The little catcher in the police station

……

Seeing the police escorting Sun Fengyun into the police car, the crowd watching the fun applauded and cheered.

After Sun Fengyun was taken away, no one stopped Jiang Hao and the others, so they entered the house, preparing to conduct a detailed search of the entire house.

It can be seen that Sun Fengyun cleaned the house very neatly and the environment was not chaotic.

Jiang Hao and the others put on shoe covers and gloves, then activated the 'survey technique' and 'tracking technique', and searched room by room.

Walking into a bedroom on the second floor, Jiang Hao saw a photo of Yan Youlong and his mother on the bedside table. In the photo, Yan Youlong was young, handsome and energetic at that time, unlike himself in the detention center now. 40 years old, with a 50-year-old face.

"This should be Yan Youlong's bedroom."

Although Yan Youlong had been in prison for ten years, his bedroom was well preserved. Apparently his mother didn't mess with the layout, which was undoubtedly good news for Jiang Hao.

Therefore, Jiang Hao carefully surveyed the room in all directions without any dead ends.

From the bedside table to the wardrobe, from the bed, to the bottom of the bed.

He searched very carefully, even every piece of clothing and every pair of trousers in the cabinet was turned out and checked carefully.

The whole room was basically turned upside down by Jiang Hao, but there was nothing.

"Is there really no clue at all?"

Just when Jiang Hao was a little disappointed, he suddenly heard Xu Danying shouting from next door:

"Team Jiang, come here quickly, there is a safe here!"

"coming!"

Jiang Hao ran over quickly. This was a study room, and he saw a very small safe in the corner of the study room.

This is an older mechanical safe.

Xu Danying tried the lock, but the safe was locked. She quickly picked up the phone and said:

"I'm here to contact the detention center and ask the prison guards to ask Yan Youlong what the password for this safe is!"

And Jiang Hao came to the safe, squatted down, turned the lock gently, and listened carefully to the sound made by the friction of the gear structure inside.

Crack~crack~crack~

Jiang Hao kept trying various rotation methods, thanks to his extraordinary hearing.

Through the sound of gears rubbing, the mechanical gear structure inside the safe was slowly modeled in his brain.

"Team Jiang, Yan Youlong said he forgot the password, I'll go find the unlocking company!"

After finishing the phone call, Xu Danying said to Jiang Hao angrily.

Even if you don't have a password, you can find an unlocking company to get it done.

"No, it's already opened!"

Jiang Hao twisted the lock of the safe and opened the door of the safe very smoothly.

Xu Danying was immediately surprised by this sudden move:

"Can you still pick the lock?"

"Understood!"

Chapter 742 Objectivity Evidence

I have known Jiang Hao for more than a year, but Xu Danying found that as long as she is with him, she will always be amazed by his little life skills.

Completely complied with that sentence, he seemed to be able to do everything except for his own cooperation in giving birth to a child!

While Xu Danying was thinking wildly, Jiang Hao had already taken out the safe one by one.

There are some gold and jewelry in it, as well as some worthless things, which may be commemorative gadgets for Yan Youlong personally.

As the jewelry was taken out one by one, Jiang Hao suddenly had a flash of inspiration, and he recalled one thing.

When Yan Youlong was interrogated earlier, the other party had confessed that when he was in love with An Lili 21 years ago, he bought her a necklace worth more than 8000 yuan.

But at the scene of the crime at the time, the police did not find any necklace on An Lili's body.

When the police conducted financial verification with An Lili's mother, Sang Sufeng, the other party did not mention that An Lili lost a necklace, which also prevented the police from paying attention to this necklace.

So in the dossier, Jiang Hao did not see any information about this necklace, which also caused him to subconsciously ignore this important clue.

Now seeing the jewelry in the safe, he suddenly remembered this clue.

Could that necklace be in there?

With this in mind, Jiang Hao immediately put all his attention on these jewelry and began to look for suspicious necklaces.

With the blessing of the skill of 'Reconnaissance Technique', Jiang Hao finally found some dark brown traces in the chain of one of the necklaces, where it was difficult to clean.

