civil forensic

Chapter 1166 Is there any evidence?

Chapter 1166 Is there any evidence?

Jiang Yuan and his companions arrived late. They were the seventh team to arrive for support, with three more teams queuing up behind them.

Among them, at the forefront are the Changyang City Criminal Police Detachment, Shuidong District Bureau and other large criminal investigation units in Changyang, followed by the provincial department's Criminal Investigation Corps that came to support, as well as the criminal police team led by well-known experts such as Ge Zhibing and Jiang Yuan.

For normal serious cases, such heavy units may not necessarily take over directly, but will more often provide guidance or support.

But in this case, faced with a murder case directly targeting an academician, units like the Changyang City Criminal Police Detachment can only participate as a part of it.

The direct person in charge of the special case team is the Criminal Investigation Bureau of the Ministry. At this time, several people from the Criminal Investigation Bureau followed the director of the Changyang Municipal Bureau, thinking while listening to everyone's report.

The director walked relatively fast in front of the first few display boards, but walked slower and slower in the latter ones. Obviously, more time brings more thinking, which is true for both parties. To some extent, this is also a brainstorming in the Chinese officialdom, which is serious, restrained and requires a huge amount of brain cells.

Huang Qiangmin waited until the leader's team reached the previous one, and seeing that the whiteboard on his side was still blank, he asked Jiang Yuan: "Do you want to fill in something?"

"What aspect? Oh... a whiteboard? Wait a minute..." Jiang Yuan was actually quite nervous. He was flipping through the pictures quickly.

For a murder case, there are too many photos taken at the scene. It can be imagined that many criminal photographers probably had their hands on the shutter button and never let go.

If there is enough time, it is also possible to select these photos later. Or, it is also acceptable to take a quick look at them.

But if we are rushing for time now, the above options are naturally not feasible.

Jiang Yuan turned the pages desperately but still couldn't finish looking at the photos, so naturally he didn't have time to analyze anything on the whiteboard.

His methods of solving cases are different from normal criminal investigation methods. Normal criminal police usually start by analyzing the case. For a typical murder case, the first thing to do is to analyze the criminal's activities at the crime scene, how he entered the scene, how he killed people, whether there was interaction and struggle between the two parties, whether the victim resisted, whether the criminal was injured, and finally, how the criminal handled the body, how he left the scene, etc.

In the case of the academician's murder, the murderer's activities at the crime scene were clear, so the investigation could fast-forward to the stage of identifying the murderer.

At this point, two directions naturally arise: to investigate through the murderer entering the scene, or to investigate through the murderer leaving the scene.

According to this idea, when investigating the scene, we can choose to investigate the vehicle. By tracking the ownership and source of the vehicle, we can continue to trace back to see if the murderer has revealed his identity at a certain section of the road, such as revealing his face when passing a certain vehicle checkpoint. Or in a simpler way, the car is the murderer's own, or he recently bought it...

Of course, no one is too optimistic about the origin of the car or the road it is on. If the murderer could be found directly by the car, he would not have to go to the trouble of wearing a ski mask, and he should not even run away. Turning himself in would have made it easier to survive. Relatively speaking.

The way the murderer left the scene also showed some anti-detection awareness.

Leaving by mountain motorcycle, it is not easy to trace the origin of the motorcycle, and the route of departure is also difficult to trace. However, the murderer left the motorcycle here in advance, which means that the murderer had scouted and prepared beforehand.

Investigating based on this point may be a breakthrough.

Following this line of thought, the murderer must have visited this place more than once, and may even have visited other places that Academician Lou often visited. If we investigate these places, we may be able to make some breakthroughs.

If you think more deeply, why was the murderer able to wait near the intersection on time? Where did he get the information? Or did he just wait there all day long? This is also a possible idea.

If it is the former, catching the traitor may solve the case directly. If it is the latter, asking the drivers or construction workers passing by, or the nearby takeaway boys or even the takeaway restaurants may be able to directly identify the person.

Jiang Yuan is more focused on looking for physical evidence and then conducting investigations and analyses based on the physical evidence.

From the perspective of criminal investigation, this method is obviously a bit rigid and backward. After all, taking other investigative angles may make it easier to make a breakthrough.

It just so happens that Jiang Yuan is good at this, and he put a lot of effort into analyzing the physical evidence.

It was not until the director was about to come over that Huang Qiangmin urged him again. Jiang Yuan hesitated for a moment, stood up and wrote a line on the whiteboard: Source of the vehicle, cigarette butts.

Before anyone else could ask questions, the director came over.

"Jiang Yuan is here too. I heard that you just solved a major drug trafficking case..." The director said some news he saw on the internal website, then looked at Jiang Yuan's whiteboard and couldn't help but smile: "That's concise. Tell me, what do you think?"

Jiang Yuan glanced at Liu Jinghui and said, "I looked at the vehicle scene and some photos of the vehicle checkpoints. The management of muck trucks is relatively strict. I think there should be some results if we investigate the source of the vehicles."

"Okay." The director nodded. This was not a surprising idea. The previous teams had all mentioned it.

Jiang Yuan said again: "From the current point of view, the murderer should have been waiting at the scene for a long time, and the murderer is a smoker. From the ashes in the cab, we can see that there are ashes but no cigarette butts, which means that the murderer is waiting at the place where he is waiting, and there is a high probability that there are cigarette butts left behind."

The director nodded.

Yu Wenshu, who was standing next to him, explained, "Cigarette butts are already being collected at the scene. However, the wind was very strong that night, and there were many cars parked near where the crime vehicle was parked. It will take some time to determine who the DNA from these cigarette butts belong to."

Cigarette butts are very easy to obtain DNA from, and are one of the police's favorite DNA carriers. However, DNA matching may not be a direct match, and because there are so many cigarette butts at the scene, it may be necessary to check them one by one to confirm the murderer's DNA. This step is a necessary step, but it will definitely not be done quickly.

The director was responsible for being a good person and smiled: "The two directions that Jiang Yuan is considering are both very promising..."

"The last point is the whereabouts of the murderer." Jiang Yuan saved his leader's time and said, "I tend to think that the murderer went to the Northeast."

"Huh?" The director and others who had already looked at six sets of display boards did not expect Jiang Yuan to give such a direct answer. Their bodies, which were about to move, froze for a moment.

The director immediately asked: "Is there any evidence?"

At this time, he needs evidence.