Chapter 902 The direction of clues
All four bodies were exposed outdoors, so there were footprints and traces of varying depths around the crime scene. There are suspects and murderers, and theoretically, there are also traces of rape and even corpse rape.
However, due to the decomposition of the corpses, the extremely rapid growth of local vegetation, and the frequent heavy rains and exposure to the sun, these traces have been greatly disturbed.
Just looking at the footprints collected in the four cases, we can roughly judge that only the murderer and the victim were present at the crime scene. However, it is extremely difficult to obtain more clues to the case through positive analysis.
However, conversely, with certain analytical conclusions, it is enough to use these traces to make arguments.
Jiang Yuan watched the previous autopsy videos of the three corpses and gave a positive answer to the second and third corpses: "These two corpses also have traces of being raped."
"Is it only the first corpse that was not raped?" Nicha pondered for a moment and said, "Is it the first time when there was no such strong need? Or is it that he didn't know that he had such a need? Or? Is it a gradual psychological abnormality?"
Malaysia was a former British colony, and the police's deployment, training, and crime-solving models were all copied from the British and re-localized. Therefore, when faced with a serial killer, Nicha's first step was to conduct criminal psychological analysis.
Jiang Yuan did not put himself in the murderer's shoes. He just raised his head and said: "The first corpse was more rotten. It is not sure whether it was raped. In addition, it is also possible that the rape was unsuccessful. . In this case, it will not be reflected on the corpse."
Nicha suddenly realized: "Yes, it may be the first time to rape a corpse. I am not very skilled yet, so I may not be able to get in."
"It's also possible that you were too excited and shot it early outside. If you wipe it afterward and leave it outside for another two days, the tissue outside won't be visible anymore." Jacob put forward another point of view.
Nicha, Jiang Yuan and others all looked at Jacob with suspicious expressions, and Zhong Renlong's translator paused twice before continuing. Immediately afterwards, the comrades from Ningtai also looked at Jacob "with suspicious eyes".
Jacob hurriedly said: "Rapists often have problems with premature ejaculation and inability to cum. It is not strange to be too excited and ejaculate early."
"It's very strange that I felt too excited when I raped a corpse for the first time." Nicha half-joked, then nodded and said: "But there is indeed such a possibility. Well...if we count it this way, the murderer His place of residence or work should be at the intersection of the four places where the crime was committed?”
Zhong Renlong added: "We have already investigated this direction."
The two men were talking about the standard police investigation model. Draw a circle with the crime scene as the center. The intersection of four large circles in four cases has a high probability of being the suspect's place of residence or work.
This model sounds crude, but it has been proven many times. Because most of the time, humans are just such simple animals, especially serial killers who follow their instincts. This is even more true.
Nicha thought for a moment, then looked at Jiang Yuan, and then asked Zhong Renlong: "Who was sent to investigate at that time?"
In the case of serial rape and murder, the Malaysian police also invested a lot of police force and investigated in many directions.
Zhong Renlong checked his mobile phone and said: "The third group conducted an investigation. They investigated companies within the scope, retrieved information on owners and tenants of local apartment buildings, and also investigated accommodation in local hotels, etc."
"If it's just like this, it's not enough. At least you have to go door to door and ask and investigate." Jiang Yuancai crawled out of the mud pit in Meiyang City. When he heard it, he knew that they could not meet the inspection standards. At most It can only be regarded as visiting level.
But in this kind of case, if you send a dozen or twenty people to visit, hoping to find out through the people, from the people, the person who is not the people, the difficulty is too high, and it is a bit of a matter of luck.
Zhong Renlong smiled bitterly: "Without a search warrant, many people are unwilling to cooperate."
Jiang Yuan had experienced a similar situation in Malaysia before, and he nodded without surprise, pondered for a moment, and said: "Judging from the current situation, the intensity of the search is definitely not enough. However, we can look at other things first." evidence of…"
Several people then finished the autopsy, went to the bathroom to wash themselves, then changed their clothes, and went to the office upstairs together to read other information.
The police had already sorted out the footprints, fingerprints, preliminary investigation reports, etc. Jiang Yuan looked through them one by one and identified some of the main fingerprints.
Not much gained.
Although Jiang Yuan only spent a few hours on the investigation, the investigation was almost over at this point.
After marking a few scattered fingerprints and comparing them to no avail, Jiang Yuan said decisively: "Next, I suggest that the intersection points around the crime scene be the focus of the investigation."
"Is it the area around the hidden area? Although the delineated range is not large, but...should it be strictly implemented according to the delineated range? If it exceeds the range of a few hundred meters, the scope of the investigation will increase a lot." Zhong Renlong put forward a realistic question question.
