The sky has become dark.
Chen Ting's expression in the police car was uncertain under the light.
Xiong Beibei, who was driving in front, and Xu Xin, who was next to Shen Ting, were both a little surprised when they saw this.
Because they rarely saw Shen Ting with such an expression.
“Chen Ting, what’s wrong?”
"The case has reached a bottleneck?"
“I guess so!”
Shen Ting gave an ambiguous answer.
It wasn't the difficulty of the case itself that stumped him.
Instead, he checked the "Fingerprint Analysis" in the skills column and found that the skills provided by the system were unable to identify the fingerprints remaining on the bomb fragments.
You know, before, whether it was trace evidence in the pool of blood, or corrupt spores in the car, etc.
These substances that ordinary technicians cannot identify can be easily identified using the techniques provided by the system.
But this time the fingerprints were different.
The bomb fragments with fingerprints on them were made up of several pieces of black plastic.
Under the high temperature conditions generated by the explosion, the oil, salt and other residues in the fingerprints will penetrate into the micropores of the material and react chemically with the plastic surface, forming a composite imprint with both physical depressions and chemical residues.
Professionally, it is called 3D imprinting.
When extracting fingerprints, it is difficult to extract such fingerprints using commonly used powder and chemical methods, and physical extraction techniques such as microscopic examination are required to be successful.
For this step, there are corresponding techniques in "Fingerprint Analysis", and real-life fingerprint experts can also complete the identification.
The question is!
The extracted fingerprints are severely deformed.
To identify and match the extracted fingerprints, they need to be repaired first.
There are two difficulties in repairing it:
1. The plastic that carries fingerprints is inherently fragile.
All components of the fingerprint are not found, and the broken and incomplete fingerprints need to be pieced together.
2. The plastic that carries fingerprints melts and deforms at high temperatures.
The fingerprint shape above was also severely distorted.
It is impossible to extract enough feature points for matching.
At the same time, this distortion also increases the difficulty of piecing together.
"Being able to find that fingerprint on the broken plastic is already a remarkable achievement for the trace detection team in Miyun District.
It is also possible to use a micro-display to extract fingerprints completely, which is probably something that ordinary trace identification experts cannot do.
But it is extremely difficult to piece together and restore the extracted fingerprints."
The techniques provided by the system can piece together micro-deformed fingerprints on broken materials.
It can also restore complete fingerprints that are severely distorted on high-temperature deformed plastics.
But when the two are superimposed, it is not only incomplete but also severely distorted. Once the buffs are fully stacked, it is impossible to restore them.
"However, it's not like what the experts say, that it's completely impossible to recover successfully."
In the fingerprint analysis provided by the system, even such broken, incomplete and distorted fingerprints can be restored by comparing multiple samples.
"But now, there is only one fingerprint, and no other fingerprints for comparison."
Shen Ting frowned.
It is now basically confirmed that the murderer knew Xu Tuanjie, and his relationship with him seemed to be very good on the surface.
All that’s missing is a more obvious feature of the murderer to help us finally identify him!
Fingerprints naturally have such characteristics.
Unfortunately, fingerprint identification is fraught with difficulties.
"As for fingerprints, put them aside for now."
In his mind, Shen Ting summarized the series of investigation results provided by Qian Duoduo.
Just like what the group members discussed before, this case is indeed a mess—
Not only is the case confusing, but the direction and results of the investigation are also very confusing...
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