteer priest, God Mumaria." Zhan Zhao smiled and ruled out all possibilities, "Who will a person, for better or worse, tell his secrets and sins?

Everyone looked at each other again.

Luo Tian asked, "Spouse?"

Everyone shook their heads, and there were too many people who were hiding from their other half...

Zhan Zhao once again gave the answer, "I."

Everyone was stunned, "I?"

Bai Yutang frowned, "Do you tell yourself?"

The rest of SCI also tilted their heads and looked at Zhan Zhao with the expression of a little Teddy waiting for instructions in a circus.

In the lounge, Zhao Jue, who came to join in the fun, saw this scene, hugged the book and smiled on the sofa, his shoulders trembled, and he pounded the sofa cushion, "So stupid, hahaha..."

Everyone looked at Zhao Jue resentfully.

Bai Yutang seemed to have thought of a possibility and asked Zhan Zhao uncertainly, "Are you talking about... search?"

Zhan Zhao clapped his hands - right!

"Search?" Bai Chi didn't understand why he couldn't understand such a high IQ.

Bai Yutang said, "Only the secret that he knows is unknown to others, so he will repeatedly determine whether this matter is known by himself."

Everyone thought about it, and it seemed that something was about to come out.

Zhan Zhao smiled, "Humans have certain commonalities. They are roughly close to their attitudes towards things that cannot be erased, caring and escaping! The situation of escape is to deliberately avoid them, but escaping is unrealistic. If you have killed someone, it does not mean that you can forget them and never killed them. These dead people later lived a relatively normal life, so the shadows of the past will make them even more resentful. As time goes by, they will repeatedly determine that only they know the secret, but no one else knows it, can continue to live with peace of mind. So, they go back to search for the incident that happened regularly."

Everyone understood what Zhan Zhao meant.

Xiao Baichi clapped his hands, "That is to say, as long as the murderer determines some incidents and masters certain computer technology, he can monitor whether someone is searching for this case according to a certain rule and thus selecting the victim!"

Zhan Zhao nodded.

Zhao Hu frowned and pulled Ma Han aside, "I seem to understand that it seems a little stuck. You can analyze it in Chinese again."

Ma Han looked at Bai Yutang, and that meant that - you are the only one who can speak human language here, it depends on you.

Bai Yutang thought for a while and said, "For example, an accidental death occurred three years ago. Someone might search at that time, but a year later, basically everyone will forget this case, and no one will remember this case after three years... If there are still people searching for this case regularly in five or six years, then there are only two possibilities, the person or murderer of the deceased. Excluding the relevant person, the possibility of the remaining murderer is very high, so just conduct a brief investigation..."

"oh!"

This time, all SCI members understood.

"No wonder the cases seem to be delayed!" Luo Tiandao, "The deceased committed crimes many years ago, but N years later received the so-called retribution. It turned out that this method was used to audition victims!"

Jiang Ping said, "People who can do this kind of surveillance should have certain skills. How should they find it?"

"Since he's waiting for the rabbit." Zhan Zhao blinked, "We can catch the rabbit like him."

Jiang Ping suddenly realized, "Ah! We can use the same method to find his next prey!"

Zhan Zhao nodded, "Maybe he could help break the unsolved case of the machine pile, seek justice for the deceased, or something."

Gongsun also agreed, "This is indeed a very feasible method! Although the deceased are victims, if the crimes they committed back then are true, then they should indeed be punished by law."

"But there may be more than one victim found like this!" Luo Tian reminded.

Zhan Zhao nodded, "So you should filter first, and then we will choose again after the audition. Finally, see who is caught!"

...

That is, after experiencing the above process, Zhan Zhao and Bai Yutang began to pass the time, while Jiang Ping entered the screening stage of big data.

Jiang Ping was too busy alone, so Zhan Zhao called Mia and after a few short conversations with Mia, the girl with amazing comprehension and intelligence began to conduct data analysis with Jiang Ping, thus shortening the complex working hours by half.
Chapter completed!