Lao Chen immediately inquired about the IP address of the suicide girl's recent Internet access, as Xu Tian expected, the suicide girl had recently gone online in Dong'an City, and the location of the Internet was very mobile, all of which were public places.

"That person is rubbing IFF everywhere, so it's going to be difficult to investigate." Xu Tian said.

"And the model of the Internet is different every time, that person has a lot of mobile phones, and there is no SIM card installed, which makes it even more difficult to find that person!" Lao Chen said angrily.

"We met a master, that person has a lot of mobile phones in his hand, and they all go to public places to log in to the forum, so hiding himself is simply seamless."

"If you carefully investigate the surveillance and find the same people in the public places where you have posted it, you may be able to find a breakthrough."

"No, I don't think it should be found, that person must have made sufficient preparations in advance, and he knew the IFF everywhere he went, but he didn't have to go to the scene to copy the IFF password in person, and it was very simple to know the IFF password in a public place, so I don't need to list the way, right? And I also have the idea that if that person had those IFF records on their phone, it would be really seamless. ”

"I see! If that person goes around investigating what the IFF in a public place is, no matter what method he uses, it will leave a flaw, that person is very smart, and he will definitely not do such a stupid thing. ”

"That's right! The mobile phones in his hand may have been purchased by him from unknown sources, such as buying the mobile phone from a thief, if that person does this, we will not be able to investigate the source of those mobile phones at all, no thief will admit how they sold the stolen goods, even if the thief asks for clues, it is difficult for us to investigate that person. Because thieves usually sneak around the street asking people if they want to buy a mobile phone, if they buy a mobile phone from a thief in a place where there is no surveillance, the thief will not be able to remember what that person looks like. ”

"But...... Stolen mobile phones have to be disposed of, right? For example, flashing, restoring factory settings or something. ”

"It's true, but it is not excluded that some thieves do not want to do such a troublesome thing, and now this method of selling stolen goods is also very strict, and many stores do not do this kind of business to help thieves sell stolen goods, so some thieves may sell the original machine to others after they succeed, and this situation must exist. Especially some low-end machines, or mobile phones that have been used for a long time, that kind of mobile phone does not have a high-end unlock function, generally the low-end mobile phones produced before 2015 are four-digit unlock passwords, or the kind of unlock pattern, if you buy this kind of mobile phone from the hands of thieves, as long as it takes a lot of effort, you can always unlock the lock, so that you can keep the IFF record on the mobile phone. ”

"After hearing you say this, I really broke out in a cold sweat! It is true that the probability of this kind of thing happening is very high, whether it is the means of thieves to sell stolen goods, or the type of mobile phone, it can happen, then again, the mobile phone I am using now is a domestic machine in 2015, there is no high-end unlocking function, and it takes a lot of effort to unlock the lock. ”

"After getting this kind of mobile phone, that person can guess which business is from the IFF number on the mobile phone, there are many businesses use the IFF number is the Chinese pinyin of the store name, as long as you walk in front of those stores, you can successfully connect to IFF, as long as you edit the written post or want to reply to other people's content in advance, and so on the moment you connect to the IFF, click send, everything is done. That person doesn't have to stay in the store at all, and now there are so many people walking on the street and playing with their mobile phones, and not every store is monitored at the door, and it is very difficult to investigate that person is simply looking for a needle in a haystack! ”

"It seems that the innovation of science and technology is right, the kind of mobile phones that are two or three years ago should indeed be eliminated from people's hands, which is too easy to be used by criminals!"

"No way! If you want all mobile phones to have high-end unlocking functions, the day will come soon, but in the last year or two, there are many old machines that can not be completely eliminated by people, we are in this era by the cunning people to use, if this thing was done ten years ago or ten years later, he will definitely not succeed, although our era is developed in science and technology, but there are obvious technological loopholes, whether it is an old mobile phone or IFF, it is necessary to reform it, The clever criminal managed to exploit the loopholes of this era to hide his own identity. ”

"Then now there is no way to trace the person who posted with the suicide girl's ID, isn't the clue broken again?"

"No, maybe we still have a glimmer of life, the suicide girl was registered with Zhao Di's identity information, so the person who can know Zhao Di's forum ID must be someone Zhao Di knows, and furthermore, it may be Zhao Di's closest person."

"The case is complicated again, and now we have to investigate Zhao Di, who died two years ago, and what happened to Zhao Di two years ago, this road is very difficult!" Lao Chen sighed.

"I also know that this job is not easy to do, the first thing we have to do is to ask Zhao Di's relatives, this is undoubtedly revealing the scars of others, two years, I believe that Zhao Di's parents have also come out of their grief, if they don't come out, their mood will not be as bad as two years ago, but let's mention this in front of others, I always feel ashamed!" Xu Tian said.

"That's what we police do, and I'd rather go after the most vicious gangsters than face this situation. We have to investigate the heart of the Zhao family that time, it seems that after dawn, there will be a family to regain their grief! ”

Lao Chen's words touched Xu Tian a lot, if you want to find out the truth, you have to destroy the hearts of the family, is it really right to do this?

Thinking about it carefully, it is indeed like this every time, compared to the truth of the case, Xu Tian suddenly had the idea of giving up investigating the case at this moment.

Xu Tian seemed to have a voice in his heart asking himself, "Are you ready to give up?" ”

"Give up?" Xu Tian said to the voice. "If you give up, what about the innocent dead? If you can't find out the truth, you can't ask for an explanation for the dead, and the criminals will get away with it. ”

"Humph! You don't know what kind of person the criminal you are talking about, and if, as you reasoned at the beginning, the murderer kills out of hatred, then you dare to guarantee that those who died are innocent? Maybe those deceased people did something wrong in their lives and escaped the punishment of the law, so do you still want to ask for an explanation for that kind of person? ”

Xu Tian was suddenly stunned, this question once again pierced into Xu Tian's heart, yes! The murderer is not necessarily a criminal person, and the deceased is not necessarily an innocent person, so what should be done? Do you continue to ask for an explanation for the dead, or do you connive at the murderer to take revenge?