- When Huang Qiangming came to the forensic office, his mind was still a bit slow.

He asked Jiang Yuan to work on the cold cases, but the usual process of working on cold cases is not like this.

To be realistic, if the provincial department now launches a "100-day Cold Case Action" or something similar, by the end of the action, some pre-prepared cold cases cannot even be started.

Criminal suspects will not cooperate with the police.

And when a current case becomes a cold case, there are always some difficulties, even if there are none, there are hardly any opportunities to find clues from cold cases.

Being a detective, working on cold cases is always a complaint. In some places, being assigned to work on cold case investigations is as painful as wearing tight shoes. In reality, it is indeed very painful.

It's like being a salesperson, trying every way to close a deal with a customer. If it doesn't work, can you switch to another salesperson and get it done? Most likely, it still won't work... This is a regular sales situation.

Huang Qiangming did see Jiang Yuan's abilities, but Jiang Yuan had just come back for half a day and there were already results. Huang Qiangming didn't quite understand. Normally, it takes several months for a regular person to clear the land. It takes time, effort, and resources to get results. Isn't it normal for a cold case to take three to five months to start?

To finish it in just a few hours, there must be something wrong with them. It's not like a steak that can be cooked quickly.

"What evidence have you found?" Huang Qiangming entered the room with a serious face. Although he was indeed curious, he had to maintain the dignity of the team leader. If the leader loses their dignity, how can they manage their subordinates?

"Let Jiang Yuan tell you what he found." Wu Jun didn't want to take credit. He didn't have to worry about dignity anymore. He had already secured his position as a deputy chief and had no desires or demands before retirement.

While waiting for others, Jiang Yuan had already prepared the pictures and directly turned them into a PowerPoint presentation. He turned the screen and said, "It's the 611 He Jingqin case from 13 years ago... Oh, I remember, the scene was covered in blood."

"Yes, based on the bloodstains, I reconstructed the crime scene." Jiang Yuan operated the PowerPoint with his left hand and made gestures with his right hand. Wu Jun smiled on the opposite side. Hearing this, he was surprised and asked, "When did you reconstruct the crime scene? Did you do it while making the PowerPoint?"

Jiang Yuan replied, "I did it while making the PowerPoint."

Bloodstain analysis is a high-level skill. To master it, you need to be at level 3. However, for Jiang Yuan, who has mastered bloodstain analysis at level 5, reconstructing the crime scene is very basic. He had seen all the necessary pictures and had all the required information. It was just a process of integration and analysis.

Jiang Yuan didn't waste time and quickly showed several photos. He then said, "I won't go into detail about the crime scene investigation and the autopsy report. I will directly talk about the reconstruction of the crime process."

"From the bloodstain analysis, the killer's crime process can be divided into four parts."

"The first part: the killer abducted the victim and started to harm the victim at the position of the fire door. The victim's arm had superficial scratches, indicating a low-intensity defense. The bloodstains on the wall behind the door were likely caused by pushing. The main evidence includes: A. Bloodstains flowing from top to bottom on the victim's clothes. B..."

"The second part: the killer took the victim to the rooftop. The victim probably understood the killer's intention and resisted more fiercely. There may have been shouting. The killer, holding a knife in his right hand, made a fatal cut from left to right on the victim's neck, resulting in splatter bloodstains... Then, the killer dragged the victim onto the rooftop, causing dragging injuries and some resistance... The main evidence..."

"The third part: the killer stabbed the victim again on the rooftop, causing the victim's death. The main evidence includes: A. Flowing blood. B. Formation of a blood pool... C. Footprints of the victim... D. After the victim fell, there were splatter bloodstains again."

A quick look at bit.ly/3iBfjkV will leave you more fulfilled.

"The fourth part: the killer started to clean up the scene. Mainly, the killer cleaned up the blood pools on the ground and closed the door to the rooftop. I believe this was to conceal the crime scene and avoid early discovery. From this, I deduce that after committing the murder, the killer's first consideration was to escape. The main evidence includes..." Huang Qiangming was stunned. He was the captain of the county criminal investigation team.

Seeing the crime scene reconstruction, which described the actions of the criminal as if he had witnessed it himself, was something he had only seen in performances before. "Where did you learn this?" Huang Qiangming couldn't understand.

After two seconds of silence, Jiang Yuan said, "I was always interested in these things when I was studying."

