Chapter 504: A Good Start

Jiang Yuan paced lightly on the plank bridge, thinking about how to conduct the investigation next.

This investigation is very different from the past.

The investigation must be detailed, otherwise there will be fish that slip through the net.

But the area is so large, and if the investigation is too detailed, it may delay the opportunity. The news of Huang Li's drug trafficking gang's arrest here should not have spread too widely, but it will eventually spread. By then, the suspects will run away directly, and the evidence will be easily wasted.

Because there are a total of six floors, plus a basement, all of which are the focus of the investigation, the plank bridges of Changyang Municipal Bureau are not enough, and a batch of them have to be purchased temporarily.

The plank bridge under Jiang Yuan's feet is the most suitable acrylic, which is often made of a kind of plastic material used in fish tanks. It is transparent and strong. People weighing more than 200 pounds will not be crushed when carrying equipment or carrying corpses.

If it is translucent, it will be convenient for Jiang Yuan to reconstruct crime scenes or do blood analysis.

Of course, acrylic board bridges are also the most expensive. Changyang Municipal Bureau used to buy a little every year and saved some, but now they have become less for various reasons. Although a batch was purchased urgently, in order to control costs, only the sixth floor was fully covered with transparent board bridges. The board bridges downstairs were mostly metal, so they were covered.

Jiang Yuan walked on such a board bridge, constantly thinking about the survey plan.

Huang Li's office is the top priority of this survey, but it is more than 200 square meters, with huge desks, sofas, chairs, wine cabinets, filing cabinets and safes. Calculated by surface area, the workload is overwhelming.

Not only that, this is also the office where Huang Li's drug trafficking gang fought to the end. They persisted in the room for a short period of time, burned some documents, washed away some drugs, and finally tried to set fire, but it was extinguished and only burned the curtains on one wall.

Therefore, it is basically appropriate to describe this office as devastated.

On the other hand, this office is also valued by the Changyang City Criminal Science Center.

The organization of the Criminal Science Center of Changyang City is comparable to that of the Criminal Police Brigade. More than half of the manpower is concentrated in this main building, and more than half of this half works on the sixth floor.

Therefore, the scene on the sixth floor has actually undergone a round of investigation.

The second investigation also needs to find decisive evidence, which is almost an impossible task.

However...

Jiang Yuan thought about it and said that if there is any advantage of the second investigation, it is that there is no mandatory task.

There are standards for the first investigation. The fingerprints that should be extracted, the biological samples that should be extracted, and the photos that should be taken must not be missing.

These are not only the basic resources for the criminal police to solve the case, but also important information for subsequent investigation or error correction, and they will be used in the end when the prosecution is made. Therefore, any on-site investigation, trace examination, or forensic examination has tasks and standards when doing a first investigation.

But there is nothing to say about the second investigation. If you find something new in the investigation, it is your ability. If you can't find it in the investigation, it is normal.

For Jiang Yuan, he doesn't have to follow the routine to take fingerprints, footprints, bloodstains, etc.

Look first, and if you think it is unnecessary, you don't need to collect fingerprints or footprints - this step will save a lot of time, and it is also the most time spent by investigators.

As for how to judge whether it is necessary or not, this requirement is high.

In theory, different footprints and fingerprints actually have distinct signs, but it is too difficult for ordinary people to remember them. Even after training, if they are not sensitive to the relevant information, it may not work.

From Jiang Yuan's experience, skill levels above LV4 are more suitable.

For example, footprint learning has recently been upgraded to LV5, which is still a bit easy.

Of course, if it was used yesterday, the combat power of LV6 would probably be more effective.

In any case, after determining the plan, Jiang Yuan started to implement it without saying a word.

No matter how good the design and ideas are, it will not work without practical work. Just like the configuration of the protagonist group in American dramas or Hollywood movies, there is always a silently dedicated and powerful technical geek, who is often Asian, and then the protagonist, although unlearned, still plays games and is always successful...

The real world is obviously not so weird.

