The meaning of Luo He's words is very clear. This is a small case, and the Criminal Technology Section of the Municipal Bureau may not necessarily buy it.

It's not that the police officers in the Criminal Technology Section like to be lazy, it's just that they are simply too busy.

If it were a small case like this, if you gave them a cigarette butt, they would have to test it and compare it, and these otakus would not be able to sleep.

What's more, Luo He was still skeptical about the value of this cigarette butt.

Mu Yuan also understood the meaning of Luo He's words and was slightly stunned.

It's not that he's worried that the Criminal Technology Laboratory won't test it, but what's the use of it once it's detected?

If there happens to be a successful match in the DNA library, everyone will be happy. But what if there is no match?

Should we conduct blanket investigations? Carry out large-scale blood tests for comparison? Or should we wait and wait for the suspect to have his blood drawn after committing a crime elsewhere, and then successfully solve the case?

No matter which one it was, Mu Yuan felt it was unreliable.

"It's better to take it back first." Mu Yuan said, "Is there an evidence bag in the car?"

"Yes!" Luo He nodded.

A few minutes later, the evidence bag was obtained, and Mu Yuan put the cigarette butts in it using the unprofessional method of wearing gloves and chewing chicken feet.

This is also a helpless move. When the police station is handling police, you can't expect their equipment to be as complete as that of criminal investigation. It would be good if you don't leave your fingerprints on it.

Mu Yuan then walked around the surrounding area again. When Luo He didn't understand the situation at all, Mu Yuan said "go home" and got into the car.

…

Sitting back in the car, Mu Yuan fell into deep thought.

After wandering around for so long, whether it was the cigarette butts he identified through trace inspection technology or the breath he smelled through his nose, he could at least determine several aspects of the situation.

First, there is only one perpetrator.

Second, the perpetrator smoked and was an old smoker.

Third, the route the perpetrator took away from the scene.

Through the above circumstances, Mu Yuan basically ruled out the possibility that last night's car smashing case was caused by the so-called problem of the previous group of troubled teenagers.

At the same time, he concluded that the perpetrator was probably an adult.

The reason is very simple. From a psychological point of view, minors usually do bad things in groups. Only adults can do this alone.

Moreover, in the middle of the night, a single minor does not dare to wander on the street alone.

However, these inferences still need to be supported by some realistic things. After all, when there is only one suspect, you can sniff it out through your nose. Before you are ready to be a police dog... Uh, bah! Before you are ready,

Before being treated as an abnormal human being, he had no intention of telling anyone about this situation.

Fortunately, it's easy to get clues to support this conclusion, just watch the surveillance.

When Mu Yuan and the others returned to Qinglong Street, only three of the victims had arrived, including the boss who had a box of Okamoto 001 hidden in his car at all times.

As for why the other victims didn't come over, it's actually conceivable...

At this time, the director and the instructor went to the branch for a meeting. Deputy director Liu, who was in charge of case investigation, and squadron leader Ding Mao of the case investigation squadron were both on business trips, so only deputy director Zhao was left in charge.

Arranging people to take notes on the victims, directing and dispatching police work, it is a great time to have fun.

The only thing he didn't want to interrupt was the investigation of the case, so he told Mu Yuan: You are responsible for handling it, and stopped interfering.

Mu Yuan was also happy that no one was supervising him, so he hurried to the monitoring room alone.

This time, Li Xiang and Yue Fei were both in the monitoring room. When they saw Mu Yuan come in, there was deep admiration in their eyes.

666, The boss came to see the surveillance again! The boss wants to arrest people again!

I wonder which new criminal suspect is trembling under the clutches of the big boss...

"Brother Li, please call out the surveillance at the south end of Sixun Street. The time is about 4 to 5 in the morning."

"Okay!" Li Xiang responded happily.

It didn't take more than a minute for the scene of Sixun Street to appear on the screen.

What the surveillance camera shows is a picture of the sidewalk. Under the dim street lights, everything looks blurry, especially under the tall street lights. The trees on both sides leave mottled shadows. Even if someone does walk under the surveillance camera, they can't see it.

Look at the other person's face.

"Brother Mu, are you going to watch it like this for an hour? Do you want to fast forward? Even if it is played at eight times speed, someone passing by under the surveillance camera will still be able to see it."

Mu Yuan shook his head and said, "The suspect did not pass by the surveillance camera."

Li Xiang: o((⊙﹏⊙))o, you didn’t pass by the surveillance? Then what kind of surveillance are you looking at? Is your brain crazy?

After asking three questions, Li Xiang looked at Mu Yuan who was staring at the screen with a serious look on his face. He felt as if he had discovered some great secret.

Watching surveillance is the most boring job, especially watching surveillance that cannot be fast-forwarded. The boring waiting can make people doubt their life.

What does this feel like? It's as if you clearly have a happy present, but you have to force yourself into the past that cannot be changed...

But Mu Yuan didn't seem to be bored. He looked at every detail in the picture attentively, as if trying to find the ghost floating by in the mottled tree shadows!

I don’t know if it was a ghost, but after watching it for nearly half an hour, Mu Yuan suddenly hit the space bar.

pause!

Single frame rewind...

One frame, two frames...

Li Xiang and Yue Fei also stretched their heads and stared at the screen, trying to see what was on it.

But in the end, not even a fly flew across the screen.

"Could it be that Brother Mu's eyes have been opened and he can see things that ordinary people can't see?" Yue Fei thought, and suddenly felt a sense of panic.

Li Xiang glanced at Mu Yuan even more suspiciously: "I heard that mentally ill people can see things that others can't. It seems to make sense."

Fortunately, Mu Yuan doesn't have the ability to read minds, otherwise he would probably cry in anger.

He is still watching frame by frame...

Yue Fei finally couldn't help it anymore and asked, "Brother Mu, what are you looking at?"

Mu Yuan smiled slightly, with an inexplicable light in his eyes, and said, "Look at the ground! Look carefully at this area."

As he spoke, he moved forward in a single frame.

Yue Fei smiled bitterly and said: "This...is nothing, okay?"

As soon as he finished speaking, Li Xiang exclaimed, "Shadow! A shadow passed by here."

Yue Fei had goosebumps all over his body.

What you're watching is surveillance in the middle of the night. You said a shadow floated past. Isn't this too scary?

Mu Yuan said calmly: "That's right! It's a shadow. And it's the shadow of a person."

Yue Fei looked carefully again, and sure enough he saw a very blurry shadow passing from the corner of the surveillance camera.

Judging from the surveillance point of view, this figure should have been produced by someone walking across the road and projected by the street light on the opposite side.

After understanding this truth, Yue Fei no longer felt scared, but his doubts were not resolved, and he immediately asked: "What is the use of this...?"

Mu Yuandao: "Of course it has its uses. This can basically confirm that the car smashing and theft case that occurred on Sixun Street last night was a separate crime. At the same time, it can also pinpoint the suspect's exact time of committing the crime."

Yue and Fei were stunned for a moment, and after thinking about it carefully, it seemed to be the truth.

The two of them were overjoyed, and they learned another trick!

As people who specialize in surveillance, their most useful ability is to discover suspects from surveillance videos, because this is directly linked to their bonuses.
Chapter completed!