For a relatively prosperous neighborhood, if the investigation radius increases by 100 meters, the list of investigators may increase by tens of thousands, which is a big challenge for the police force of any city.
So, what if the radius does not increase? Should we strictly delineate the scope based on the results of the paper drawing?
From a normal perspective, everyone is always a bit fluctuating in what they do. Serial killers may not be so accurate and uniform in what they do. So how much should the radius be increased?
Jiang Yuan had done many scenes with Xu Taining, and he didn't verbose so much at this time. He simply followed the method he learned from Xu Taining and said: "Just follow the designated range strictly, and don't go beyond it. If you can't find it, Let’s expand further. But within the defined range, we must carefully investigate. Can this be done?”
This is Xu Taining's idea. If you want to investigate, you must investigate thoroughly. For example, the investigation done by Nicha and others before was not thorough enough, so now we have to consider the issue of secondary investigation.
Nicha and others looked at each other, hesitating, and discussed in a low voice, "Jiang Shen, although we also want to conduct door-to-door inspections, it is really difficult to do it. Moreover, the goal of our inspection is to extract fingerprints With DNA, I’m afraid it’s even more difficult.”
Jiang Yuan was stunned when he heard this. This was Xu Taining, and he could only buy a return ticket.
Zhong Renlong also whispered: "God, our previous investigation intensity has reached its limit. If we want to increase the scope and depth of the investigation, I am afraid we will need some evidence support, and perhaps a court summons and the help of a lawyer."
Zhong Renlong said this first in Chinese and then in Malay.
Miao Ruixiang clicked his tongue when he heard this: "Malaysia has made it more difficult. Rapists have to be beaten more often."
Zhong Renlong continued to translate, and Miao Ruixiang hurriedly said: "I made a complaint, no need to translate."
Jiang Yuan waved his hands when he heard this and said: "If the intensity of the normal investigation has reached its limit, then let's do this for now and let's think of other ways."
This is actually part of Xu Taining's troubleshooting method. To thoroughly investigate this matter is essentially a comparative level. If it is more thorough, it is still unclear.
Therefore, since Nicha and Zhong Renlong both think that the local investigation is over, then simply investigating this clue can be considered exhausted. For the police, there is nothing incomprehensible about this. There are many places in the country where it is impossible for you to investigate to your heart's content. In other words, before the popularization of DNA technology, no matter how thorough your investigation is, it may not be thorough enough. Coordinate silver case.
"Actually, the scope that needs to be investigated is not particularly large. Let me provide you with an idea. The footprints left by the suspect are very complete. You can judge the gait through the footprints. If you can collect the gait information of these people within the investigation scope, , such as videos of incoming and outgoing transactions, I can also directly make judgments.”
The plan given by Jiang Yuan is equivalent to making a humanoid gait analyzer - cameras at domestic airports and high-speed rail stations can already be independently analyzed and matched. Malaysia does not have such a system or corresponding database. Jiang Yuan directly appeared in person.
What Nicha and Zhong Renlong heard were very different. This was different from Jiang Yuan's previous performance on the TV station. This was a matter of two orders of magnitude.
At the TV station, Jiang Yuan might only need to see two-digit footprints and footprints, but if he were to watch a video to analyze the footprints and gaits in an area, there would be more than ten thousand people.
"Is it really possible? Is it too hard?" Nicha put away his shock and turned into admiration and a little bit of embarrassment.
"The clues are stuck here. It's not hard work. I can see three to five hundred groups of gaits in an hour, but I can only see one or two hundred tracks. You should try to collect as many videos as possible." Jiang Yuan This is not just a casual comment. It has long been known in China that crimes are solved by watching videos. At most, thousands of police officers have been organized to watch videos.
However, watching gait is much easier than other methods, but the technical requirements are high.
Jiang Yuan said this, looked at the time, and said: "That's it for today. I'm going to bed early. Thank you for your hard work. I will officially start watching videos tomorrow afternoon."
This period of time is used by Nicha and others to collect videos, analyze videos, and even edit videos.
Nicha and others fully understood, quickly thanked them, and respectfully sent Jiang Yuan and others to the car.
According to Huang Qiangmin's request, the hotel booked by the Malaysian police was quite good. Jiang Yuan stayed in a suite, took a shower again and went to bed.
Because Miao Ruixiang was Jiang Yuan's junior brother, he got a separate big bed room not far away. Miao Ruixiang also took a shower first, then changed his clothes, and then took out a statue wrapped in red cloth from the suitcase.
Miao Ruixiang respectfully placed the red cloth statue on the table, lit three incense sticks, and then uncovered the red cloth. A wooden statue of Jigong Bodhisattva was revealed amid the green smoke.
Miao Ruixiang bowed, then took out his mobile phone in person and made a video call to his master Wu Jun.