It's very much like blood stains after blood coagulation, and there are no traces left after washing.

"It should be it!"

The location of An Lili's wound was exactly on her neck.

Jiang Hao was able to reconstruct that when Yan Youlong slashed at An Lili's neck with a knife, he happened to see this necklace, so when he killed An Lili, he took off the necklace.

As a result, the necklace was stained with An Lili's blood.

Although Yan Youlong cleaned the necklace afterwards, there were still some blood stains on the joints of the necklace, the inner walls of the slits and other places that were difficult to clean.

This is important physical evidence!

Seeing this, Jiang Hao instantly became excited. Maybe this necklace can play a key role in convicting Yan Youlong.

Now it's time to see if these blood stains are actually An Lili's blood.

"Yingying, bring an evidence bag!"

Jiang Hao took the evidence bag from Xu Danying, and prepared to take the necklace back to the laboratory for examination, extract the blood stains on it, and compare it with An Lili's DNA.

"This necklace, is it...?"

Seeing the movements in Jiang Hao's hands, Xu Danying seemed to have guessed something, and a smile appeared on her face instantly.

"Yes, if the DNA comparison shows that it is indeed consistent with An Lili's DNA, then the case is basically over."

"Great, God has eyes and didn't let him escape legal sanctions."

With this necklace, there is objective evidence. Even without the machete and other objects, it will not have much impact on Yan Youlong's trial.

After searching the house, Jiang Hao and the others left the house. Yan Youlong's mother was still at the Binjiang Police Station, so he had no choice but to close the door for her.

Jiang Hao returned to the bureau with the evidence, and immediately sent the necklace in the evidence bag to the laboratory.

The sooner he confirms, the more Jiang Hao can lose his mind.

At this time, Bento was also inspecting Corey, waiting for the results of the knife inspection.

After seeing Jiang Hao coming, he asked in surprise, "Captain Jiang, why do you have time to come?"

"Send something here for inspection. I found it at Yan Youlong's house. What happened to the knife?"

Jiang Hao picked up the evidence bag, showed it to Hou Fan, and then asked him about the situation.

"The composition of the blood stains on the knife is relatively complex, and it is very difficult to extract. The blood on the knife is not from one or two people, but from a lot of people. There is no good result yet."

Hou Fan told the truth, hesitating that Yan Youlong's knife was used in multi-person fighting, and the blood of no less than a dozen people was stuck on it. He wanted to extract the blood of 21 years ago from the blood of these dozens of people. The difficulty is really unimaginable.

"Let's put the knife thing aside, first check the blood stain on this necklace, is it An Lili's?"

"This is the necklace Yan Youlong gave An Lili?"

"Correct!"

Jiang Hao nodded, then handed the necklace in his hand to Hou Fan, and then got ready to get off work, Xu Danying was already waiting for him.

And tomorrow, coincidentally, is the seventh day.

When he returned to Xu Danying's house, Xu Wenxiang, the father-in-law, was sitting in the living room again. When he saw Jiang Hao and the others coming back, he called them over.

"How is it? I heard from Yingying that you found that necklace? Did he give it to you?"

Since Jiang Hao had been sleeping at Xu Danying's house for the past few days, Xu Wenxiang would ask them about the case with concern every night when they were eating.

Xu Wenxiang was also an insider, so Jiang Hao didn't shy away from him. Basically, he would inform him about the progress of the investigation. Hearing his question, Jiang Hao could only tell the truth:

"It's not very sure yet. Yingying has given the photo to Yan Youlong for confirmation, and he is sure, but in the end, whether it is true or not depends on the success of the DNA comparison!"

Jiang Hao's words are very safe. Before the comparison results come out, everything is possible.

"I didn't expect that An Qibing's case would be resolved so soon. I thank you for An Qibing!"

Although the test results have not yet come out, Xu Wenxiang heard Jiang Hao's logical analysis, basically there is no problem, and it is only a matter of time before the test results come out.

At this time, he paid more attention to Jiang Hao's ability in his heart.

Back then, a task force with dozens of people was able to mistake the murderer, but Jiang Hao found clues from the file in just six days, and finally found out the real murderer of this case.

