I made a copy at the police station

Chapter 162 Luminol Reagent (Please subscribe, please vote!)

The conference room was now filled with all the Canglin Police officers responsible for the case.

After several days of investigation, they investigated all the details related to the case, especially the deceased's mistress Chen Wei.

"Based on the conditions provided by Team Leader Li, we conducted statistics on the entire village. According to the conditions, there are 1.7 villagers with a height of over 15 meters and a half, including Chen Wei, the lover of the deceased, there are 16 people in total.

Among them, excluding those who were not suspected of committing the crime and did not have the time to commit the crime, there were 14 people.

Chen Wei was suspected from the beginning. We can't believe everything he said. But so far we have not found direct evidence that he committed the crime. Well, in fact, there is no indirect evidence either. After checking their chat records, there was no necessary relationship between him and the deceased. There is a conflict about killing, and the relationship between the two is stable, so it is unlikely that he will kill someone.

There was another suspect, Qiao Liangfu, who was temporarily ruled out as a suspect because he was only 1.7 meters tall and did not meet the restrictions given by Li Xiang.

During this re-investigation, a man appeared in our sights. This man's name is Qiao Baoshan, the son of Mr. Qiao. He is 34 years old, unemployed, and likes to play cards. He often plays cards with Qiao Liangfu in Tan Qinglian's canteen. "

"Old man Qiao's son? Why was he not included in the previous investigation?"

When Li Xiang asked, Ding Youqiang explained: "When we investigated him before, he had an alibi and no time to commit the crime."

"Then why is he listed again now?"

"Because Old Man Qiao is dead, and his alibi was provided by Old Man Qiao. Now that Old Man Qiao is dead, he has no one to provide him."

When the police initially investigated Qiao Baoshan, Old Man Qiao provided an alibi. Later, Old Man Qiao died, and the police subconsciously ignored this person.

Now, according to Li Xiang's request, he sorted out the people in this village again, and then brought him out again.

Because Old Man Qiao had such a relationship with this case, as Old Man Qiao's son, and met several of the conditions Li Xiang mentioned, the suspicion gradually grew, and he came into the police's sight.

Li Xiang nodded, understanding what was going on, so he continued to ask: "What is this person's financial situation like?"

"Like Qiao Liangfu, he doesn't have much money, he likes playing cards, and he also owes a lot of debt. He's just a little better than Qiao Liangfu."

Ding Youqiang's preliminary preparations were very thorough, and he had a very clear understanding of Qiao Baoshan's personal situation. Basically, he could answer whatever Li wanted to ask.

"Currently, this person is the most suspect. I suspect that Old Man Qiao knew that his son killed Tan Qinglian and gave false evidence to his son, but he couldn't bear it, so he risked his taboo and went to watch Tan Qinglian's funeral."

Li Xiang made contact and speculated on a very reasonable hypothesis, which was also recognized by the task force.

"That's what I think. Otherwise, there would be no reason for Old Man Qiao to go to Tan Qinglian's wake. It might be out of guilt or atonement!"

"Bold assumptions, careful verification, and immediately launch an investigation into Qiao Baoshan!"

After the meeting, the task force immediately arranged for the police to go to Old Man Qiao's home to investigate. Ding Youqiang even applied for a search warrant and prepared to conduct a detailed search of Old Man Qiao's home.

"Captain Ding, let me go to Sanhe Village with you again."

Li Xiang's case has been concluded and his work has become relatively easy.

The Sanhe Village case has reached a critical moment again, and he also wants to follow up to see what is going on with this case.

"That's great."

Ding Youqiang knew that Li Xiang was really capable. If he could personally participate, it would definitely improve the progress of solving the case. He usually couldn't invite him, but now that he brought it up himself, it couldn't be better.

Four police cars in a row headed to Sanhe Village one after another, and finally stopped in front of Old Man Qiao's house.

The task force had established contact with Qiao Baoshan, so he was also at home at this time, standing at the door of the house with his aunt, waiting for the police to come.

After seeing Ding Youqiang get out of the car, he quickly took out a pack of Zhonghua from his pocket and stuffed it into Team D's pocket: "Captain D, smoke, smoke."

"What are you doing? Take it back. I don't smoke."

Ding You blocked the smoke with a strong hand, and his face darkened at the same time.

The leaders of the provincial department were watching at the scene. Qiao Baoshan's actions made him look like he usually took benefits from the people.

