In fact, the approximate location of this person is already determined when the mobile phone connects to the signal base station.
However, the coverage range of a communication base station is about 800 meters.
Within this radius, it’s really hard to say where the other party is.
Lu Chuan just had dinner with the CEO of the mobile company last week.
So, Lu Chuan made a phone call on the road. By the time he arrived at the mobile company, the base station connection record about the phone used by the robbers had been printed out.
Of course, if just being the captain of the High-tech Zone Criminal Police Brigade is not enough for the boss of the mobile company to receive him personally.
But if you add the direct grandson of Qiangsheng Group, it will be different.
"Liu Lu, how can such a trivial matter be worth a trip in person?"
The person who received Lu Chuan at the mobile company was the boss he had just called.
Actually, when Lu Chuan called just now, the other party was holding an important internal meeting.
But knowing that Lu Chuan was coming, he suspended the meeting to receive Lu Chuan without saying a word.
"Mr. Chen is too polite. You can just arrange for a staff member to help. Why did you come down in person?"
The two shook hands. It cannot be said that they were hypocritical, but it was also true. It's all about human nature.
“Haha, Captain Lu is here in person, of course I have to come down.”
“Everything is done, by the way, I will set up a game tonight, will Captain Lu give me a favor? ”
This time, Lu Chuan really didn’t have a question of whether to reward him or not: "Mr. Chen, there is a serious case these days, and I really can’t get away from it."
Lu Chuan pointed to the base station connection of the phone number he just checked. Report: "When this case is finished, I will be the host, and Mr. Chen will definitely reward me."
"Okay, okay, handling the case is important, okay, I'll wait for your call."
>"This is the director of our technical center. If you need anything, just ask him directly. I have a meeting with you, so I won't accompany you for now."
"Mr. Chen, you are busy, please wait. I’ll call you in a few days.”
"Okay!"
After Mr. Chen left, the director of the technology center was left behind to be responsible for connecting with Lu Chuan.
"Hello, Lu Li, I am Chang Miao, director of the technical center of China Mobile."
"Hello, Director Chang."
"Lu Li, this phone number is Liang Miao. It was activated around New Year’s Day a few months ago, and a total of 35 calls were made.”
Chang Miao handed over a piece of paper, which contained the base station information connected to the robber's phone number
"There are 6 places in total."
"The addresses of these base stations, as well as the connecting phone numbers I marked the time.”
“Okay, thank you.”
Taking this report, Lu Chuan rushed back to the criminal police brigade.
Although Tang Guojin did not call the police through 110 in this case, he actually sought help from the police through Lu Chuan.
So the first thing on Lu Chuan's side is to go back and file a case, and the second thing is to report to his superiors.
In fact, regarding tracking the location of mobile phones, the municipal bureau branch has corresponding technical capabilities.
Lu Chuan needs to report to his superiors before he can make the call.
Office of Chen Weiguo, Director of the Branch.
"What did you say? Tang Guojin's son was kidnapped!"
Chen Weiguo was shocked by this incident.
The probability of kidnapping and extortion cases is not high. Chen Weiguo has never encountered a similar case in all his years as a policeman.
The other thing is Tang Guojin’s status.
Tang Guojin’s Tang Group headquarters is within the jurisdiction of the High-tech Zone.
It is a star enterprise in Haizhou City and a large taxpayer.
It can be said that he is a relatively important figure to a certain extent. Lu Chuan continued to report: "It's not just his son who was kidnapped."
"When we were investigating a theft case some time ago, we found a habitual criminal who suddenly had a lot of money in his hands. Cash.”
“After investigation, it was found that the other party found 3 million in a house on the old street.”
"Picked up three million?"
Chen Weiguo wanted to ask if there is such a good thing, and I also want to pick it up.
“We conducted technical appraisal analysis on the cash and travel bags found. The fingerprints extracted from them showed that Tang Guojin and his wife had access to the money.”
“Later , I contacted his son Tang Hao through some connections and confirmed that Tang Guojin’s daughter was kidnapped two months ago, on New Year’s Day.”
“But Tang Guojin did not call the police at that time. , he prepared 30 million according to the robber's request, divided the cash into 10 batches, and placed it in the location designated by the robber."
"I thought I would spend money to eliminate the disaster, but I didn't expect that the other party was greedy. Just two months later, he kidnapped his son again. This time the other party wanted 100 million."
100 million?
Chen Weiguo took a breath of cold air.
"He called the police this time?"
Probably not. If the other party called 110 to call the police, it is impossible for him, the branch director, not to know.
"Tang Guojin did not call 110 to call the police. He knew that I had contacted Tang Hao, so he contacted me directly through my home."
"I have just returned to the Criminal Police Brigade to file a case on this matter."
"In addition, in order to prevent the kidnappers from monitoring the situation at his home, I did not go to Tang Guojin's home, but asked him to meet at a coffee shop outside."
"I roughly understand. "Just before I came to you, I went to the mobile company and checked some of the call status of the phone number the kidnapper called Tang Guojin and the connection to the base station. Address.”
"At present, we have been able to roughly locate the kidnapper."
"But the specific location is locked, I would like to ask the technical department for support."
"This is no problem, I will arrange it now."
An hour later, a technical support team returned to the criminal police brigade with Lu Chuan.
The technical support team needs to make some preparations.
The first is to take over all the communication equipment in Tang Guojin's home.
For this point, it is actually not troublesome.
And the technical support team does not need to go to Tang Guojin's home at all.
Special equipment can monitor and intercept the signals of all mobile phones and landlines in Tang Guojin's home.
While Lu Chuan was busy making technical preparations, he was not idle either.
After Tang Hao disappeared, his friend who was riding a bicycle with him brought his bicycle back from Beishan.
When Lu Chuan went to the branch to report for instructions, he had already arranged for Wang Zhaokai to transport the bicycle back to the Criminal Police Brigade.
Lu Chuan is currently collecting fingerprints on the bicycle. .
This is relatively simple for Lu Chuan, there are not many fingerprints on the bicycle.
In less than an hour, the fingerprint extraction work was over.
Taking fingerprints from a bicycle is easy compared to taking fingerprints from travel bags and cash.
It’s just that the components on the bicycle are all cylindrical.
So most of the fingerprints extracted by Lu Chuan were distorted.
In this case, identification and analysis will be slightly more difficult.
After all thirty-two fingerprints were identified, it was already night.
The results of the appraisal were very gratifying. (End of this chapter)