As for luminolol reagent......

The match is a good match, and they all carry the materials they need, but at this time, this reagent, which is very useful for detecting blood stains, is not suitable at this time.

The luminol reagent fluoresces when exposed to blood because the hemoglobin in the blood contains iron, which can catalyze the decomposition of hydrogen peroxide, turning it into water and oxygen, and the oxygen re-oxidizes luminol to make it glow.

But it's a rusty iron rod......

"Put it away, go back and take it back, and use other methods to do a bloodstain test. Remember to protect the various traces on it, so that Xiao Chai and Lao Yan can do a detailed examination, maybe, they can not only judge whether the dark red coagulated substance on the top is blood, but also whether it is Chang Yan's blood. ”

"Okay." Qi Yuan nodded, carefully wrapped the iron rod in plastic film, took it outside and put it in Su Ping's car.

Soon after, more and more physical evidence was found, including discarded wires that had been stubred or even broken, clothes hangers that had been beaten to the point of deformation, and broken wood stained with a little blood, and a small amount of mildew......

There was even a slightly sunken aluminum pot, Qi Yuan picked it up and compared the small pit with his head, guessing that Chu Minghua had picked up this pot directly and smashed it on Chang Yan's forehead.

"This room...... This room ......" Su Ping's whole body trembled: "As long as Chu Minghua can hold something, what can't be used as a tool for him to beat people?"

Beast! This is the humanoid beast! For Chang Yan, this is not home at all, it is a demon cave that he dreams of escaping but does not dare to escape! ”

Brother Song's three were silent.

So far, they are also angry, but they are not as exaggerated as Su Ping. After all, even Qi Yuan has seen a lot of murders, although he has not lost his emotions, he is somewhat numb.

In fact, for the criminal police, they have to try to abandon their personal feelings and not be swayed by emotions when handling cases.

It's just that as Su Ping said, the profession of criminal police is cold, but when you are a criminal policeman, your heart should be hot and sincere.

……

Su Ping finally restrained his temper, gradually calmed down, and said lightly: "The physical evidence has almost been collected, next, let's start the investigation."

Song, you and Xiao Hai visited Chu Minghua's relatives, Xiao Qi, you and I were nearby, visiting Chu Minghua's neighbors. ”

"Yes!"

Seeing Brother Song and Lao Hai leave, Su Ping looked left and right, pointed to the small single-family building about thirty meters away, and said, "Let's start from this house." ”

"Okay."

In the countryside, the doors are generally not closed during the day, and the courtyard doors are wide open, and the building doors are also wide open.

Su Ping walked into the courtyard, paused in front of the building, and asked, "Hello, is anyone home?" ”

Soon, a middle-aged woman holding a broom came out and asked suspiciously, "Are you......?" in Mandarin with an obvious accent Oh, it's the police from the city, right? Investigate Xiaoyan's case? ”

"Yes," Su Ping nodded, saluted, and said, "I am a criminal police officer of the Criminal Investigation Detachment of the Municipal Public Security Bureau, Su Ping, one of the persons in charge of this case." ”

"Come in, come in and talk, my man is at home, let him talk to you, I'll go boil water."

said, without waiting for Su Ping to respond, she left.

Su Ping glanced at Qi Yuan, nodded lightly at him, and walked in with his legs raised first.

When I came to the living room, a middle-aged man was smoking a cigarette and watching TV, and when he saw the two of them, he immediately stood up and asked them to sit down.

"What do you call it?"

"My surname is Chu...... It's called Chu ......"

"Hello Mr. Chu, my surname is Su, you can call me Officer Su." Su Ping said: "Chu Minghua is suspected of illegally buying abducted women and long-term and frequent intentional and violent injuries, and has been detained in accordance with the law.

We are here to collect evidence, determine Chu Minghua's culpability, and give Chang Yan an explanation. If we can, we would like to completely dismantle the criminal gang suspected of illegal human trafficking and rescue other abducted women and children.

I am tantamount to kidnapping you, but there is one thing that must be declared, if you don't report it, cover up the crime, and are also suspected of violating the law, I ask you to cooperate with us as much as possible and tell us the truth.

In addition, if the criminal gang can sell, it can naturally be abducted. If you can sell it here, you can naturally turn around here...... Judging by your age, you should have grandchildren, right? How big? Three years old? Five-year-old? If you want to give them a truly safe and carefree environment to grow up in, then please try to cooperate.

Help us, but also help yourself. ”

Qi Yuan couldn't help but glance at Su Ping.

Su Ping's words actually carried a certain threatening meaning. And this tone is undoubtedly taboo for interviewing potential insiders in the investigation, and it is easy to cause the rebellious psychology of the person being questioned, who was originally willing to cooperate, but when he said this, he didn't say anything.

Of course, things are not absolute, and there are many people who eat soft and not hard, so the methods can be flexibly applied, but the premise is that you have a general understanding of the person being asked, and it is easy to have an accident if you threaten it as soon as you come up.

Obviously, Su Ping was just calm on his face, and in his heart, he was still in a state of being angry and about to explode at any time.

As for being so aggressive, it is estimated that Brother Song's words earlier angered him - when Brother Song roughly inquired about the situation yesterday, they were all speaking for Chu Minghua intentionally or unintentionally.

On the one hand, it is for the sake of Chu Minghua's parents and brothers, and on the other hand, it may also be because Chang Yan is already dead no matter what he says, and he doesn't want to put Chu Minghua in again.

But such a troublesome scourge really wants to exonerate him? What the hell do they think?

In this regard, Qi Yuan also found it difficult to understand.

But he was more worried that Su Ping would break out here, and he was not sure to stop it.

Sure enough, the middle-aged man was stunned by Su Ping's string of words, and he didn't come back to his senses for a long time.

After a while, he shook his head and said, "Honestly...... Xiao Yan's child is miserable, Chu Minghua is indeed a bastard. ”

Hearing this, Qi Yuan breathed a sigh of relief. Fortunately, Su Ping's threat did not have the opposite effect.

"Do you know how she got here?"

"I don't know." He shook his head: "Suddenly it came out, I guess it was really like you said, it was abducted." Otherwise, just like him, whose girl would dare to marry him? It is impossible to say that he met in other places, and he has never been out of the village. ”

"You didn't ask?"

"How do you ask this kind of thing, you know, I know, it's okay to get together occasionally and whisper, and you can run to the door and ask, hey, did your daughter-in-law buy it?" He said, thought about it, and added, "However, there are rumors that their family was bought from the more difficult side......"