"Well, you've really figured something out." Huang Qiangming didn't know what to say. It was like leading a cow to work, but then the cow did all the work of a production team. As the team leader, what should he do now? Jiang Yuan said, "I looked at the previous case files mainly from the perspective of the victim's family background to find the killer. I think, by changing the investigative angle, there may be a chance to solve the case..."

A repeat offender who runs away after committing a crime? This is a big possibility," Huang Qiangming instinctively looked for loopholes.

The cold case was activated, and in an instant, several police officers may have to be assigned to it. It would take several months for the investigation, and the initial argumentation is essential.

Jiang Yuan then explained his previous deductions based on the footprints, saying, "I think we can narrow down the scope first, and if it doesn't work, then consider expanding it." Huang Qiangming asked, "How do we narrow it down?""I believe we can assume that the murderer has a history of sexual offenses and was released not long ago, perhaps within one or two months, no more than three months. Moreover, he fled quickly, probably leaving on the day of the crime, at the latest the next day," Jiang Yuan explained. "Why was his release time so short?" Huang Qiangming thought this was the most important question.

There are only a few prisons in the province, and adding the criminals from Shoutai County, the number of sexual offenders released within three months before the crime should be quite small. It might be just a few people. Among such a small group, finding someone between 25 and 30 years old would narrow down the number even further.

After carefully choosing his words, Jiang Yuan turned off the PPT and pulled out a few photos. "From my understanding of the crime scene, the murderer's actions were quite composed. However, I believe there was a sense of urgency and unfamiliarity. He was bold, confident during the crime, but also quite anxious..."

At this point, Jiang Yuan was making an overall judgment, not just point-to-point deductions. "I think this was the murderer's first crime after being released, which is why he seemed particularly... impatient."

Huang Qiangming understood, although he himself didn't know much about bloodstain analysis. But since Jiang Yuan had analyzed it to this extent, Huang Qiangming had no choice but to believe him.

"You guys start the investigation. I'll find a couple of people to help you." Huang Qiangming thought for a moment, then called Wei Zhenguo over. If Jiang Yuan had found fingerprint or DNA evidence, Huang Qiangming would have immediately set up a project team. But for bloodstain analysis, Huang Qiangming wanted to send out two detectives first.

This was a standard procedure in the criminal police team. It wasn't that they were treating Jiang Yuan specially. All Jiang Yuan wanted was this. Once Wei Zhenguo arrived, they discussed and started making calls. Prisons are managed by the judicial system, especially those outside the province, which are more troublesome. However, this trouble didn't last long. Two days later, a list of only eight people was placed on Huang Qiangming's desk.

"Are there only these few suspects?" Huang Qiangming's level of concern was instantly raised.

Jiang Yuan nodded, "On this list, the first four people are the most likely. The last four could have been screened out for now. But Captain Wei believes there's no need to narrow down the scope so much..."

"Old Wei is right, let me call some people over." Huang Qiangming stopped reviewing the files at hand and directly called for the staff to summon people.

During the waiting period, Huang Qiangming said, "A list of murder case suspects, what's eight people? Even eighty people can be directly investigated. For such cases, we're not afraid of alerting the suspects. With eight people, we should allocate enough manpower..." "Yes," Jiang Yuan, who had experienced several interrogations and arrests, knew what the situation was like.

Police work is not a game, they won't wait until everything is ready and the only result is screened out. The four squad leaders and deputies were called over in one breath and went straight to the conference room. "Jiang Yuan, you'll brief everyone on the case later." Huang Qiangming said as he got up to go to the conference room. Jiang Yuan was also ready.

Whether they were arresting eight or four people, the specific details of the case had to be informed to the executing police officers. Arrests always carry a certain degree of danger, so it's necessary to provide essential information.

Once in the conference room, Jiang Yuan again displayed the PPT, single-handedly operating it while reconstructing the crime scene in a more complete way. Compared to the time he explained to Captain Huang Qiangming, Jiang Yuan was better prepared this time and his narration was more comprehensive. The squad leaders and deputies, all veteran criminal police, were speechless after hearing Jiang Yuan's case report. "Are we going to do this for all future cases?" After a long time, Wu Junhao from the first squad couldn't help but speak up.

"Of course not." Liu Wenkai, the leader of the second squad, sighed, "No matter how well we do, we won't be able to take over the market from the Feng Building. Don't worry."

Everyone inexplicably agreed and felt a sense of relief.