Miyun District Public Security Bureau!
Many police officers involved in the case investigation were gathered outside the appraisal room at this moment, staring closely at Shen Ting who was conducting an appraisal of carbonized leather in the appraisal room.
Everyone had different expressions, some were expectant, some were nervous.
Especially after hearing Director Su's detailed explanation of the difficulty of extracting fingerprints from carbonized leather, many police officers showed obvious worry on their faces.
Director Su looked at Shen Ting's operation and nodded slightly:
“Using cobalt thiocyanate developer and spraying the sample should be an improvement on the traditional sweat latent development method.
Shen Ting's basic skills are quite solid."
However, he soon frowned again.
Because he found that he seemed to be unable to understand Shen Ting's subsequent actions.
“Multispectral dynamic scanner?
What does Shen Ting use this instrument for?
By the way, isn’t multispectral dynamic scanning a fingerprint extraction technology that is still in the experimental stage?
Shen Ting can actually be used for actual identification?"
“Terahertz time-domain spectroscopy?
Isn't this also an experimental fingerprint extraction technology?"
This method requires the use of terahertz waves to scan suspicious fingerprint areas.
Imaging through differences in dielectric constants of materials is particularly suitable for fingerprint extraction on carbonized surfaces.
For example, burning paper, clothes, etc.
“If I remember correctly, the Chinese Academy of Sciences used this method in 2023 to extract fingerprints with an 8-level accuracy from carbonized sheepskin.
However, the degree of carbonization of the sheepskin used in the experiment was not as high as that of the leather jacket in this case.
Moreover, the experimental results are very unstable.
Terahertz time-domain spectrometers are expensive and difficult to use.
After the experiment in 2023, there has been no further progress..."
The Miyun District Public Security Bureau actually does not have a terahertz time-domain spectrometer.
However, in a previous special case, similar equipment was equipped due to special identification requirements.
Shen Ting connected and modified it with other equipment and was able to achieve a similar effect.
“This requires Shen Ting to be familiar with the structure of the equipment.
However, this terahertz time-domain spectrometer is difficult to access even for senior trace inspectors.
How come Shen Ting is so familiar? "
What is even more incredible to Director Su is that both the multi-spectral dynamic scanner and the terahertz time-domain spectrometer are only understandable to him.
He actually couldn't understand Shen Ting's more operations.
The key is!
Seeing Shen Ting so serious and the appraisal progressing step by step, Director Su also felt a little hesitant.
Could Shen Ting really complete the fingerprint extraction on carbonized leather?
The surrounding police officers looked at Director Su's increasingly surprised expression and couldn't help but hesitate, having similar thoughts:
“Looking at Director Su’s attitude, does Shen Ting really have a chance to complete the appraisal?”
Everyone stared intently, watching Shen Ting's operation more seriously.
suddenly--
“Snap!”
Everyone was suddenly shocked.
Then the carbonized leather in Shen Ting's hand suddenly shattered.
Um?
Broken...broken?
"The evidence is broken?!"
"This... can fingerprint extraction still be completed?!"
While the police officers hesitated, Shen Ting's expression did not change much.
He quickly used cyanoacrylate to secure the edges of the broken leather to prevent the carbonized layer from peeling further.
At the same time, a 3D microscope scanner was used to perform layered modeling of the salt deposits within the cracks.
After a simple operation, Shen Ting continued with the appraisal.
After a while, he walked out of the appraisal room with the freshly printed appraisal results.
The police officers' curiosity had already reached its peak, and they quickly surrounded him and asked:
"Advisor Shen, what are the appraisal results?"
"Successful? Or was there an accident?"
“It must have been successful!”
"Will the fragmentation of physical evidence affect the identification results?"
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