For two consecutive days, Jiang Yuan concentrated on processing the fingerprints of the Ding Lan case.

Because he had solved several cases in a row, including a high-profile homicide case, Jiang Yuan's rookie status had almost been completely washed away, or rather, it was shining brightly.

Now, at least in the Ningtai County Bureau, most people had heard of the name "Jiang Yuan".

The most direct impact of this was that no one would ask Jiang Yuan to do odd jobs anymore.

Even Wu Jun didn't ask Jiang Yuan to do anything while he was busy with the fingerprints of the Ding Lan disappearance case. The attribute of "being able to solve cases" was still very impressive at the grassroots county bureau, and ordinary police officers were willing to work overtime to solve cases. They would not take away Jiang Yuan's time, who was also able to solve cases.

And to be honest, only Jiang Yuan could do the fingerprints of the Ding Lan disappearance case.

There were too many difficult fingerprints, and the two local trace examiners in Ningtai County couldn't do them all. If they wanted to seek help from the provincial and municipal trace examiners, the case alone was not enough.

To some extent, this was also a kind of chicken ribs.

Fortunately, Jiang Yuan had no pressure on him. Unlike Wei Zhenguo or Wang Zhong and others, who were always assigned daily tasks, he occasionally had some free time, but he couldn't devote all of it to the case.

Most humans could still relax when they had the chance. If everyone liked to study and work at every opportunity, where would there be the red-light district, the neon nightclubs, and the dimly lit conference halls of pink hair salons?

Of course, the role of forensic medicine could not be ignored. Even without the assistance of skills, its existence itself made Jiang Yuan more focused.

Even Wu Jun couldn't help but comment on Jiang Yuan's work status: "When I was young, if I could dissect corpses as single-mindedly as you, I would have been transferred to the city long ago."

"Is it better to be a forensic doctor in the city bureau?" Jiang Yuan took a sip of tea and rested his eyes.

Wu Jun thought for a moment and said, "The salary is a few hundred yuan higher, at least."

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Jiang Yuan didn't even blink his eyes. "That doesn't make a difference."

"When it comes to welfare housing, the county bureau's housing is in the county, and the city bureau's housing is in the city." Wu Jun glanced at Jiang Yuan and suddenly felt a little bored with the conversation. He waved his hand and said, "It might not make a difference for you Jiangcun people either."

"My family doesn't have many houses in the city." Jiang Yuan explained.

Wu Jun chuckled, feeling that the conversation was getting boring, and pointed to the computer screen. "How are the fingerprints coming along? If there are any clues, let Old Wei investigate. Evidence is not necessarily better with more."

"Another day, all the fingerprints that can be done should be done. It's about time if you calculate it." Jiang Yuan looked at his laptop for a few more seconds, then took out his phone and called Wei Zhenguo.

Soon, Wei Zhenguo ran up.

After climbing four floors of stairs in one breath, Wei Zhenguo was a little out of breath, but his expression was very happy. He asked, "Any results?""Most of them, I'll try a few more that I couldn't solve and see if I can get a few more tomorrow." Jiang Yuan pinned the freshly printed pages together with a stapler and handed them to Wei Zhenguo.

The first one on the paper was a labor reform prisoner.

"Disturbing the peace, fighting... Wow, even worse than this guy, and you didn't call him?" Wei Zhenguo stopped in his tracks when he saw the first item and was itching to act.

"He's dead." Jiang Yuan gave an irrefutable answer.

Wei Zhenguo had a different idea. He looked down at the records Jiang Yuan had made and frowned. "He hadn't died when he left his fingerprints. Ding Lan went missing on March 26th, and he had just been released from prison at that time. If he committed this case... it could be a death sentence."

At this point, Wei Zhenguo regretted finding Jiang Yuan. He had wasted so much of his time, and if the result was a dead end, he would feel bad.

Jiang Yuan was inexperienced and didn't think too much about the follow-up. He just said, "Look at the back."

"En... Disturbing the peace, assault... another one?" Wei Zhenguo only noticed the second person who had been caught after a few short paragraphs.

"He's dead too." Jiang Yuan said again.

"That's not right!" Wei Zhenguo exclaimed, "Two dead people's fingerprints found on a broken bicycle, and they are all professional criminals?"

As a criminal police officer, Wei Zhenguo had already flashed a series of cases in his mind. Gangs committing crimes, unequal distribution of spoils, murder to cover up...

"This person died of cancer. Acute pancreatic cancer. He had surgery and chemotherapy and stayed in the hospital for half a year, suffering a lot." Jiang Yuan said, "I called his mother specifically, and that's what she said."

Jiang Yuan was not completely insensitive, and he said it in such detail to prove that there were no doubts about the death of the second person.

Wei Zhenguo sighed and felt the same worry. If this person was responsible for Ding Lan's disappearance, it could also lead to a death case.

The third person on Jiang Yuan's list was relatively normal, a young man who had only received administrative punishment and was still alive.

Wei Zhenguo shook his head when he saw this. "How did this young girl get to know these people?"

"Social media." Jiang Yuan was far more adaptable in this area than Wei Zhenguo, and he said, "I read the transcript you made before. Ding Lan knew several ex-boyfriends through social media."

"This..." Wei Zhenguo seemed to have returned to the beginning of the case, with a bunch of ex-boyfriends popping up, making the case instantly confusing.

Just a bicycle knocked over on the green belt was not enough to track so many clues.

What was even more worrying was that if a case really happened, the suspect might not have left fingerprints on the bicycle.As for social media... Although social media records exist, extracting them can be more troublesome than ordinary people imagine. It's possible to obtain information through internet and phone communication, but many companies do not provide such convenience and require police officers to go to their jurisdiction and apply for information through the local police station. Due to the need to queue, a business trip often takes one or two weeks.

If you want to check all the mainstream social media platforms, a criminal investigation team won't be able to work on any other cases for the month.

Starting from the fourth fingerprint, the owners are relatively ordinary, at least without criminal records.

Jiang Yuan extracted all the information that could be found in the police system, his authority was not high, and some of it was still searched through Wu Jun's phone. However, the problem remained. To see conclusions from these simple pieces of information, Sherlock Holmes might be able to do it, but Jiang Yuan couldn't.

Wei Zhenguo also felt a headache looking at the information. He said helplessly, "When I started this case, there were no clues, so I put it aside. Now there are too many clues, and I don't know where to start. They say that fortunes change, and today we're stuck."

"If there are no particularly outstanding clues, then we'll just have to search one by one." Jiang Yuan did his own fingerprint analysis like this. In fact, criminal investigation techniques are relatively clumsy, and there are few techniques that make people feel like geniuses just by looking at them.

Many criminal investigation techniques are even third or fourth-hand, or even fourth or fifth-hand techniques, introduced into the field of criminal investigation only after being popularized from the scientific realm to university laboratories, private enterprises, and even within the industry.

There are many reasons for this, one of which is that the trust cost in the field of criminal investigation is very high, requiring more mature and stable techniques.

Generally speaking, being a little clumsy is not a problem. Techniques that can steadily complete tasks are the ones that the field of criminal investigation likes.

Wei Zhenguo initially accepted Jiang Yuan's techniques and experienced his direct interrogation methods with suspects. Now, hearing about the plan to search one by one, he was a bit dazed.

"Investigation is my old profession." Wei Zhenguo laughed and touched his oily hair. His eyes became fierce. "Okay, I'll deal with these ex-boyfriends."