Lin Lei was dressed in civilian clothes and walked alone in the streets and alleys of Hulan County, thinking about the case over and over again in his mind.

"There are many stories in a small town,

Full of joy and joy.

If you come to a small town,

Exceptional......

The tape recorder in the street shop played Teresa Teng's "Tales of a Small Town", but the sound was loud, but it did not attract many customers.

Lin Lei stopped, took out an Ashima, and lit it.

After lightly exhaling a smoke ring, Lin Lei noticed that there were very few pedestrians on the street.

The cold wind is blowing, and the weather is already very cold in the Black Province in October.

What's colder than the weather is people's mood.

It's not dark yet, but the streets are deserted.

Because of the existence of Hu Lan Daxia, people are at home and reluctant to go to the streets.

Think about it, it is said that Hu Lan Daxia only kills policemen, so ordinary people must be fine at home, but if they go to the street and encounter a shootout, the bullet will not have eyes......

Lin Lei's heart was not cold, but he felt a little excited.

This time there is no need for evidence, only reasoning, which is very different from all previous cases.

As long as the suspect is found, you can compare your fingerprints to determine whether he is Hu Lan Daxia.

It's easy to say, but it's too hard to do.

The three major unsolved cases in the history of China, the Hulan Daxia case, the BAIYIN serial murder case and the NAN corpse shredding case are all cases of this type - the police have fingerprints or DNA, but in the vast sea of people, they just can't find the murderer!

The most difficult cases in the world to solve are not those detective cases that choose one out of three or four, but always this kind of open-ended case.

This time, Lin Lei doesn't plan to sell any "guanzi", and he must catch Hu Lanxia in the shortest possible time - because this dream doesn't know when he will wake up......

Lin Lei began to ponder the facts of the case - the police have conducted a large-scale investigation N times, but they have not found any valuable clues, what does this mean?

Is there something missing?

Lin Lei's eyes deepened, and after a long time, he snuffed out the cigarette in his hand and shook his head slowly.

No way!

If there is any omission in the police investigation of ordinary criminal cases, it is naturally possible -- but the Hu Lan Daxia case is different! This is a case of serial murder of a police officer, and the murderer is obviously challenging the authority of the police.

Of course, this refers to the social relationship aspect of the victim.

For example, those criminals who have been dealt with by the police who have been killed, as long as they are alive or not serving their sentences in prison, and have time to commit crimes, it is absolutely impossible to miss anything.

This part of the people can be excluded.

Could it be that the murderer really took revenge on society, revenge on the police, and killed the police indiscriminately?

As soon as he thought of this, Lin Lei suddenly felt an inexplicable feeling in his heart, and he always faintly felt that something was wrong.

All the facts of the case are presented in detail in front of Lin Lei, what is wrong?

Lin Lei once again sorted out the facts of the case, and his face became more and more serious.

……

Night.

Jet-black.

The family of the victim He Chang in Wanfa Town, Bayun County.

Director He was the victim of the second case, and he was shot and killed by Hu Lanxia, who rushed into the room, in the evening.

He Chang's family has other family members, but for the sake of protecting the family, his wife and children have been transferred to other places.

There is no seal attached here, after all, it is not the scene of the murder case, and the plainclothes around it only appear during the day, and there is no one to guard it at night.

Lin Lei hid alone behind a telephone pole fifty meters in front of Director He's house, motionless and observing the surrounding situation.

Where Lin Lei found the "wrong" is here!

That's right, the second case victim He Chang's family!

Director He is the director of a police station in Bayun County, and the murderer calls himself "Hulan Daxia" - except for the case of Director He's murder, all the cases occurred in Hulan County.

That's the big difference!

The place of the crime, different!

Why?

Why did Hu Lan Daxia go to Bayun County to commit crimes?

Isn't he Hu Lan Daxia?

The murderer left a note on the wall, claiming to have killed enough 100 policemen in Hulan County, and ran to Bayun County to kill a director, why?!!!

Lin Lei had a strong premonition in his heart, just like Lin Lei's favorite sentence, "If something goes wrong, there must be a demon"!

At this time, a sound of footsteps came to Lin Lei's ears!

Lin Lei looked at it, and it turned out that a team of security patrolmen had patrolled the street.

With Lin Lei's latent skills, those security patrol members only saw a telephone pole from beginning to end, nothing more.

Lin Lei avoided them not for anything else, but he didn't want to alarm anyone, he needed to investigate separately.

Because Lin Lei knows very well that no one should easily rule out his suspicion - maybe Hu Lan Daxia is a member of the public security joint defense team, and that is not impossible.

And Lin Lei still has an idea in his heart, but he can't say it.

There are many things to think about in this world, but not many things to say.

Thirty years ago – even thirty years from now, it would have been better not to preconceive about a certain category of people in a case like this.

Such a person is naturally a person with the same identity as the victim.

This kind of thing, Lin Lei is not sure, so he can't talk nonsense.

The time had come to the second half of the night, and Lin Lei seemed to be one with the telephone pole in front of him, and no matter from any angle, he couldn't see that there was a person lurking here.

Lin Lei was very sure that there was no one in Director He's house to watch.

Lin Lei moved......

With a distance of fifty meters and a two-meter-high courtyard wall, it took Lin Lei a total of twenty-five seconds before the person appeared in the courtyard of Director He's house.

With just a quick glance, Lin Lei saw the layout of this place, which was a courtyard similar to the courtyard of the imperial capital.

The yard gate is on the south side, the bedroom is on the north side, the kitchen is on the east side, and the toilet and utility room are on the west side.

The difference between the murder case of Director He and the previous and subsequent cases is that he was killed in person.

Hu Lan Daxia did not choose to sneak into the room in the middle of the night to kill people, but chose to directly enter the scene in the evening to shoot and kill, which is really a fun thing.

Why?

Committing a crime in the middle of the night is definitely much less risky, why should the murderer choose a high-risk person to kill in person!

The facts also proved that Hu Lan Daxia was almost about to be planted at that time, because in addition to Director He, there was also the principal of the primary school in the room. And if that principal hadn't been too bad at marksmanship, I'm afraid Hulan Daxia would already be a dead corpse......

If something goes wrong, there must be a demon!

Lin Lei tiptoed to the door of Director He's bedroom, and couldn't help but be stunned for a moment!

I see!

So that's it!

This bedroom door turned out to be an iron door!

And the door frame is also iron!

A smile appeared on the corner of Lin Lei's mouth!

It's not that Hu Lan doesn't want to break in in the middle of the night, it's that he just -

Can't get in!!