Qin Yongmei invited Zhou Mei to go out for a walk, but Zhou Mei refused to live or die.

In Qin Yongmei's view, as a public security officer, when you arrive in a strange city, you should seize the time to understand the local customs.

At the very least, you have to get acquainted with the local land.

It's also a professional habit.

And Mr. Zhou's professional habit is obviously behind closed doors.

Qin Yongmei walked around the street and bought some clothes, toys and other things for her little grandson.

Seeing that it was three or four o'clock in the afternoon, I returned to the hotel.

The door of the hotel was locked, and Qin Yongmei thought that Zhou Mei had gone out, so she took out the key and opened the door directly.

Opening the door caused an exclamation.

It turned out that Teacher Zhou Mei was changing clothes.

Actually, there's no fuss, everyone is a woman.

What's more, it's just showing your back.

However, this back has exposed more secrets of Teacher Zhou Mei.

Zhou Mei's back has obvious scratching marks.

In fact, when Qin Yongmei first came into contact with Zhou Mei, she vaguely felt that she had some psychological defects.

Zhou Mei has scratching marks on her left forearm.

The average person will not notice it, because many people will have such traces.

Such as tickling, being bitten by mosquitoes, etc.

But the marks of her scratching are new marks and cover old marks.

That's unusual.

Confirm the scratches on her back, and Qin Yongmei can properly give Zhou Mei, a psychologist, a psychological profile: she suffered a major blow when she was young, and she regretted it for the rest of her life. This major blow is either related to Shazhou County or the countryside where she went to the countryside.

And in life and work, she is an extremely strict person.

She is not only harsh on others, but also on herself.

There is even a serious tendency towards self-punishment and self-destruction.

Many outstanding successful people in life will have her mental disorder.

But the vast majority of people will not reach her last step.

Zhou Mei is a smart person, and she obviously knows the ability of Qin Yongmei, an expert in psychological profiling of local methods, so she hurriedly and deliberately perfunctory.

"Oops, I don't have very good skin and it itches a lot. ”

"Huh. Qin Yongmei smiled.

"yes, normal. Living in the world, who is not scarred. ”

Qin Yongmei's seemingly simple but philosophical words made Zhou Mei's eyes moist and she almost couldn't hold back.

But the BP machine on Qin Yongmei's waist suddenly sounded.

This is the Motorola man who Bai Ke matched with his mother.

It made my mother miserable.

You can pick her wherever you go.

Zhou Mei was still envious on the side: "Your big Chinese character machine is really good, you have to get four or five thousand, and your salary for two years is not enough......"

Qin Yongmei looked at the screen of the Chinese character machine, but her face changed greatly: "Grass!"

When Qin Yongmei returned to the county seat, the autopsy report came out.

She stood at the scene of the crime with the autopsy report.

From time to time, residents probe their brains in the windows and cracks in the doors.

It's a hair salon.

Wallpaper is plastered on the walls and tiles are laid on the floor.

The area is only five or six square meters.

Because it is a relatively closed space, the crime scene is even more tragic than the outdoor where Wen Jin was killed last time.

It's almost like a slaughterhouse.

There was almost no foothold on the ground, and blood splattered on all sides of the wall.

Despite this tragedy, the traces of the scene can show that the murderer was not flustered.

Even enjoyed the killing.

Although it is not very certain, from the autopsy report, it is clear that this case and the case of Wen Jin's murder should be committed by the same murderer.

The victims were all dressed in red and were stabbed in the waist and buttocks.

But this time the murderer was more calm, and he even left ** in the victim's body.

Qin Yongmei looked at the scene carefully.

The scene is so messy, the murderer should be covered in blood.

Even if the murderer was extremely confident, he could not just walk into the night.

It is likely that he changed his clothes and shoes at the scene.

Qin Yongmei took a look and found the location where the criminal was changing clothes.

It's right there at the sink.

Qin Yongmei walked over on tiptoe.

At present, Baike's non-woven fabric factory provides disposable shoe covers to the police all year round.

But Qin Yongmei didn't use it yet, and always felt that the shoes on her feet would leave traces.

When you look at the sink, you can see that the faucet has been wiped.

The criminals must have washed their hands here and carefully wiped them with something again.

Although Wu Jun has already checked it repeatedly.

But Qin Yongmei still didn't give up, and carefully inspected the sink.

It is hoped that the criminals will leave even the slightest clue.

According to Lokar's law of commutation.

A material exchange takes place at any crime scene.

No matter how careful you are, it's all inevitable.

Qin Yongmei searched the sink, imagining what it would be like for the criminal to wash his hands and change his clothes.

In my mind, that scene played out repeatedly.

After imagining it for a while, Qin Yongmei squatted down again and checked the ground.

There is no doubt that the ground has also been carefully wiped down.

But it should not be hands-on, but feet.

Anyway, there are towels in the hair salon, and the criminals step on the towels to avoid leaving footprints.

In fact, on these towels, the criminals also left clues.

For example, the soles of the feet of a person who lives in the east city are different from those in the west city.

With sophisticated scientific equipment, this exchange of substances could be discovered.

Unfortunately, this kind of research capability is not yet available.

As soon as she looked up, Qin Yongmei's head was almost hung by a hook under the sink.

It turned out that the sink was held up with a cast iron shelf.

There are several protrusions on the shelves.

When a person stands by the sink, his clothes are not kept neat, and he will be hung up a little bit.

Qin Yongmei raised her magnifying glass and carefully examined those bulges.

Sure enough, she found "clues".

A bulge has a little bit of filament on it.

As soon as Qin Yongmei stretched out her hand, Yuan Xianzhou hurriedly handed over the tweezers and the evidence bottle.

Qin Yongmei carefully took off the filaments and put them into the evidence bottle.

Then handed it to Yuan Xianzhou.

As soon as he stood up and took off his gloves, Wu Jun suddenly walked outside the door and whispered, "The landlord is back." ”

Qin Yongmei hurriedly walked out cautiously.

This hair salon is a small courtyard next to the door.

The landlord rented it to a pair of sisters in the far suburbs.

Qin Yongmei walked into the courtyard, and the slightly chubby landlord uncle looked depressed: "Comrade, I ......"

Qin Yongmei looked back, and there were still half-grown children, old and young masters watching outside the courtyard.

Wu Jun and Yuan Xianzhou raised their hands and drove away: "Go! Go! Don't be onlookers when the public security handles the case!"

Qin Yongmei also raised her hand towards the landlord and uncle, signaling that she was talking inside.

In the back room, a young girl was sitting on a chair wiping her tears.

Qin Yongmei looked at it and asked, "Are you a sister, or a sister?"

"Sister. The girl sobbed.

It turned out that my sister went back to her hometown three days ago, but she didn't expect her sister to be killed here.

Qin Yongmei beckoned the landlord and uncle to sit closer.

"You two should recall if you have noticed any strange people or things in the last few days. ”