Tang Ren: "Damn it, why are there so many snowflakes~~
It's just like a mosaic!
This detective's eyes are dazzled. Now when I look in the mirror, I can't even see my handsome face. All I can see is a bunch of mosaics~~"
Kiko: “I can make the video clearer, but it’s limited.
Alas, this kind of job of finding people is the most troublesome.
In particular, as soon as the criminal took control of Yin Tingxue, he should have disposed of her mobile phone card.
I saw her mother called her early this morning, but she was out of service area!"
Shen Ting was stunned:
"Wait, Kiko, what you mean is that if someone called Yin Tingxue after she disappeared, there would be a way to determine her location?"
Kiko: “Of course!
The principle of mobile phone calls is that after the dialer dials the number, the mobile phone will convert the instructions into digital signals.
And send the signal to a nearby base station via radio at a specific frequency.
The base station receives the corresponding signal, processes and amplifies it, and then forwards the signal to the core network based on the called party's number.
The core network will verify the identity of the dialing party, query the location of the called party, and so on.
Then, based on the location of the called party, the call request is sent to the base station at the corresponding location.
The base station searches for the called party by broadcasting signals within its coverage area.
When the called party receives the paging signal from the base station, it will send a response signal to inform the base station of its location and status.
The base station then contacts the core network to make the call!
In short, that’s pretty much it.
The SIM card in the mobile phone is what enables the calling function.
Therefore, as long as the SIM card is not removed, even if the called party does not answer the call, as long as the phone rings, it means that the above process is completed and the SIM card has responded.
Based on the service provider’s data, not only can the location of the responding base station be found, but also the corresponding time and the approximate location of the called party.
Group leader, you must know all this, right?
?_??”
Shen Ting really didn’t know anything about this.
After all, he is an outsider and has not received any systematic criminal investigation training.
Even though I have been cramming my knowledge of criminal investigation recently, it is impossible to cover everything in such a short time.
The key is!
When Yin Tingxue's mother called her, her mobile phone SIM card did not respond.
But Gaoya responded!
At noon today, Chen Ting called Gao Ya again, and after many calls, he was told that the service area was out of range.
And the first few times, although the call was not connected, the SIM card responded.
Shen Ting immediately shared the operator's data and uploaded it to the group file.
Group owner: “@kiko, take a look at these data.
In addition to Yin Tingxue, there is actually another person missing.
The two are colleagues!
Her number is 138****7843!
Someone called her number at noon. Check her location at that time."
Kiko: "It's no big deal, just look at this hacker.
?(?'；?'；?)??*”
Shen Ting frowned and thought:
“Why is Yin Tingxue’s SIM card not responding?
And responded elegantly?"
If the two were attacked by criminals at the same time, the criminals would know to remove Yin Tingxue's SIM card.
It’s impossible not to choose elegance!
"I guessed wrong, weren't the two attacked at the same time?
Didn't Gao Ya discover Yin Tingxue when she entered the alley? "
Shen Ting shook his head.
Both of them were in this area at the time and were so close to each other.
It was late at night and it was snowing. Gao Ya originally planned to take the bus home, but she went into an alley.
He must have discovered something!
Relatively speaking, the probability of discovering Yin Tingxue and therefore entering the alley is very high.
If there were other reasons, it was possible, but Gaoya was not stupid, so it was unlikely that he would rashly enter a dark alley.
"It is very likely that the two met at that time and disappeared together afterwards.
But the elegant sim card can respond..."
Shen Ting's scalp tightened, and he thought of a terrible possibility.
Since Gao Ya was fine by noon, was it possible that she had a conflict with Yin Tingxue?
Perhaps, she advised Yin Tingxue not to get involved with the gang?
During the argument between the two, she accidentally killed Yin Tingxue?
Shen Ting felt a little blocked in his heart. He took out his phone, opened WeChat, and looked at Gao Ya's last message:
“Chen Ting, I’m sorry, I like you, but I… hehe!”
He previously thought that the discordant "Hehe" at the end might have been left by the criminal.
The criminal found out Gao Ya was sending a message, so he typed “Hehe” as a provocation!
But it doesn’t really make sense!
If it was as mentioned above, it was Gao Ya who hit her, and she was controlled by the criminal.
At such a critical moment, shouldn't she send a message for help?
Maybe, “Hehe” was typed by Gao Ya herself?
It’s not a provocation, but self-mockery, is it helplessness?
"But that's not necessarily the case!"
Gao Ya and Yin Tingxue have a good relationship and don't have any major conflicts.
In theory, even if there is a dispute or even a scuffle, it would not easily lead to death.
The human body is not that fragile!
and!
Yin Tingxue was distributing prostitution cards, not engaging in prostitution herself.
Normally, Gaoya wouldn't be so excited. Normally, he would just give some advice and not make a big deal out of it.
To put it simply!
Gao Ya not only had no motive to kill, he didn't even have a motive to argue.
"strangeness!"
The more Shen Ting thought about this case, the weirder it seemed.
However, although there were many doubts, he always felt that Gao Ya was unlikely to be the murderer. He finally relaxed and let out a long sigh.
Just at this time, the crime-solving team got the news.
Kiko: "Group leader, we found Gaoya!
ヾ(????)?~”
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