Yang Zi and Haizi had already completed the search of Wang's family at this time, and for the clues in their hands, Yang Zi could already confirm that there had been large-scale bloodshed in Wang Yusheng's house.

As for the blue light reactions that he couldn't be sure about at first, he also completely remembered why there were two different reactions.

Anyone who has been killed by an external blow and has shed a lot of blood before death will inevitably leave traces of blood at the scene of the killing, and no matter how the murderer cleanses, these blood stains are not visible on the surface, but in fact they are always there.

In 1853, an organic compound called luminol was synthesized, and in 1928, when chemists experimented on it, they found that this organic compound has a wonderful characteristic, that is, it can emit blue light when it is oxidized.

A few years later, it was thought of using this characteristic of luminol to detect blood stains, and the human blood contains hemoglobin, which humans rely on to transport oxygen drawn from the air to various parts of the body.

This hemoglobin contains iron, which catalyzes the breakdown of hydrogen peroxide, turning it into water and monooxygen, which reoxidizes luminol to make it shine.

Using this extremely sensitive chemistry, it is possible to detect as little as one part per million of blood, in other words, even a small drop of blood in a large vat of water.

In fact, when the police were testing the scene of a murder, they needed to find the blood stains that the killer had tried to hide, and the main components of the reagents sprayed were hydrogen peroxide and luminol.

Using the chemistry between the two, evidence of the presence of a large amount of blood can often be quickly found, although this method of detection is also unreliable.

The principle of luminol luminescence is formed by oxidation, which also means that there are many oxides and metals that can catalyze it to cause it to emit light.

The hypochlorous acid bleach used in daily life can cause luminol to glow, and if the killer uses this bleach to clean the scene, it may interfere with the effect of luminol.

It is worth noting that the luminescence of bleach is not the same as that of human blood, in that the glow caused by bleach flashes rapidly, while the glow caused by blood stains appears gradually.

This is the only way to distinguish between the two, so that you can keenly catch any suspicious clues and successfully solve the case.

In addition, after the bloodstain is treated by luminol, it will not destroy the genetic material DNA it contains, and it can still be extracted from it for identification, which invisibly increases the success rate of solving the case.

Now it can be inferred from this alone that it has been proved that the Wang family had had a bloodshed, and it is impossible for Wang Yusheng to deny this bloodshed at all, nor can he falsely claim that it was caused by a small wound such as an inadvertent cut on his finger.

Based on this alone, he can already apply for an arrest warrant for Wang Yusheng, and after bringing it back, he only needs to explain how he killed Qiu Dafu and the dismembered body, and where he threw the remains of those corpses, and the case is over.

At this moment, a few suppressed sounds* came from Wang Yusheng's room, which made Yang Zi frown, and Hai Zi glanced at each other, and rushed over.

The door was kicked open by them, and Wang Yusheng looked frightened, sitting on the head of the bed in a daze, his eyes were very empty, and he didn't know what he was thinking.

Seeing Yang Zi and Hai Zi rushing in, he turned his head to look at them in a daze, his expression was very complicated, as if he was enduring some fierce ideological struggle.

Finally, Wang Yusheng faced Yang Zi, stretched out his hands together, and said in a trembling voice: "Officer, I killed him." ”

Yang Zi breathed a sigh of relief and motioned to Haizi to pay close attention to Wang Yusheng's movements, and he was ready to find out how Wang Yusheng killed Qiu Dafu on the spot.

The truth appeared in front of Yang Zi's eyes step by step with Wang Yusheng's narration, and on October 7, the two made an appointment to drink together......

Another quarrel broke out, and Qiu Dafu wanted to hit him, but was bitten on the arm by Shar Pei......

He resisted, and unintentionally scuffled with Qiu Dafu, and he couldn't bear to swing the axe......

He panicked when he killed someone, and then he was delusional about the luck of escaping, and dismembered the body according to the usual method of browsing on the Internet......

The corpse was dragged in the bathtub and chopped into large pieces with an axe, covered in blood......

Large chunks of corpses were frozen, and I went to buy what I needed when I got off work, such as a saw, a vice, a pressure cooker, and spices......

The corpses were sawn into small pieces after being cold, and the bathtub was full of scraps of minced meat......

All the minced meat scraps are put into a pressure cooker one at a time, and the thick spices are added and cooked into a soup......

The bones were also cooked in the same way and crushed into pieces with no effort......

The most difficult thing to deal with is the head, hands, and feet, which have wasted some strength, but fortunately, the head was smashed open before, otherwise it would take time to open the skull before putting it in the pot to boil......