【Actually, Jiang Hao is fine as my son-in-law! 】

Seeing Xu Wenxiang's auntie smile on Jiang Hao's face, Jiang Hao was overjoyed. It seemed that the Anning Village case was solved, and there was an unexpected joy!

On the morning of the seventh day, Jiang Hao and Xu Danying appeared in the office together again.

When Hou Fan saw Jiang Hao and the others coming in, he immediately joked, "Have you noticed? Team Jiang is going to and from get off work with Xiao Xu at these times. It seems that we are not far away from our wedding day!"

Chapter 743 [Mystery in Anning Village], completed!

With the emergence of important physical evidence in the Anning Village suspicious case, it became possible to convict Yan Youlong, and everyone felt relieved immediately.

At this time, seeing Jiang Hao and Xu Danying coming to work together again, everyone showed expressions of "I understand".

"Then everyone's share money can start to prepare!"

Jiang Hao also echoed with a smile, Xu Danying seemed to be used to everyone joking like this, but she was not embarrassed any more, everything seemed very natural.

"Has the comparison result come out?"

After the joke was over, Jiang Hao asked Hou Fan, after all, the result of the comparison is related to whether the case can be closed.

"It's already come out. The comrades in the inspection department worked overtime last night and made the results all night. I went there early in the morning to get them!"

At this time, Hou Fan hurriedly picked up the DNA comparison results that he had just received in the morning from his desk.

"After comparison, the sample extracted from the necklace was compared with the victim's blood sample through the DNA database, and the result was positive!"

Seeing the positive result, Jiang Hao breathed a sigh of relief:

"Great, finally there is evidence to convict him."

At this time, Shen Quan, who heard the news, also came to their office. After learning the result of the comparison, he sighed: "If this result can pass the DNA review and exclude false positives, our case It's basically broken!"

"False positive? Can this thing be false?"

Jiang Hao asked puzzledly.

"That's for sure. The review of false positives in the DNA identification conclusion is mainly to determine whether there is a possibility of mutual contamination between the test material and the victim's sample. Generally, the review is conducted from the following aspects:

First, the sources listed in the DNA identification are in one-to-one correspondence with the traces of physical evidence recorded in the on-site inspection records. DNA samples from unknown sources, extraction and packaging that do not meet the specifications, and samples that may be contaminated are excluded. The inspection materials submitted by persons with interests in the defendant.

Second, review the process of collecting, storing, and submitting blood samples on the necklace to rule out the possibility that the blood sample of the victim may contaminate the necklace inspection materials, or even plant and frame the victim to forge the traces of physical evidence at the scene.

Third, the records of the extraction, packaging, and preservation of the necklace, and the signatures of the personnel who handle them, are used to judge whether the source process of the inspection material meets the normative requirements for the extraction, preservation, and submission of forensic evidence inspection materials, and whether cross-contamination prevention is adopted. measures etc.

Fourth, review the reliability of the DNA testing process. Our laboratory still complies with national standards. "

After speaking, Shen Quan paused, looked at Jiang Hao and smiled, and continued:

"These are all later work, and you generally don't like to be responsible for the later work, so it's normal if you don't know, but as an excellent criminal policeman, you have to learn these things to some extent!"

"Yes!"

Hearing what Shen Quan said, Jiang Hao realized that there are still so many things in the later stage of the case, and he believes that these things are just the tip of the iceberg among the many complicated procedures. After all, the court still has strict procedures for executing the death penalty. To prevent unjust, false and wrongly decided cases!

Seeing Jiang Hao's serious face, Shen Quan comforted him immediately:

"Relax. Judging from the current situation, the possibility of a false positive is very low. Besides, Yan Youlong has already confessed. It is basically impossible for the case to be wrong."

He knew Jiang Hao's strengths and weaknesses, and solving cases was his strong point, but he was very impatient in the follow-up procedures, and he was even afraid of the trouble of writing a report. This was the reason why he refused to be the team leader.

But then again, how can there be a perfect person who employs someone to use his strengths?