In the office of the Criminal Investigation Unit of the County Public Security Bureau, Qin Yongmei and the others were also reuniting with their old friends.

Lao Hu retired half a year later and was hired back.

Everyone came up to hug Lao Hu.

Qin Yongmei was even more excited: "Oh, old Hu! You're back, without you, we won't have the backbone to go out to handle the case." ”

Lao Hu smiled: "Xiao Qin, you don't have to be so modest, I have heard about the case during this year's Spring Festival." You'll catch the murderer in three days. I've been a police officer for so many years, and it's the first time I've encountered such a high level of efficiency. ”

Qin Yongmei was embarrassed: "What's the matter, it's just a blind cat that ran into a dead mouse." ”

Da Lao Hei also came over and slapped Lao Hu: "Okay, old thing, stop talking nonsense." At the moment, there are already two or three major cases pressed, just waiting for you to come up with advice. ”

Everyone was giggling when someone knocked on the open door twice.

They all looked up and saw Director Lu striding in.

Director Lu looked at everyone and smiled slightly: "It is said that disasters are not one-way, and blessings are incomparable." Looks like you're going to rewrite the rules today. ”

When everyone looked at each other, Director Lu pointed behind him: "Look at it, who is this?"

As soon as he finished speaking, a familiar figure walked into the office.

"Xiao Ni!" everyone exclaimed.

Qin Yongmei walked over and punched Xiao Ni: "You stinky boy, don't say hello in advance when you come back!"

Xiao Ni smiled embarrassedly: "Didn't I just graduate? Besides, wouldn't it be nice to surprise everyone?"

"Okay!" Lao Luo and Xiao Yin shouted from the side.

It turned out that Xiao Ni studied at the Public Security University was a junior college, and he just graduated this year.

Qin Yongmei pulled Xiao Ni over and made love to everyone.

Xiao Yin's heart was straightforward: "Xiao Ni, you are now a top student in our bureau, can we still install you in this small river ditch?"

Xiao Yin just said this casually.

But Qin Yongmei and Da Lao Hei were suddenly a little embarrassed on the side.

Xiao Ni himself is an old public security officer, and now that he is back with gold plating, and he has excellent theoretical knowledge, he has to be the head of the stock.

But where does the Criminal Investigation Unit have his place?

It is impossible to take down Qin Yongmei or the head of Da Lao Hei and do it for him.

Director Lu seemed to have guessed everyone's thoughts, and laughed: "You don't have to worry about those useless hearts, and put more thoughts on the case." ”

Xiao Ni also smiled slightly: "No matter what, we can still study the case together in the future." ”

Hearing Xiao Ni say this, Qin Yongmei suddenly remembered.

Da Lao Hei is also the head of the pre-trial unit, and it is estimated that this position has already been reserved for Xiao Ni.

As long as the Pre-Trial Unit is still chaired by a former colleague, it is a good thing.

Xiao Ni greeted everyone for a while, and then left with Director Lu.

As soon as they left, Lao Hu hurriedly discussed the case with everyone.

Qin Yongmei walked over with a dossier: "The others are okay, just this case ......"

Lao Hu flipped through the file and couldn't help frowning.

Qin Yongmei sighed on the side: "Enough god, right?"

Lao Hu nodded for a long time: "If this guy really did it, he is simply a criminal genius!"

When Qin Yongmei handled the case for the first time, she handled an old case - the robbery and murder of a woolen factory.

At that time, Qin Yongmei mainly traveled with Lao Hei and a few others between the county seat and the woolen factory.

With the cooperation of the head of the woolen mill security unit, Yuan, the two criminals were finally arrested.

There is also a village called Qidingshan Village to the east of the woolen mill, which is located in a large mountain, with inconvenient transportation and inaccessible people.

Fortunately, there are several large state-owned factories such as woolen mills around it, and many farmers are able to work as temporary workers in the factories to earn some money to support their families.

