"It's not uncommon for a person to have two, or more, IDs. For example, in the 2013 Shaanxi "Sister Fang" incident, the criminal had 4 hukou and corresponding identity information. Wang's mother and son were 'professional counterfeiters', and before computers were widely used on a large scale, it was indeed possible to make all kinds of fake birth certificates, birth permits, and other forms of identity information to apply for multiple pieces of identity information. Ma Hongwen retracted his gaze from the projection screen and said: "We have handled a case before, and the criminal also has two ID cards, but his two ID cards are not maliciously applied, but his parents divorced in the early years, and his biological mother took him to remarry across provinces, and his biological father and stepfather each have an ID card under the household registration book, and the surname is different." In addition, due to historical policy reasons, some pregnant women have returned to their mother's home in other places to avoid family planning, and after the birth of the child, the parents have handled the household registration information for the infant in different places in the absence of communication, and there will be two different ID cards for the same person in the future. ”

Ma Hongwen thought for a while, and added: "Whether the Wang brothers, or Li Haidong, handled multiple identity documents intentionally or unintentionally, we can't be sure for the time being. Of course, we also suspect that Li Haidong and the Wang brothers are not at all what we speculate and analyze, that is, they are unrelated and different people. But the people in the photo on the ID card look exactly the same, how to explain these? There are only 7 days before and after the validity period, in the era when computers are not yet popular, Wang Fang took the left foot of the Wang brothers to apply for an ID card in the Yanshan Branch, and then ran to the Sanqing Branch to apply for it with the right foot, and then a number of ID cards were replaced on schedule, this possibility completely exists. ”

"In other words, through the comparison of ID numbers, the method of confirming that Li Haidong is one of the Wang brothers will not work." Director Liu thought for a while, and then asked: "Building 17 of Harmony Community, if it is Wang Fang's counterfeiting den, and then it will be inherited by Li Haidong, then why is there no Wang Fang's fingerprints in the den?" Or is Li Haidong's 'dermatosis' inherited from Wang Fang, or that Wang Fang's ID card was also applied for before 2012 and is still valid, so Wang Fang's identity information is not fingerprinted? ”

Ma Hongwen gestured to Juan to continue.

"As Liu Ju said, Wang Fang's ID card is still valid, and his identity information is indeed not entered with fingerprints." Xiang Juan pointed to the screenshot of Wang Fang's identity information on the projection screen and said.

Everyone's eyes were focused on the projection screen again, and they saw that the validity period on the screenshot was "2011.4.15 to 2021.4.15", which was exactly the same as the validity period of the Wang brothers' ID card.

"In addition, the finger prints we extracted in Building 17, through comparative analysis, should belong to two people, and from the perspective of thickness, they should also belong to a man and a woman, which means that it is more likely that these finger prints belong to Li Haidong and Wang Fang. However, there are no fingerprints on the fingerprints of the two people, and the possibility that Wang Fang also has 'skin striation' as mentioned by Liu Ju does exist. But Li Haidong's 'skin striatism' may also be inherited from the paternal line, which means that Wang Fang may also have fingerprints. ”

"According to the latest autopsy, nitrocellulose was found in the 'soup' that had boiled the deceased's head and hands. In addition to being used in the production of celluloids, motion picture films, nitro paints and explosives, this chemical is an indispensable ingredient in nail polish. In other words, Wang Fang should have the habit of wearing nail polish, but it is uncertain whether her nail polish is applied to her nails or the inside of her fingers to cover her fingers. If she had fingerprints and had applied nail polish to the inside of her fingers, it would have made perfect sense that she had only fingerprints and no fingerprints left in Building 17. Xiang Juan said.

There was a brief silence in the room.

Li Zhudao's assumptions make it seem that the investigation of the case has made very important progress, but the difficulties and suspicions encountered are also increasing.

Director Liu said unhurriedly: "In other words, since the deceased did not leave fingerprint traces in room 1304, and Wang Fang also lacked fingerprint samples, it is impossible to confirm that the deceased is Wang Fang through fingerprint comparison." ”

Director Liu thought about it carefully and said, "I have a few questions. According to the clues, since Li Haidong has 'skin striae', he does not have fingerprints, and it is assumed that Wang Fang also has 'skin striae', or she has the habit of applying nail polish on the inside of her fingers. After all, judging from the previous clues, it is very likely that the mother and son will develop this habit of covering up fingerprints out of illegal behavior, that is, the need to make and sell fake certificates. The question is, since Li Haidong and Wang Fang already have the conditions to leave no fingerprint traces, why did Li Haidong clean his fingerprints in room 1304? ”

"Li Zhudao, you come." The analysis of the case is not Xiang Juan's business scope, nor is it her strength, Ma Hongwen immediately ordered someone who is good at this to answer. Liu Jinsong did not have many opportunities to go to the front line to listen to the report of the case, and Ma Hongwen intended to let the young people of the detachment seize the opportunity to perform.