In reality, criminal technicians with decisive strength will become the leaders, just like the eight criminal investigation tigers of the ministry, who are basically experts in various fields. When they go out to solve cases, they basically command local criminal police to investigate and solve cases.

Jiang Yuan first looked through the fingerprints and footprints collected by others.

Through these fingerprints and footprints, the anti-drug detachment has arrested more than a dozen fish that have escaped the net. They are basically the backbone members of Huang Li's drug trafficking gang.

If you are not a backbone member, you can't enter this six-story building.

Jiang Yuan sorted out some fingerprint characteristics information, memorized it carefully, and then slid around in Huang Li's luxurious office with an exploration lamp.

He was holding a multi-light source and multi-color temperature exploration lamp with lithium battery. In simple terms, it is an exploration lamp that can illuminate multiple colors.

He was also carrying a large version of the footprint lamp, which means the same as the fingerprint lamp, but it is heavier than the fingerprint lamp or similar strong light flashlight. The advantage is that the light source is comprehensive, and more fingerprints and footprints can be seen, and the effect is better.

Mu Zhiyang, who was already a little drowsy, ran over and helped hold the footprint light.

Jiang Yuan then picked up a new set of fingerprint powder and brushes. There are many ways to colorize fingerprints, including but not limited to various fingerprint powders, 502, pyrinone, etc. In theory, they can also be used Gold is used to shape the body, but it is not important to determine the fingerprint, so there is no need for Jiang Yuan to bother.

Most of the fingerprints in the room were actually duplicates. The previous fingerprint detectors have taken them, and there are basically any fingerprints in the backend database that can be matched.

If you can't compare, there is a high probability that there is nothing in the library, and it doesn't make much sense for Jiang Yuan to take it out.

Therefore, Jiang Yuan did not search in conspicuous places, such as office desks, safes, etc. His fingerprints must have been rubbed over and over again.

Of course, this is because the big office is highly valued, and the density of other trace inspections is also high. There is no need to go down to the sixth floor. After leaving the big office, the level of detail of the trace inspections is very low.

Despite this, Jiang Yuan checked the big office first today.

In addition to fingerprints, he also noted footprints and other marks, including those from gunshots.

It was not until dark that Jiang Yuan finally found himself next to a water dispenser, uncovering most of the unfamiliar fingerprints.

I easily clicked on 13 feature points, and after running twice in the background, a 22-year-old young man came out.

Jiang Yuan marked it in the background while taking pictures with his mobile phone and sent them to Deputy Captain Jin of the Anti-Narcotics Detachment.

There is a high probability that he is a middle-level cadre of Huang Li's gang, perhaps a distributor, or perhaps their bodyguard.

Jiang Yuan didn't need to distinguish. It is also good for the drug gang to seal this building tightly. Every fingerprint found here has a high probability of being innocent.

In other words, every fingerprint in this building must first be labeled as guilty. Even the cleaners and housekeepers in the building cannot know anything about what is happening in the building.

After doing this, Jiang Yuan turned around and said, "Let's go back to eat. We'll stay at the police station tonight."

Mu Zhiyang and Lu Tongda were exhausted from carrying things, so they responded repeatedly.

Instructing the people left behind to pay attention to their safety, Jiang Yuan returned to the corner of the office of the criminal police detachment. After setting up a camp bed for himself, he settled down and looked at the fingerprints and footprints in the background to facilitate the continued investigation tomorrow.

Mu Zhiyang gave Lu Tongda a camp bed and placed the bed next to Jiang Yuan. He sighed again and said, "You said, the three of us together are worth at least one unit, but we ended up sleeping in three 99 beds. bed."

"Are these three beds only 99? Is there a link?" Lu Tongda's eyes lit up. He was a single man. If he put a camp bed in his work, a camp bed in his car, and a camp bed in the living room, wouldn't his life be sublimated?

Mu Zhiyang coughed twice: "That's an exaggeration. Buy two get one free, which adds up to one hundred and seventy-eight. Understand the spirit."