Just after the Spring Festival in 1980, a villager who worked in a woolen mill was late in arriving.

This villager's name is Wang Gui, he is over 40 years old, and he has been in the woolen mill for more than ten years.

Such a good opportunity, it stands to reason that Wang Gui should be more diligent.

So, it's a bit strange not to come to work all of a sudden.

In addition, Wang Gui's current position is quite important, and he can't find a replacement for a while.

The leader asked Wang Gui, the squad leader on duty, to inquire with other villagers working in the factory.

As a result, some villagers soon told the squad leader that Wang Gui had hanged himself.

The squad leader truthfully reported to the superiors.

Although the leader felt sorry, there was nothing to question, and he planned to pass it like this.

Unexpectedly, another villager privately told the squad leader that Wang Gui was killed.

The squad leader hurriedly reported to the leader again, and the leader informed the security unit again.

So, Chief Yuan came to Qin Yongmei and them again.

Qin Yongmei took a few people to Qiding Mountain Village to investigate.

This Wang Gui is single at the moment.

He once found a wife from Qilu and gave birth to a son, and then his wife ran back to his hometown with his son, and he has been so single.

In the same village, there is a woman of the same age as Wang Gui named Liu Qiaoyan.

Wang Gui and Liu Qiaoyan are elementary school classmates, and they usually have occasional contacts.

Liu Qiaoyan got married early, her eldest daughter had already married to another village, and her younger son also went to school in the city, and she could only go home once a month or two.

Liu Qiaoyan's man is a carpenter and is also away all year round.

There is no family around each other, and a pair of lonely men and widows gradually hook up together.

Good things don't go out, and bad things go a thousand miles.

Within a few days, the village was in an uproar.

This carpenter's name is Cai Dongliang, and he is a very introverted person.

Beginner Chinese, very skillful hands, usually silent, very polite when meeting people.

But the villagers were a little afraid of him in private, and everyone said that the old man was ruthless and couldn't be provoked.

There was once a neighbor whose dog bit Cai Dongliang's daughter's leg.

This neighbor is a bit horizontal and refuses to even pay for medical expenses.

Less than a week later, his dog was poisoned.

The neighbor suspected that Cai Dongliang did it, and he scolded outside the door for three days.

A few days later, the firewood stack behind his house was lit again.

A few days later, his son was kicked off a hillside and knocked out two of his front teeth.

From then on, the neighbor was silent.

But Wang Gui's death is completely consistent with the characteristics of hanging himself. Lao Hu looked at the file and said.

"Yes," Ms. Qin said.

"I remember the first time I solved a case with you, it was when I was investigating a suicide by hanging. Dolma's mother hanged herself in her yard. At that time, you said that suicide and homicide would have different traces. ”

Da Lao Hei also interjected on the side and said: "But this case is completely consistent with the traces of hanging suicide, and we have a forensic doctor Xiao Yan." Anyway, the deceased had no family, so he cut the body into pieces, but nothing unusual was found. ”

Qin Yongmei continued: "In the end, this case can only be closed." But I didn't expect Chief Yuan to come here again a week ago!"

After Wang Gui, an employee of the woolen mill, died, the police determined that he had committed suicide.

Chief Yuan and the people in the security unit stopped pursuing this matter, and gradually forgot about it.

But half a year after Wang Gui's death, his concubine Liu Qiaoyan also died suddenly and unexpectedly.

The woolen mill suddenly seemed to have exploded, and everyone was talking about it, almost unanimously believing that Cai Dongliang was the murderer.

Qin Yongmei and the others went to Qidingshan Village again to investigate.

This Liu Qiaoyan died very strangely, but it was in line with common sense and had no flaws.

Rural households in the north have the kind of large tanks that hold water, which are generally more than a meter high.

A week ago, when Liu Qiaoyan's son, who was studying in other places, came home, he found his mother drowned in a large water tank.