civil forensic

Chapter 504
Jiang Yuan paced lightly on the Banqiao, thinking about how to do the next survey.

The survey work this time is very different from the previous ones.

It is necessary to investigate carefully, otherwise there will be fish that slip through the net.

But the area is so large, and the survey is too detailed, and I am afraid of delaying the fighter.The news of the arrest of Huang Li's drug trafficking gang here should not have spread too widely, but it will eventually spread. By then, the suspect will run away directly, and the evidence obtained will be easily wasted.

Because there are a total of six floors, including a basement, all of which are the focus of investigation, and the board bridges of the Changyang City Bureau are not enough, so they have to purchase a batch temporarily.

The board bridge under Jiang Yuan's feet is most suitable for acrylic, and it is often made of a plastic material for fish tanks. It is transparent and strong, and a person weighing more than 200 kilograms will not be trampled on carrying some equipment or carrying a corpse.

If the light is transparent, it will be convenient for Jiang Yuan, who does crime scene reconstruction, or does blood analysis and other work.

Of course, the price of acrylic boards is also the most expensive. The Changyang Municipal Bureau used to buy a little every year and save some, but now it has become less for various reasons.Although a batch was purchased in an emergency, in order to control costs, only the sixth floor used transparent slab bridges, and the slab bridges downstairs were mostly metal, so they were covered up.

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

Huang Li's office is the top priority of this survey, but it has 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, but this is also the office where the Huang Li drug 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 they were extinguished and only burned A wall of curtains.

Therefore, it is basically appropriate to describe this office as full of devastation.

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

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

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

It is almost an impossible task to find decisive evidence for the second survey.

but……

Jiang Yuan thought about it again, if there is any advantage in the second survey, it is that there are no mandatory tasks.

There are standards for a survey, 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 in the future, but also important information for subsequent detection or error correction, and will be used in the final prosecution.Therefore, when any on-site investigation or trace inspection or forensic doctor conducts an investigation, there are tasks and standards.

But there is nothing to say about the second survey. It is your ability to find new things in the survey. It is normal that the survey cannot be found.

As far as Jiang Yuan is concerned, he doesn't have to take fingerprints, footprints and bloodstains step by step.

Look at it first, and if you think it is unnecessary after reading it, 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 surveyors.

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

Theoretically speaking, different footprints and fingerprints actually have distinct signs, but it is too difficult for ordinary people to memorize them. Even after training, if they are not sensitive enough to relevant information, they may not be able to do so.

As far as Jiang Yuan's experience is concerned, skill levels above LV4 are more appropriate.

Like footprint studies, recently upgraded to LV5, it is still a little more comfortable.

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

No matter what, after confirming the plan, Jiang Yuan executed it silently.

No matter how good the design and ideas are, it will not work without practical work.It's like in the configuration of the protagonist group in American dramas or Hollywood movies, there is always a silently dedicated and powerful technical nerd, who is always Asian, and then sees that the protagonist is still playing games despite being ignorant and incompetent. unfavorable……

The real world is obviously not so weird.

In reality, criminal technicians with decisive strength will instead become the dominant players, just like the Eight Tigers of the Ministry of Criminal Investigation, who are basically experts in various fields. When they go out to solve cases, they basically direct the local criminal police to investigate and solve cases.

Jiang Yuan first looked at the fingerprints and footprints collected by other people.

Through these fingerprints and footprints, the anti-narcotics detachment has already caught more than a dozen people who slipped through the net.They are basically key members of Huang Li's drug gang.

Anyone who is not a key member cannot enter this six-story building.

Jiang Yuan sorted out some characteristic information of fingerprints, and then memorized them carefully, and then strolled around Huang Li's luxurious office with a survey light.

What he took was a multi-color temperature survey lamp with multiple light sources and lithium batteries. Simply put, it is a survey lamp that can illuminate multiple colors.

He was still carrying a large version of the footprint light, which has the same meaning as the fingerprint light, but it is thicker than the fingerprint light or similar bright flashlights. 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, hurried over to help carry the footprint light.

Jiang Yuan took a new set of fingerprint powder and brushes. There are many solutions to make fingerprints color, including but not limited to various fingerprint powders, 502, ninhydrin, etc. In theory, you can also use Gold is used to shape it, but not to determine important fingerprints, and Jiang Yuan doesn't need to bother.

Most of the fingerprints in the room are actually duplicates.The previous fingerprint checkers have taken it, and there are some fingerprints in the background database, which can basically be compared.

If it doesn't match, the high probability is that there is no storage in Curry, and it doesn't make much sense for Jiang Yuan to roll it out.