"There are two possibilities for this to happen. One is that Li Haidong did not know that he or the deceased had 'dermatosis'. According to the doctor, the symptoms of 'skin striatosis' are not obvious. In other words, due to the need to set up a fingerprint lock screen with a smartphone, you may find yourself without a fingerprint. But Li Haidong is not an ordinary person, the technical team tested his mobile phone and found that it was not a smartphone at all, but an 'elderly machine' that needed to be entered by pressing a button. In other words, while the symptoms of 'dermatosis' are not obvious, and Li Haidong does not need to use fingerprints in his daily life, it is very likely that he does not know that he has 'dermatosis'. In this case, it is highly likely that he did not know whether the deceased was suffering from 'dermatosis'. It is also based on this that while not sure whether the deceased's fingerprints were entered into the identity information, the palms of the deceased were simply boiled and the fingerprints of the deceased were completely eliminated, so as to cut off the way for us to screen out the identity of the deceased from the household registration system through fingerprint comparison. ”

"As for the deceased applying nail polish to the inside of his fingers, let's assume that this is the case. Judging from Li Haidong's travel patterns, he always left early and returned late, and the relationship with the deceased was that of mother and son, and did not live in the same room. Therefore, in this case, Li Haidong would have thought that it was necessary to remove the fingerprints in room 1304, of course, he himself did not realize that this move was completely redundant. ”

"Another possibility is that in addition to Li Haidong and the deceased, room 1304 may have left fingerprint traces of other people, who may be one or more. And Li Haidong's move to clear his fingerprints is most likely because he doesn't want us to know who and who this 'other person' is. As for the specific reason, we don't know for the time being, and we don't know if this 'other person' is related to the murder. According to the feedback of the comrades of the information group, the monitoring equipment of the community was repaired once in the month that Li Haidong lived in room 1304, that is, on October 2, and the monitoring of this maintenance happened to be in the elevator entrance and elevator of the unit building where Li Haidong was located. Of course, whether there are 'other people' who have entered room 1304, whether the failure of the monitoring equipment this time is due to human reasons, or whether it is indeed the cause of the equipment itself, we do not know. ”

Liu was serious and noncommittal, saying: "After identification, the deceased and the suspect have a mother-son relationship, why did the suspect lie that the deceased was his girlfriend in the WeChat group?" ”

"There are three possibilities. First, Li Haidong wants to alleviate his guilt by deceiving himself and others. The killing of his own mother may have made Li Haidong more psychologically and ethically acceptable than the killing of his 'girlfriend'. Second, Li Haidong destroyed the face and fingerprints of the deceased in order to cover up the identity of the deceased, and his statement in the WeChat group was to create a false impression for us and mislead us in the investigation or closing statement, so as to further achieve his goal of covering up the identity of the deceased. As long as Li Haidong achieves one goal, then the first possibility is in turn. Third...... Li Haidong said...... Probably true...... In other words, the deceased is both his and his ...... What the hell. After all, Li Haidong's various behaviors have broken through the bottom line of social morality and ethics. Of course, this is only a possibility, not necessarily a fact. Li Zhudao stumbled in the end, just because even he felt that this assumption was ...... Have a bone in one's throat.

Sure enough, the conference room was immediately filled with brief head-to-head exchanges, and all kinds of incredible boos and exclamations.

Xiao Wu covered his mouth and nose with his hands. It can be seen that she is very nauseous at this moment and wants to vomit.

Lao Liu's face was gloomy and he shook his head, and he didn't know if he thought it was unlikely, or if he felt unacceptable in his heart.

"Evil...... Ouyang frowned and muttered to himself.

Xiao Wang chewed gum and scolded an easy-to-understand quintessence. Peng Jie was much more gentle, and said lightly: "He is his mother." ”

The captain of the horse detachment deliberately coughed heavily, and after everyone quieted down, he said, "This kind of case is not uncommon. For example, a family case of 38 people occurred in Australia a few years ago. As criminal investigators, we must abandon our personal emotions in the face of all cases, and only explore the facts and seek the truth. ”