Seeing that Captain Ding refused to accept it, Qiao Baoshan was a little confused. Finally, he stuffed it into his pocket again and said: "Captain Ding, this matter really has nothing to do with me. I really removed the eel with my dad that night. He can testify for me." , can’t the confession we recorded before be invalidated just because he died?”

"It's not invalidated. After all, this is a murder case. Based on the principle of solving murder cases, our police will take it very seriously. We will not wrongly accuse a good person, and we will never let a bad person go. Don't worry, as long as it was not you. If you cooperate well with the police investigation, everything will be fine."

"That is, that is, I will definitely cooperate well."

Li Xiang began to observe Qiao Baoshan's every move after getting off the car. As his experience in handling cases continued to accumulate, he also gained some experience in the psychology of criminals. No normal person can treat him calmly after killing someone. There are still a small number of murderers who can kill without blinking an eye, and these people can no longer be called normal people, but psychopaths. Once they commit a crime, it is difficult to stop.

Qiao Baoshan was obviously not such a ruthless person. Facing the police investigation, it was clear from his first action of handing out cigarettes that he felt guilty.

But this alone does not mean that he is a criminal suspect.

Evidence is also needed.

After entering the house, Ding Youqiang began to ask: "You said you and your father went to catch eels that night?"

"Yes."

"What shoes did you wear that day?"

Catching eels is usually done by rivers or paddy fields. If you go to catch eels, there must be a lot of mud in your shoes. Just look at the soles and uppers of his shoes to know if he is lying.

Qiao Baoshan was stunned. He didn't expect the police to ask such detailed questions, so he had to follow what the police said: "The shoes were washed off. They were too dirty and covered with mud. I washed them off the next day."

"Oh? Really? Then what clothes did you wear that day? Those clothes must be dirty too, right?"

"That's right, the white sweatshirt I was wearing was also dirty, so I washed it off together with my shoes."

When Ding Youqiang heard the white undershirt, he knew that Qiao Baoshan was lying, so he continued to ask: "Really? But why did I hear Qiao Liangfu say that you were wearing black clothes when you played cards that day?"

"It was too hot. I took a shower when I came back and changed my clothes."

“I’m going to touch eels anyway, why don’t I have to take a shower when I get back?”

"I came up with the idea of ​​catching eels on the spur of the moment. My dad said I wanted to go, so I thought about going with him."

During the questions and answers, Qiao Baoshan spent more and more time thinking, especially when Ding Youqiang pointed out some details. If he wanted to get through it, he had to think about it.

After Li Xiang saw this, he was basically certain in his heart that it was this person, but again, he needed evidence.

The law relies on evidence. If there is no evidence, even if you know that he is the murderer, you will not be able to punish him.At this time, he heard Ding Youqiang mention that Qiao Baoshan was wearing black clothes that day, so he interjected: "The black clothes should still be there, right?"

Hearing Li Xiang's words, Qiao Baoshan glanced at him and saw that he was a bit young, so he didn't take it seriously and casually replied: "Yes, still here."

"It's fine here. Please show it to us."

"What's so good about a piece of crappy clothes~"

"What nonsense are you talking about? Just take it if Team Leader Li tells you to take it."

When Ding Youqiang saw that Qiao Baoshan was disrespecting Li Xiang, he immediately scolded him. Qiao Baoshan was more afraid of him as the criminal police captain. When he saw him getting angry, he didn't dare to say anything more than that. He turned back to the house and went to get his clothes.

Seeing Qiao Baoshan go back to get the clothes, Ding Youqiang asked in a low voice: "Is there something wrong with this clothes?"

"Well, I saw the blood stains at the scene. Based on the analysis of the blood spatter, I think a small part of the blood was splashed on his clothes. Have you brought the luminol reagent?"

Luminol appears as light yellow crystals at room temperature. It is often combined with hydroxide to identify blood.

The principle is as follows: the iron in hemoglobin decomposes the hydroxide into water and single oxygen, which is then oxidized with luminol to produce blue-white fluorescence.

This solution has now been widely used in criminal investigation methods, and its verification effect is very sensitive, and it can detect only one part in a million of blood.

"Bring it."

Ding Youqiang understood what Li Xiang meant, so he waved to a technical policeman and asked for a bottle of luminol reagent spray.

Generally, this is more convenient. As long as you suspect there is blood stains somewhere, spray it. If it glows, it proves that there are blood stains in this place.

But this is not a panacea.

Luminol also fluoresces in the presence of iron, iron-containing alloys, horseradish or certain bleaches, and can also detect animal blood, so to confirm it is human blood, DNA testing is required.