Therefore, Jiang Yuan didn't look for it in conspicuous places, such as office desks, safes and the like, where fingerprints must have been wiped again and again.

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

Even so, Jiang Yuan checked the big office first today.

In addition to fingerprints, he also noted footprints and other marks, including bullets.

Until it was dark, Jiang Yuan finally uncovered most of the strange fingerprints next to a water dispenser.

After easily clicking 13 feature points, and running twice in the background, a 22-year-old young man ran out.

Jiang Yuan marked it in the background, took a picture with his mobile phone, and sent it to Deputy Chief Jin of the anti-drug detachment.

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

Jiang Yuan didn't have to tell the difference.It is also good for the drug gang to seal this building tightly. Every piece of fingerprint found here is probably not innocent.

In other words, every fingerprint in this building must first be labeled as guilty.Even the cleaners and aunts in the building cannot be ignorant of what happened in the building.

After finishing this, Jiang Yuan turned around and said, "Go back to eat, and stay at the police station tonight."

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

After telling the left-behind personnel to pay attention to safety, Jiang Yuan went back to the corner of the criminal police detachment's office. After setting up a camp bed for himself, he crouched down to look at the fingerprints and footprints in the backstage, so as to facilitate the continued investigation tomorrow.

Mu Zhiyang gave Lu Tongda a camp bed, put the bed next to Jiang Yuan, sighed, and said, "You said, the three of us together should be worth at least one apartment building, but in the end we slept on three 99 sheets." bed."

"Are these three beds only 99? Is there a link?" Lu Tongda's eyes lit up. He is a bachelor. If he puts a camp bed in his work unit, a camp bed in his car, and a camp bed in the living room, wouldn't his life be sublimated?
Mu Zhiyang coughed and coughed twice: "It's an exaggeration. Buy two and get one free, which adds up to a hundred and seventy-eight. Understand the spirit."

"That's not bad, what are the keywords?" Lu Tongda let himself go, and started to play with shopping websites.Ordering one in a while, the look of the local tyrant even overwhelmed Jiang Yuan.

……

early morning.

Jiang Yuan sat up, smelling the strong scent of sandalwood.

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

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

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

"Master." Jiang Yuan called out.

With his back to the gate, Wu Jun waved and said, "Come here and help me look at this."

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

"This is?"

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

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

"Of course it counts. The great monk used a broom to sweep the floor and a mop to mop the floor. Didn't they all borrow tools? Now in a new era, tools have evolved into sweeping robots. Using a sweeping robot to sweep the floor should naturally be counted as homework... and , I’m not doing nothing, I’ve been working on this thing all morning.”

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

"Of course you have to believe it, this is also advocated by the higher-ups," Wu Jun said, pointing his fingers, "Police cases are cleared every day, cases are cleared every month, and accumulated cases are cleared every season—our Ningtai County is now a typical example of the Three Cleans in Shannan Province. gone."

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

"Is the injury not serious?" Wu Jun asked while pouring him a cup of tea.

"It's a slight concussion. I hit a few pieces on my leg, my left arm was slightly strained, and there were a few minor strains in a few places. It's nothing more than a slight injury." Jiang Yuan explained in a little more detail.

Wu Jun listened and nodded. If it is true, then the injury is not serious.

"Fortunately, you are usually obedient, and you have to pray." Wu Jun thought for a while, and thought: "Okay, what should you do, I will help you talk here."

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

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

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

"Let's just say, it's not easy for you to work in Changyang even if you are capable. You can do what you have to do, and I'll be fine here." Wu Jun took out a palm-length peach wood sword, lightly Put it lightly on the table and close your eyes slightly.

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

Back at the office, I handed out the eggs to Mu Zhiyang and Lu Tongda. After tidying up a bit, I went straight to the crime scene in Shuidong.

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

When I entered, I saw several broken mechanical parts piled up at the door.The battle in the basement is still relatively fierce. The equipment of the police and the armed police can already destroy most of the scene items in the urban battle.

Jiang Yuan subconsciously picked up a mechanical part, which was an angled water pipe with a fracture at one end and a small part twisted at the other end.

Jiang Yuan couldn't help but wonder if there would be fingerprints or DNA missing in the connection position of the parts and water pipes.

He immediately unscrewed the thread structure between the two.

I took another photo with a light source, and a fingerprint appeared indistinctly.

"It's a good start!"

Mu Zhiyang, who had eaten a stomach full of red eggs, immediately cried out.

Jiang Yuan's eyes were also shining. There is a high probability that this fingerprint was left by the installer.In the basement of the building where Huang Li's gang is located, the only thing that needs to be installed by an installer is the poison machine.

(End of this chapter)