National Forensic Doctor
Chapter 288 - 288 262 Difficult Case_3

288: Chapter 262 Difficult Case_3 288: Chapter 262 Difficult Case_3 For a fingerprint, if it is found on the murder weapon, then its evidentiary value is definitely top-notch, essentially locking down the criminal suspect.

But if it’s only found on the murderer’s means of transport, then its evidentiary value is second-class, and then at the crime scene, if it’s a public space like a coffee shop, where numerous fingerprints can be lifted, external conditions are needed to determine which fingerprint belongs to the criminal suspect.

In fact, DNA is much the same.

Why do police love finding semen so much, and why did Chief Medical Examiner Niu become so familiar with the nature of toilet paper?

It’s because normal people don’t just leave semen everywhere, and when it’s found, its evidentiary strength is very strong.

The Criminal Science Center in Changyang City is quite professional, with a high level of expertise.

They often collaborate with provincial experts, so any unsolved cases have likely already made the rounds through the Provincial Department.

Under these circumstances, the difficulty of fingerprints from Changyang City is relatively high.

Additionally, those submitted to the Provincial Department for expert consultation are at least selected for their very strong evidential power.

Jiang Yuan is now sitting in the office of Changyang City Criminal Science Center, scanning their fingerprints, which are likely to reveal some fingerprints with less evidential value—specifically pertaining to homicide cases.

But if he doesn’t investigate homicide cases, his presence becomes meaningless.

Even if he solves 100 theft cases, even if they’re highly challenging, they won’t be considered significant by the Changyang Municipal Criminal Police Team.

They have many small cases unsolved, perhaps since they’re unsolvable or because resources have not been invested.

But in their eyes, these cases are the kind where “I could score full marks if I were just careful.”

Jiang Yuan’s arrival had only one mission, which was to solve homicides.

Fingerprints could be worked on, but as an opening gambit, Jiang Yuan definitely had to bring out his strongest power.

The LV4 Qingdao Single-Finger Fingerprint Analysis Method + LV3 Chongqing Single Finger Fingerprint Analysis Method + LV5 Image Enhancement is super strong, but not as powerful as LV5 Bloodstain Analysis + LV3 Footprint Analysis + LV3 Forensic Clinical Medicine.

Because fingerprint and image investigation are overt techniques, whereas bloodstain and footprint analyses are, by contrast, the opposite.

Of course, in Ningtai County Bureau, there might be no difference between fingerprint, image investigation, or footprints.

The strongest trace evidence expert in Ningtai, Yan, had fingerprint skills that barely reached LV0.9.

But in Changyang City, there are at least LV3 fingerprint experts, whom Jiang Yuan had seen during the fingerprint conference.

In terms of image investigation, their greatest capability might be only LV2, but when doing fingerprints, the main strength still comes from fingerprint skills, with LV5 Image Enhancement acting as an assistant.

Switch to bloodstain analysis + footprints.

These two skills were evident 20 years ago, being the forte of the older generation of criminal investigators.

But now, they cannot be said to have been lost; rather, they are used less and less.

Even if master teaches apprentice, without sufficient material, it’s impossible to rise.

In effect, if fingerprints are considered, the Changyang Municipal Criminal Police Team could form a team and consult experts equating to a force that could match Jiang Yuan’s strength.

Normally they might fall a bit short, but with homicide cases, they wouldn’t lose by much.

And the fingerprints they can’t work out, Jiang Yuan cannot guarantee that he would be able to either.

But switch to bloodstain analysis + footprints, and the scenes they can’t solve might just be a piece of cake for Jiang Yuan.

Meaning, for fingerprints + Image Enhancement, Jiang Yuan might score 800 points, while the Changyang Municipal Criminal Police Team could form the strongest battle group and score 700 or 750 points, even potentially peaking at 800 points.

But on the route of bloodstain analysis + footprints + forensic clinical medicine, Jiang Yuan still scores 800 points, and the Changyang Municipal Criminal Police Team, even if they scour the entire province to form the strongest battle group, would only rack up slightly over 400 points, at most reaching 500 points.

When solving homicide cases, although it’s not a battle against one’s own, for unsolved cases, it only makes sense if you are stronger than your own team.

Otherwise, if everyone has similar strength and they can’t solve current cases, on what basis could you solve cold cases?

The thing is, there just aren’t many cases involving bloodstain analysis + footprints anymore, otherwise masters would not fail to pass on their greatness.

But Jiang Yuan believes that in a large city like Changyang, there are always some perverts who think they are unique, while other unique perverts, are actually just the same kind of perverts.

“See if you have such a category of cases.

Scenes with a lot of bloodstains, blood footprints, and the scenes extensively photographed,” Jiang Yuan briefly described.

“This kind of direct violent crime is now not common,” Wan Baoming said first, then asked, “Does Doctor Jiang have a particular insight into these types of cases?”

“I would be more confident,” Jiang Yuan stated as he walked towards the computer.

Wan Baoming gave a smile, walked over to turn on the machine, and went straight to the point, “The 513 Stabbing Murder Case.

Shall we start with this one?”

A case that could be named directly was undoubtedly a serious, complicated, and difficult case.

Jiang Yuan asked, “What is the specific situation?”

“Let me give a brief introduction,” Wan Baoming responded, “It happened three years ago, on May 13th.

The victim was a local retired villager living alone.

Someone knocked on the door to read the electricity meter, the old man opened the door, and without any argument, was stabbed directly in the chest.

The death was silent.

The body was discovered by a neighbor, already dead for over an hour.”

Wan Baoming looked at the solemn-faced Jiang Yuan and Wei Zhenguo, continuing, “Footprints were extracted from the scene, along with a large amount of bloodstain evidence, and half a bloodied footprint, but due to neighbors and onlookers, the evidence at the scene was quite chaotic.

What do you think of this case?”

“This case seems excessively difficult,” Wei Zhenguo exclaimed, afraid that Jiang Yuan would rashly agree to handle it.

“Let’s look at the scene photos first,” Jiang Yuan made way for Wan Baoming to access the internal network.