Accountant Sun in the nursing home was raped and killed, and the murderer was ruthless, and the five-year-old child was not spared. Pen, fun, pavilion www. biquge。 info

His wife and children were all gone, and her man cried heartbreakingly. Accountant Sun's mother fainted on the spot when she heard the news, and the two old men of the Liu family were equally grief-stricken.

People in Chengdong Town are panicking, including many people in the county seat, who don't let their girls or daughters-in-law go out at night these days. The impact is too bad, this rape and murder case is not solved, how can the people of Donggang have a stable and peaceful Spring Festival?

Secretary Yue of the county party committee came to the special case group set up at the Chengdong police station to listen to the report, and Secretary Zhang of the Political and Legal Committee made several phone calls a day to ask about the progress, and there were only three days left before New Year's Day.

Yuan Zhen, deputy captain of the criminal police, handed over the inspection report just sent by the technical team of the criminal police detachment of the listing bureau, and said nervously: "Bureau Zhang, this is the fourth batch, it is not compared, it is not at all. ”

In the past two days, more than 100 police officers have been organized to investigate the ex-convicts of Chengdong Town and young and middle-aged men from several villages near the scene of the crime. 33 in the first batch, 42 in the second, 56 in the third batch, and 87 in the fourth batch, all of which were excluded.

The test costs money, compared with the paternity test that can easily cost thousands or even tens of thousands, the charge of 300 for a sample of the criminal police detachment of the municipal bureau can be called a conscience price, but none of the 60,000 or 70,000 yuan spent can be compared, and Zhang Baoli no longer has the same confidence in the high-tech of "burning money" as before.

"Jin Yang, Yuan Zhen, think about it again, have we missed any omissions in our investigation, and have we ignored any clues in our previous detection?"

"Three watches in the middle of the night, no witnesses. ”

Jin Yang, the captain of the criminal police brigade, had not slept well for several days, his eyes were bloodshot, and he lit a cigarette and analyzed: "Chengdong Town is not a big city, and there is no monitoring around the crime scene;

Before his death, the victim was just an ordinary accountant, and his career was not established. Working in a nursing home, it is impossible to offend anyone. Liu Xiangguo ran a business, and he didn't offend anyone, and it is unlikely that the vendetta was disguised as robbery, robbery, rape and murder. In a typical occasional case, the murderer is very likely to be improvised at the beginning.

There are no outsiders in Chengdong Town, and the road north of the crime scene is not a traffic artery, so it is extremely unlikely that the crime will be committed. The murderer is definitely a local, even from Chengdong Town. ”

"Expand the range?"

"If you want to solve the case as soon as possible, this is the only way, organize the police to investigate again, focusing on those who have been out in the past few days, and at the same time collect blood samples from men aged 18 to 35 in four villages near the scene of the crime who cannot tell their whereabouts that night. ”

The county leaders demanded that the case be solved "at all costs", but the key is that this "price" is too high, and if hundreds of people are prosecuted again, there will be no one or another, and more than 100,000 or 200,000 yuan will not be wasted.

Zhang Baoli frowned and said: "As long as the case can be solved, it is nothing to spend more funds, the DNA laboratory of the key city bureau has just been built, and the technology is not very mature, and I really don't know whether the test results are accurate or not." ”

What the murderer left at the scene was a very ordinary cotton gauze glove, labor protection supplies, almost every household has them, and even several pairs of them in a family, and it is difficult to find the murderer through the gloves.

Jin Yang knew that this was too exaggerated, and there was no better way to do it, so he said eagerly: "Zhang Ju, you know the person 'Han Strike', don't look young, in fact, he is very stable, he should have no problem personally inspecting it, and the equipment of the city bureau is said to be the most advanced." ”

The city bureau only charges the cost, and the "price" to be paid will be greater if it is sent to other units to inspect people to make money.

Zhang Baoli weighed it, clenched his fists and said: "I can't bear the child to trap the wolf, just do what I just said, the action must be fast, the efficiency must be high, and we can't delay time anymore." ”

"Yes!"

At the same time, Deputy Director Tang and Deputy Director Cui are reporting to the Chen Bureau at the Municipal Party Committee.

Since being appointed as a member of the Standing Committee of the Municipal Party Committee, Secretary of the Political and Legal Committee, and Director of the Public Security Bureau, Chen Ju has moved to the office of the Municipal Party Committee and rarely returns to the bureau.

After talking about a few major events, Chen Ju put down the document he had just signed and asked, "Lao Cui, has there been any progress in the 12.22 case?"

"Comrade Guoqiang came back yesterday, and there has been no progress in the investigation work for the time being. ”

There were only a few days left in 2001 and there was a murder case in which two people died, which directly affected the homicide detection rate in Nangang City in 2001, and it was a mother and son who died, and the impact was too bad.

"Comrade Guoqiang is back, which means that staying in Donggang will not provide much help, what is Xiao Han doing?"

