Lu Chuan was now certain that the fingerprints on the black plastic bag were of high quality, there was no doubt about it.
But with Gao Zhiyuan's income level, it is impossible for him to afford Dahongpao tea worth one or two thousand yuan.
Lu Chuan then reported his findings.
“The fingerprints were extracted from the edge of the handle of the plastic bag. The fingerprints were broken and twisted with great force. It should have been Gao Zhiyuan who carried the plastic bag.”
If Gao Zhiyuan If the plastic bag had never been mentioned, it would be impossible for his fingerprints to be so broken.
"But according to the current investigation clues, Gao Zhiyuan was not in Tongzhou City when the crime occurred. He has a sufficient alibi."
After Lu Chuan discovered this, he still couldn't figure out what happened. What's the point?
What is the point of the murderer doing this?
If the murderer just wanted to frame him, there would be no need to go to such trouble.
The murderer can relatively completely copy the fingerprints of the framed target on the black plastic bag.
In addition, if the person being framed has a weak alibi, the police will pursue it regardless of whether they believe this clue.
In this case, the probability of the real murderer being discovered will be much smaller.
But the clues left by the Red Killer in the past 15 years point to some people with sufficient alibi.
In this case, there is no way to frame these people, and there is no way to conceal the possibility of the red killer himself.
In addition, there is genetic information that can be extracted from the body fluids left by the killer in the victim's body. This genetic information has been confirmed to be incompatible with the fingerprints or DNA information of the owner of the footprints found at the scene.
So why did the murderer go to such trouble to do these things?
Li Donglin also frowned.
Lu Chuan continued.
"Gao Zhiyuan has a clear alibi, but there are tea residues worth tens of thousands of yuan in one tael inside the black plastic bag. What does this mean?"
What does it mean?
With Gao Zhiyuan's financial ability, it is naturally impossible for him to afford tea worth tens of thousands of yuan.
So whose tea leaves belong to them?
In addition, if these tea leaves do not belong to Gao Zhiyuan, then who do they belong to?
Who put these tea residues into the black plastic bag that Gao Zhiyuan once mentioned.
“One more thing is that there is a problem with Gao Zhiyuan’s place of residence.”
Lu Chuan operated the projection and a map appeared on it.
“This is the North 2nd Lane of Jianguo Road where we found the victim’s finger, but Gao Zhiyuan lives in Hongsheng Garden Community. This community is on Beisheng Road, about 5 kilometers away from the North 2nd Lane of Jianguo Road. distance.”
After Lu Chuan obtained the clues through technical investigation, he conducted some logical analysis and judgment on these clues and came to many interesting conclusions.
"The place where Gao Zhiyuan lives is 5 kilometers away from the North 2nd Lane of Jianguo Road where we found the victim's finger. Is the other party there? Maybe he traveled so far just to throw a garbage bag?"
< br>Lu Chuan then asked: "And if Gao Zhiyuan did not throw this garbage bag over, then who took this garbage bag over?" Although Lu Chuan was asking rhetorically, in fact, combined with the senior staff, he had sufficient According to the alibi, Lu Chuan believed that the garbage bag mentioned by Gao Zhiyuan was actually used.
"Lu Chuan, what is your conclusion?"
Li Donglin is also thinking about these questions raised by Lu Chuan. On the surface, these questions may not seem related, but in fact, they are all cases. important clues.
However, if we analyze it roughly now, these clues are not related to each other, and there are even logical conflicts.
But, is it because the killer in red has not been caught having sex for 15 years because of these seemingly conflicting and unrelated details?
To investigate the case of the killer in red, many experts came from the provincial departments, ministries and commissions, but most of them were in criminal investigation.
To be honest, in Li Donglin's opinion, whether it was the provincial departments, ministries or commissions, although the experts sent out in the past were very powerful, they should be said to be weaker than Lu Chuan in terms of on-site investigation.
Lu Chuan is different from ordinary technical detectives. In addition to his technical skills, he also has a strong insight into solving the case itself.
When Lu Chuan analyzes a case, he often bases it on the perspective of technical investigation, and then conducts logical analysis and judgment.
This is actually very rare, and this is also the most important reason Li Donglin thinks why Lu Chuan's crime detection rate is so high.
Generally, technical criminal police officers do the logistics work before leaving the business and take things back. Then the technical criminal police officers are responsible for analysis and judgment, and then feed back the results.
The criminal police responsible for investigation at the front end directly use the technical analysis results produced by these technical criminal police.
In fact, there is a missing process of mutual communication and questioning.
Often the technical results of on-site investigation and the criminal police’s analysis of the case are not completely consistent.
But there is no such problem with Lu Chuan. He has superb skills and strong ability to handle cases. The two are combined at all times. In him, 1+1 is greater than 2. effect.
"What I mean is to focus on Gao Zhiyuan and focus on investigating everyone who may have come into contact with his discarded garbage bags."
In Lu Chuan's view, no matter who the suspect is, the other party has obtained Gao Zhiyuan's black plastic bag, and then put the victim's severed finger inside. This was definitely not accidental, but planned.
The reason is also very simple. The criminal suspects will point some clues to some unrelated case personnel in the cases they have done in the past 15 years.
These people are not related to the case because they have complete alibi, but some clues about them were found at the crime scene.
If only one case or two cases are like this, then it may still be said to be a coincidence, but if 11 cases are like this within 15 years, then it is definitely not a coincidence. coincide.
The suspect must have some access to Gao Zhiyuan.
In addition, Gao Zhiyuan and the victim both work in Aijia Supermarket. Is this also a coincidence?
By coincidence, the suspect randomly picked up a black plastic bag from a place 5 kilometers away from Jianguo Road North Lane 2 and put the victim’s severed finger in it. It turned out that the owner of the black plastic bag was the victim’s Colleague, how is this possible?
If it is possible this time, how to explain the previous cases?
Lu Chuan carefully studied the files of the previous 10 cases.
Although the cases occurred in different time periods, and some of the specific circumstances of the victims were not particularly the same and the crime scenes were different, there were still many similarities behind them. (End of this chapter)