Fortunately, after the luminol reagent reacts with the blood, it will not have any adverse effects on the blood, and subsequent DNA testing can still be performed.

"Here we go, even this dress has been washed."

"It's okay after washing. Let's go into the house."

Ding Youqiang took the black short-sleeved shirt from Qiao Baoshan and looked at it carefully.

Since the color of the clothes was originally black, and after the clothes were washed, he didn't notice anything.

So he put the clothes into the room, took out the luminol reagent spray, and sprayed it on the clothes.

Soon, a bright blue glow suddenly emitted from the area where the chemical solvent had been sprayed on the clothes.

Even in the daytime, the approximate area of ​​bloodstains can be clearly seen.

"Emma, ​​the Bodhisattva has appeared, and my clothes are all glowing."

Qiao Baoshan was a little surprised when he saw this phenomenon for the first time and thought that the Bodhisattva had appeared.

"This solution is called luminol reagent. When it touches the blood, it will fluoresce blue-white."

The people in the village were ignorant and mistook science for miracles, so Li Xiang explained.

After hearing Li Xiang's words, Qiao Baoshan's expression changed and he said in disbelief: "Impossible, I washed my clothes, and you framed me."

"Luminol is highly sensitive to blood. Even if the blood is washed by you, there will still be some invisible blood stains on your clothes. Even if the blood is diluted to one part per million, it will still be detected."

The blue light lasted for about half a minute, which was enough time for the technical police brought by Ding Youqiang to take photos and collect evidence.

When Qiao Baoshan heard what Li Xiang said, he collapsed to the ground.

Seeing this situation, the aunt ran over quickly, hugged Qiao Baoshan and asked with concern: "Son, what's wrong with you? Does it hurt from the fall?"

"Mom, I'm sorry for you. I killed Tan Qinglian."

"What? Why are you so stupid? Why did you kill her?" When the aunt heard her son say this, it was like a thunderbolt in the clear sky, and she was stunned on the spot.

In her impression, although her son was uneducated and idle all day long, he was only good at gambling and would not dare to kill a chicken, let alone kill someone?
"I didn't want to either. I just wanted to steal a few dollars to spend. She suddenly appeared and said she would call the police to arrest me. I couldn't help it. I couldn't help it."

The mother and son held each other's hands and cried. They really had a deep love for each other. If someone who didn't know about it watched this scene, they wouldn't know if the police had done something to them that was outrageous to both humans and gods.

"Qiao Baoshan, come back to the bureau with us and cooperate with the investigation."

Now that the truth has come to light, Ding Youqiang can finally breathe a sigh of relief and give an explanation to the public.

"Son, your father is gone, and you have to leave too. How will I live in the future?"

Watching the police car go away, the aunt knelt at the door, looked up to the sky and sighed, crying loudly.

Qiao Baoshan's interrogation work went extremely smoothly. At the same time, he also explained where he had lost his crime tools.

The police from the task force searched for half an hour at the location designated by him and found the fruit knife he used to commit the crime.

And this knife belongs to Tan Qinglian's family.

In fact, the cause of the matter is very simple. Qiao Baoshan and Qiao Liangfu have been playing cards together at Tan Qinglian's canteen all year round. They are financially strapped. His old father has been supporting him all year round, and he has never had much money.

Because she often saw Tan Qinglian selling things for money and putting the money in the drawer, she came up with the idea of ​​stealing the money.

He even wore gloves to avoid being spotted by the police.

On the night of the incident, he was playing cards with others at the canteen. After losing the money, he did not go home. After giving up his seat, he watched the excitement there. When it was about to end, he hid in the toilet in advance and waited until Tan Qinglian closed the door. , come out to steal things again.

Who knows, while he was stealing, Tan Qinglian suddenly came out. When she saw it was him, she shouted to send him to the police station.

Qiao Baoshan was worried that the matter would be exposed and was extremely anxious. At this time, he happened to see a fruit knife on the reception desk that Tan Qinglian often used to peel fruits. So he was heartbroken and decided not to do anything else. He picked up the fruit knife and pointed it at Tan Qinglian's body. Stabbed over.

At that time, his mind went blank. He was worried that Tan Qinglian would not be killed by one blow, so he stabbed her a few more times, and a lot of blood was spattered on her body and face. It was not until he saw her lying on the ground motionless that he knew he was in trouble, so he ran away quickly. Went home.

(End of this chapter)