Diary of a Criminal Investigator-Chapter 291: Busy Investigation

Wu Kaiyue hasn’t slept all night.

As the captain of the Image Investigation Brigade, Wu Kaiyue’s work isn’t usually that busy.

The Image Investigation Brigade has developed rapidly in recent years, lacking neither people nor money.

Although the promotion path for Wu Kaiyue as the captain isn’t that wide, he’s in a better position than most.

Ordinary cases usually don’t catch his attention.

But the traffic accident that happened yesterday was different, Qin Yong personally called him, insisting on retrieving the full video of the deceased’s appearance.

The higher-ups gave a strict order, and Wu Kaiyue, along with his elite team, toiled all night with little to show for it.

In Chen Kun’s office, the top expert of the Image Investigation Brigade.

For high-profile cases like this, Chen Kun is undoubtedly the main force of the Image Investigation Brigade.

At this moment, several team leaders are also in the meeting room.

"Teams one and two have already checked all thirteen intersections and three hundred twenty-eight cameras along Binzhou Road last night."

"We couldn’t find any footage of the deceased in these monitors, so the person likely didn’t come from the Binzhou Road direction."

Image investigation work is essentially finding a needle in a haystack, sifting through an enormous amount of surveillance footage for those few seconds of critical footage.

"How’s it going on Yingbin Road?"

The incident occurred at the intersection of Binzhou Road and Yingbin Road. Wu Kaiyue divided his teams into two groups, one to thoroughly inspect all surveillance footage along Binzhou Road.

The other group focused on inspecting all the surveillance footage along Yingbin Road. 𝙛𝒓𝒆𝙚𝒘𝒆𝓫𝙣𝓸𝙫𝓮𝒍.𝒄𝒐𝓶

"No significant findings on Yingbin Road either. We went through all twenty-one intersections and four hundred nineteen cameras, inspecting footage half an hour before and after the incident, and found no footage of the deceased."

Still no findings, nothing at all.

Wu Kaiyue sighed deeply, looking around: "Everyone, share your thoughts, whatever ideas you have."

"Chen Kun, you go first."

Chen Kun extinguished his cigarette: "I’m in charge of the technical aspects. I enhanced some unclear videos from yesterday."

"But still, I found no footage of the deceased."

"I believe our surveillance inspection did not miss anything; the person didn’t show up in the footage, not due to our oversight, but because they genuinely weren’t captured."

"Yes, I agree with Old Chen."

One of the team leaders spoke up: "The deceased might have arrived at the intersection not on foot, but perhaps by vehicle."

"The flow of people at the junction during the incident was quite low, and so far, no eyewitnesses have been found."

"Therefore, I think we can start investigating the vehicles passing through the intersection around the time of the incident; we might uncover something."

Wu Kaiyue had thought of this, of course.

To pinpoint how the victim arrived, checking the closest surveillance footage from the intersection of Binzhou and Yingbin Roads for any sign of the target should suffice.

Expanding the investigation is just a precaution.

"Any other opinions?"

Everyone looked at each other.

Having stayed up all night, everyone now looks like pandas, and indeed, the target hasn’t shown up in the surveillance.

And inspecting vehicles—that’s beyond the realm of image investigation.

"Alright, I’ll report to Captain Qin."

Wu Kaiyue felt that the presence of the Image Investigation Brigade seems to be diminishing lately.

In past cases, most direct leads were provided by the Image Investigation team.

But recently, the Crime Scene Investigation side is clearly standing out more than the other teams.

Taking a deep breath, Wu Kaiyue dialed Qin Yong’s number.

"Captain Qin, it’s me, Wu..."

The results that Wu Kaiyue reported did not surprise Qin Yong.

He had already prepared for this; the killer’s method of killing Sun Hao was so discreet, how could they not have considered the surveillance cameras?

So, the vehicle investigation had already begun.

An hour before the incident, all vehicles that passed through the intersection have been identified.

Now, Sun Jun and their team are investigating these vehicles.

However, what will be discovered through such extensive investigation is still uncertain.

Therefore, Qin Yong also assigned a team led by Ren Qiang to mainly investigate Sun Hao’s social background.

Sun Hao was killed in such a covert manner; what was the killer’s motive?

Moreover, Sun Hao’s body contained indoleamine substances, something an ordinary person cannot easily access.

Does this relate to the suspect’s profession?

A doctor?

A pharmaceutical worker?

How could Sun Hao, an engineer, get involved with such people?

It’s been thirty-six hours since the incident occurred.

Aside from the clear results from the Image Investigation team, the other groups have not yet returned.

"Did you see this person when driving through the intersection of Yingbin Road and Binzhou yesterday?"

"Um... I don’t really remember. I was driving quite fast, and I caught a green light, so I just sped through."

Sun Jun’s team is currently investigating vehicles passing through the crime scene intersection yesterday.

"Boss, how long is this going to take?"

Sun Jun shook his head; it was a helpless situation.

They’ve narrowed it down to ninety-two vehicles and are looking for each owner based on information provided by the traffic police.

But, asking if they noticed a pedestrian by the roadside as they drove through...

If it were a scantily clad woman, someone might remember.

A middle-aged man...

"Let’s keep investigating; the forensic doctor said the victim’s blood contains hallucinogenic substances, which could cause the person to act erratically. Maybe someone will remember."

Crime Scene Investigation office.

"How’s it going, any results?"

Old Bai brought tea for Lu Chuan: "You’ve been working for over a dozen hours, want to take a break?"

Yes, ever since extracting the trace substances from the deceased’s shoelaces, Lu Chuan hasn’t rested.

He’s been in the underground lab for more than ten hours.

Taking the tea, Lu Chuan stretched his neck, which cracked audibly: "No worries, I’m almost done. Just a dozen more bags to go."

Lu Chuan was extracting DNA information from the biological materials collected from the shoelaces.

Trace evidence is not only difficult to collect, but the experimentation is also time-consuming.

Now, Lu Chuan has completed most of it, with just over a dozen bags left.

"How’s the fingerprint analysis upstairs going?"

While Lu Chuan was downstairs conducting experiments, there was no time to process the fingerprints collected from the shoelaces.

Liu Guodong and two others have taken them for identification.

Old Bai shook his head: "No luck, the fingerprints are too fragmented and tiny. Not to mention analysis, there are merely one or two feature points."

"When you’re done here, please assist us upstairs. We can’t manage it."

Lu Chuan nodded, aware of the difficulty in identifying those fingerprints since he collected them himself.

"I’ll be done in about half an hour and will head up right away."

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