As soon as Zhang Chuanyi finished asking the question, many police officers in the conference room reacted.
Two words appeared in their minds:
Dance?
Leatherworkers might be dancing in a cabin?
The police officers who had previously participated in the investigation of Su Kexin's disappearance immediately thought of the scene of the murderer dancing around the accident car.
The leather maker task force is not familiar with Su Kexin's case.
They were all very surprised to see the surprised expressions on the other police officers' faces.
Yang Changlong immediately introduced the case to them.
"Dancing? The murderer is so brave!"
"How dare you dance in front of the dashcam at the crime scene?"
"Why do I feel like the murderer is...provoking us?"
"It's bad enough that he was just jumping around the wrecked car, but he was actually jumping around a body in a pool of blood?"
"This criminal is a little... weird!"
The police officers felt a little scared when they imagined the scene of dancing around the headless corpse and stepping on the blood.
The young inspector in charge of the report said, "Dancing is very likely.
Because we found that the distribution of blood spots on the wall was not uniform.
There are more or less blood points in different locations.
The overall height has ups and downs.
This shows that the murderer's trampling was not random and irregular, but probably had a certain rhythm.
Considering the circumstances surrounding Su Kexin's car accident, dancing is a very reasonable speculation."
"In addition to these, we have traces checked and found that they are still one kilometer away from the cabin.
Wheel marks were found on a muddy slope without dead branches or leaves.
The suitcase that Su Kexin got into had the same wheel pattern.
These are basically the clues we found through our trace inspection.”
The DNA lab technician then stood up:
“No biological evidence of the criminal was found around the cabin, so DNA testing was naturally impossible.
We can only confirm that the headless body hanging upside down is indeed Su Kexin."
The forensic examiner continued:
“The findings of our forensic laboratory were not too many.
The paper barrels for fireworks outside the wooden house are very common items.
It is difficult to trace the source and find the buyer.”
"We focused on identifying the pool of blood on the floor of the cabin and the blood splatter on the wall.
If the murderer danced in a pool of blood, the soles of his shoes would definitely come into contact with the blood.
As we all know, fingerprint and DNA identification are no longer secret technologies.
Many criminals wear a set of gloves, masks and hats when committing crimes in order to avoid leaving any evidence.
But the soles of the feet are often not taken seriously.
The soles of shoes are actually very easy to leave clues.
When criminals walk around their homes and workplaces, hair, fibers, etc. are likely to stick to the soles of their shoes.
Larger particles of evidence may also get squeezed into the gaps between the tread patterns on the soles of shoes.
When entering the crime scene, which is the wooden house in this case, these physical evidences on the soles of the shoes may have been left at the scene.
These physical evidences may reveal clues such as the criminal’s occupation, residence, and places he frequents.”
The forensic examiner said directly:
"We took samples of the blood in the pool and the blood spots on the wall and conducted identification.
It was finally discovered that the spectrum and energy spectrum of the sample were indeed different from those of the common blood in the control group.
However, the difference is very subtle.
We try to separate special substances that may be present in blood samples.
However, it has not been successful yet.”
The appraiser's voice couldn't help but become a little low at the end.
after all!
Identification of physical evidence is their job.
It is not a glorious thing that we have not reached a definite conclusion now.
The police officers in the conference room immediately found the physical evidence identification report.
It contains identification charts of the pool of blood in the wooden house and ordinary blood.
After seeing this, the ordinary police officers all stared in amazement.
After all, they are not professional appraisers and cannot see the difference in the waveforms on the appraisal chart.
Because the blood spectra and energy spectra of different people are different.
Even two blood samples taken from the same person can produce slightly different results.
not to mention!
The floor of the wooden house is ordinary soil.
Although it was frozen very hard, the original substance of the ground would definitely be absorbed into the blood.
This will naturally cause changes in the blood, spectrum and energy spectrum in the cabin.
To find special changes from the existing changes naturally requires extremely high experience and vision from the appraiser.
It is normal that ordinary police officers cannot see the difference.
However, others could not see the trick of the comparison picture, but Chen Ting could.
The palynology and forensic geology he had previously mastered included the use of advanced equipment such as infrared spectrometers and scanning electron microscope energy spectrometers.
Naturally, there are different ways to view spectra and energy spectra in different situations.
therefore!
Shen Ting only took a quick look at the comparison chart of the cabin blood and ordinary blood and discovered the difference.
"There are a total of twenty samples in the laboratory, and the spectra and energy spectra of eight of them do show slight differences from those of ordinary blood.
It must have been mixed with some special substances."
As Shen Ting thought about it, the physical evidence examiner continued:
“We suspect that the special substance in the blood sample may have come from the soles of the leatherworkers’ shoes.
My master and his colleagues are speeding up the identification process.
If everything goes well, the results will be out in no time.”
After saying that, the evidence examiner sat down.
Shen Ting read the physical evidence identification report while looking at the identification techniques on his mobile phone.
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