The internal organs were not divided, and they were directly cooked and taken to the public toilet in Fengshui Lane, Renyi Road, a remote Zhongnan community, which was randomly selected on the map, and had not yet been fully used, but when I took it off the car, the bag broke, so I threw it in......

Speaking of this, Wang Yusheng's eyes straightened, he pointed to the balcony window facing Yang Zi's back in a daze, and muttered, "He's here...... He's coming for me...... He told me to accompany him to ......"

Rao is a man like Yang Zi, who was full of righteousness, was taken aback by his sympathetic tone, and subconsciously looked back at the balcony window.

There was nothing outside the window, not even a trace of wind, Yang Zi carefully observed for a long time, but found nothing.

But Wang Yusheng stared at a place outside the balcony with frightened eyes, trembling all over, as if he had seen the most frightening thing in the world.

Following his gaze again, Yang Zi finally saw several wild cats shuttling silently in the dense bushes on the hill next to his house.

Perhaps sensing their gaze, the cats actually looked this way, and without exception, their eyes radiated a faint green light.

Seeing these cats, Yang Zi's first feeling was that they were so fat cats, they were all wild cats, but these cats didn't know what to eat, and they would grow so fat......

Suddenly, Yang Zi seemed to think of something, he turned his head to look at Haizi, the eyes of the two met together, exchanged a moment, and understood that they thought of each other in their hearts, and after retracting their gaze, they each shivered lightly.

Sure enough, under the appeasement of Yang Zi and Hai Zi, Wang Yusheng, who finally came to his senses, had a smile on his face that was more ugly than crying, looking at those wild cats, he was suddenly not afraid.

Then, he affirmed their doubts in a series of comparisons, and after Qiu Dafu's body was chopped up and cooked by him, he fed the wild cats in several days.

A strong man weighing 170 pounds of 1.8 meters was only fed by these cats for about a week, and when he couldn't feed them, these greedy cats stayed on his balcony for two or three days before slowly dispersing.

Wang Yusheng was handcuffed by Yang Zi and Hai Zi and taken downstairs, at this time, Guo Songzi, who had been peeping, seemed to know about Wang Yusheng's arrest, and she rushed over with the bag of possible physical evidence picked up from the back mountain.

She told Yang Zi what she had heard, seen, and even smelled after this time, and then handed Yang Zi the bag of things she had picked up from the mountains behind.

After listening to her testimony as a witness, Wang Yusheng was struck by lightning, probably because he didn't expect that there was an eyewitness to everything he had done, who could completely testify against him.

Seeing the piece of jade that was bought for Huang Xing'er and transferred to Qiu Dafu by her, Wang Yusheng's eyes were red, maybe he remembered the grievances with Qiu Dafu in the past forty years, and remembered all the feelings and hatreds between them and Huang Xing'er.

In addition to confessing to the circumstances of his murder and dismemberment, Wang Yusheng provided new clues, that day it was Qiu Dafu who beat him first, he said that he was just overly defensive, and asked Yang Zi to record this point so that they could be punished lightly in sentencing.

At this time, Haizi came in from outside with Qiu Dafu's mobile phone call slip, and pointed to the last phone number that spoke to Qiu Dafu for Wang Yusheng to identify.

Looking at this record, Wang Yusheng was suddenly speechless, not knowing what to say.

This is a mobile phone number that has not been registered with his real name, and it is the number that Wang Yusheng purchased in advance to make an appointment with Qiu Dafu.

On October 7, he used this mobile phone number to call Qiu Dafu and ask him to come to his house for a drink, and at the same time said that he wanted to talk about things between them.

Originally, it was common for them to meet each other, but that day after drinking, Qiu Dafu's usual arrogance came out again, and when Wang Yusheng asked Huang Xinger and Wang Meifeng if they were okay, Qiu Dafu's answer made Wang Yusheng angry and annoyed.

The two quarreled like this, until they both lost their minds and started to move, according to the convention, it was Qiu Dafu who made the first move, but Wang Yusheng raised the axe and ended Qiu Dafu's life in the fight.

From drinking together to killing and dismembering the body, Wang Yusheng has always been in a premeditated action, including Qiu Dafu who took action against him first, all because he knew this brother's temperament too well and knew under what circumstances he could provoke his anger.

Although Wang Yusheng was still honest at this time, if it weren't for such a cruel fact from his own mouth, probably no one would associate a crime of malicious murder and dismemberment with him.

But Qiu Dafu always fell under his axe, no matter how many things Qiu Dafu did that made him angry, after all, he was not guilty of death.

Is it the pity of the murderer, or the hatefulness of the slain, and there must be something hateful about the wretched, and between them? Who is more innocent?