"That's not bad, what are the keywords?" Lu Tongda let himself go and started playing with the shopping website. After placing an order, the local tycoon's appearance even surpassed Jiang Yuan's.

…

early morning.

Jiang Yuan sat up smelling the strong scent of sandalwood.

"This smell...is a bit familiar..." Jiang Yuan washed his face with mineral water, wiped it with tissue paper, and then walked out of the office.

The door to the room opposite was open, and there was a little fragrance lingering.

When Jiang Yuan entered, he saw a more familiar pot of red eggs, red duck eggs, red goose eggs... and a green emu egg in the middle.

"Master." Jiang Yuan shouted.

Wu Jun turned his back to the door, beckoned, and said, "Come here and help me take a look at this."

Jiang Yuan walked over quickly and saw a sweeping robot in front of Wu Jun. At this time, his naked body was exposed on the table.

"This is?"

"I bought it second-hand online. I want to take it home and give it a try. They say the sweeping monk is a sweeping monk. We believe in Sanqing, so we have to do the homework of sweeping the floor."

Jiang Yuan asked hesitantly: "Does sweeping the floor with a sweeping robot count as homework?"

"Of course it counts. The great monk sweeps the floor with a broom and mops the floor. Aren't they borrowing tools? Now in the new era, the tools have evolved into sweeping robots. Using sweeping robots to sweep the floor should naturally count as homework...and , I’m not doing nothing, I’ve been fixing this thing all morning.”

"Okay...by the way, can we trust Sanqing?"

"Of course you have to believe it, this is what the higher-ups advocated," Wu Jun said with his fingers: "Alarm alerts are cleared every day, warehouses are cleared every month, and accumulations are cleared every season - our Ningtai County is now one of the three counties in Shannan Province. Quite typical.”

What could Jiang Yuan say, he could only peel a red egg for breakfast.

"Is the injury serious?" Wu Jun asked, pouring him a cup of tea.

"It's a slight concussion, a few bruises on the leg, a slight strain on the left arm, a few minor strains, nothing more, just a minor injury at most." Jiang Yuan explained in a little more detail.

Wu Jun nodded as he listened. If this was indeed the case, then the injury was not serious.

"Fortunately, you are usually obedient and have paid all the thanks." Wu Jun thought for a while and then said: "Okay, you can do whatever you need to do, I will help you speak here."

"Say...what?" Jiang Yuan hesitated.

"Then will you stay and listen?" Wu Jun asked back, taking on the posture of a master.

"No, no, no." Jiang Yuan quickly shook his head.

"Let's just say, it's not easy for you to work in Changyang, even if you are very capable. Just do whatever you have to do, as long as I'm here." Wu Jun took out a palm-long peach wood sword and lightly Place it gently on the table and close your eyes slightly.

Jiang Yuan didn't dare to say more, so he took a few eggs and left.

After returning to the office, he gave the eggs to Mu Zhiyang and Lu Tongda, packed up a little, and went straight to the crime scene in Shuidong.

Because he had checked Huang Li's office last time, this time, Jiang Yuan chose the basement first.

When he entered, he saw several broken mechanical parts piled up at the door. The battle in the basement was still quite fierce. The equipment of the police and armed police could already destroy most of the scene items in the urban battle.

Jiang Yuan subconsciously picked up a piece of mechanical parts. This was a curved water pipe with a broken end at one end and a small part screwed on the other end.

Jiang Yuan couldn't help wondering if there would be fingerprints or DNA missing at the connection between the parts and the water pipe.

He immediately unscrewed the threaded structure between the two.

When he shone it with a light source, a fingerprint actually appeared.

"A good start!"

Mu Zhiyang, who had eaten a belly full of red eggs, shouted immediately.

Jiang Yuan's eyes also lit up. This fingerprint was very likely left by the installation master. In the basement of the building where Huang Li's gang was located, the only thing that needed to be installed by a technician was the drug-making machine.