He and Dr. Tian have been taking turns testing the blood samples of the suspects sent for testing in Donggang for several days. Before I came, I went to the technical brigade, he was on the night shift and had just come out of the laboratory. I stayed up all night, didn't go to rest, and went to the medical school with an incubator for inspection materials, as if I wanted to borrow someone else's laboratory to do some experiments. ”

"It takes time to develop talent, and no one can only test it for the time being. ”

Dr. Tian said that as long as you have a certain foundation, it is not difficult to learn DNA testing and identification. He is working hard now, and it will be good to wait for the talent to be cultivated. ”

……

Tackling difficult and complex cases requires skills and methods, diligence and concentration, continuous learning and enrichment of all aspects of knowledge, as well as inspiration.

Especially when the case is solved and the situation is exhausted, it is more necessary to find a breakthrough in the case. It could be an inconspicuous trace, it could be a casual action, or it could be a tiny piece of common sense.

The question of why the murderer left so little semen has always haunted Han Bo's mind.

To test so many blood samples, the Donggang County Bureau has to invest 60,000 or 70,000 yuan for this, Han Bo didn't want people to spend more money, so he hurried to Nangang Medical University, which he had contacted in advance, with the inspection materials, and borrowed someone's high-powered microscope to verify a seemingly ridiculous idea that came out of the night.

It is easy to do things with acquaintances, and there is no need to ask the leader to coordinate.

Lao Lu's daughter-in-law Zhao Xiuli is very powerful, the chief physician of the First People's Hospital, associate professor of medical university, and master's tutor, and she helped arrange the pregnancy test for his wife.

Han Bo put down the incubator and thanked him again: "Sister-in-law, I'm sorry to always trouble you." ”

"It's not an outsider, don't be so polite. Zhao Xiuli held her glasses, pointed to the incubator and asked with a smile: "Tell me, what's going on, see if I can help?"

She is a professional, much more professional than her old classmate Tian Xuewen.

Han Bo opened the box, took out the sample materials, and said bluntly: "We encountered a rape-homicide case, and the investigators at the scene collected the murderer's semen from the deceased's body, but the semen was very small, and it was almost not detected. Two people died, among them were children, the elderly are unlikely to commit the crime, why is there so little semen in young men, I suspect that the murderer had a ligation operation. ”

It's really imaginative, and the little fellow Sigang promoted by his father-in-law is so funny!

Zhao Xiuli put on gloves, took the sample and said with a smile: "Han Bo, male ligation is only a ligation of the transfusion tube, which only affects reproductive function, not sexuality, and the seminal plasma composed of trapped sugar, protein, prostaglandins and some enzymes is secreted normally, and there is still semen-fluid outflow, but there is no sperm in the semen-plasma." ”

"So I wanted to see if there was any sperm in there. ”

"But sperm is alive and can't survive long outside the body, do you want to test if there is a 'corpse' of sperm inside?"

Fortunately, it's your own people, and if you were someone else, you would be laughed at to death.

Han Bo hurriedly explained: "Sister-in-law, the victim was killed in the wild, and the weather was close to zero that night. The comrade who collected the sample came with you, a master's student of Peking Union Medical College, who had just graduated. He has a good habit of refrigerating as long as it is a biological sample. That is, the sperm in the semen-fluid should be alive. ”

It will die quickly at room temperature, the climate is very cold, and it is another matter to keep it refrigerated. Zhao Xiuli nodded, and picked up the test tube: "Since that's the case, let's try." ”

There is no need to do a sperm-child activity test, just use a high-powered microscope to see if there are "tadpoles" in it.

Zhao Xiuli felt a little unbelievable, and prepared another test piece, but there was no such thing, not only the "little tadpole" that was not alive, but the dead "little tadpole" also did not exist.

"Han Bo, you are right, if there is no problem with the sample, then the murderer you want to arrest may really have been sterilized, or have problems with reproductive function. ”

Han Bo was overjoyed, took out his mobile phone and said with a smile: "Whether it is ligation or fertility dysfunction, he has a problem anyway, so we can narrow down the scope of investigation." ”

"Look at you. ”

"I'll talk to my colleagues first, and then we'll talk after the briefing. ”

Han Bo smiled apologetically, and as soon as the phone was connected, he said excitedly: "Zhang Ju, my criminal police detachment Han Bo, I would like to inform you of an important situation, we found that there was no sperm in the semen collected by the investigators, which means that the murderer is very likely to have undergone sterilization or reproductive dysfunction." ”

How much can this narrow the scope of investigation, Zhang Baoli, who was anxious, was ecstatic, and immediately got up and said: "Han detachment, thank you so much, this is an important clue, we immediately adjusted the deployment, focusing on the investigation of adult men who have undergone sterilization or have reproductive dysfunction in Chengdong Town." ”

Can't mislead the direction of the investigation of the task force, Han Bo hurriedly said: "Zhang Ju, it's not a secret, this new discovery has great uncertainty, after all, too few samples have been collected, and several days have passed. You can't just put your eggs in one basket and have to prepare both. ”

"It's better to have clues than no clues, and we need to expand the scope of investigation anyway. Han detachment, we immediately adjusted the deployment, and then we will trouble you, and we will trouble you to test and compare the blood samples of the suspects. When the case is solved and the murderer is caught, I will definitely come to thank him. ”

"Zhang Ju, don't be so polite. Serving the whole police and supporting the handling of cases is the duty of our technical police. That's it, you get busy first. ”

………………

ps: Chapter 1, ask for subscription support again! (To be continued.) )