"It only takes one hour to check all the surveillance cameras?" Director Tian's voice rose two octaves.
His heart suddenly moved, and he locked the approximate location in an hour. If the prisoner did not flee directly to other provinces immediately, but hid near Changping, he would be able to directly arrest him in another hour.
His original best plan was to capture the prisoner within 48 hours. If it could be shortened to a few hours, this would be a criminal initiative like a god coming down to earth.
We received a report early that morning, collected witnesses and evidence in the morning to identify the number one suspect, arrested him directly at noon, and had a hot lunch when we returned to the station.
In ancient times, one could warm wine and kill Hua Xiong, but now I, Tian Yunsheng, warm rice and catch the criminal.
In this case, generally speaking, it is not appropriate to directly provide such surveillance evidence to a third party.
But as the matter was urgent, Tian Yunsheng did not bother to cross-examine, and directly asked Wang Kai to copy a copy of the video file.
Although he agreed to provide assistance to Baidu, Director Tian will not stop any work at hand until there is any result. The police are still doing their own thing.
Wang Kai quickly rushed back to Baidu Deep Learning Research Institute and linked the large hard drive to Baidu's server.
When Li Yanhong heard about this, he was overjoyed and praised Wang Kai's on-the-spot reaction.
Immediately pull out a group of developers and let them be responsible for segmenting and storing these videos.
Wang Kai focuses on the modification and testing of algorithm functions.
In order to get the results as quickly as possible, Wang Kai adopted the stupidest method, which is to record the video file name and video playback description at that time into a txt text document every time the algorithm detects a human target in the video. in.
This is the method that requires the least modification. At that time, the public security police only need to check the video according to the time points described in the txt file.
Wang Kai probably tested a video clip at different time points and made some comparisons. He found that during the twelve hours from the incident to 8 or 9 in the morning, there was basically no one around.
For ten hours of surveillance, it would be good if someone showed up for five or six minutes. This part can save the police a hundred times of time.
After eight or nine o'clock, the number of people began to increase. However, it was already 12 hours before the crime occurred, and it was no longer a time period that required focus on observation.
There is a high probability that traces of the suspect will be found from the surveillance video in the early morning hours, and then targeted investigations will be carried out.
Including the round-trip drive, it took Wang Kai about more than two hours. Before he returned to Yanjing Changping Public Security Bureau, he had already sent the important time points he recorded via email.
"Okay! Okay! Okay!" Director Tian was overjoyed and said "good" three times in a row, and then quickly conveyed these key points of information to everyone.
The police officers who obtained the clear time point information improved the screening efficiency dozens of times. Less than thirty minutes after Wang Kai came back, someone discovered the suspect's traces.
And without the help of this part of the information, everyone estimated that it would take at least six or seven hours to investigate this point at the previous speed.
"Did you see that here, he is consciously avoiding the surveillance cameras, so we have never found him in the surveillance on campus." A policeman pointed to the corner of the screen and said, "Although the murderer is an underage student, he has the ability to A certain sense of counter-reconnaissance.”
"But it's pitch dark at night, how is it possible to completely avoid the numerous cameras?" An experienced police officer sneered, "In order to avoid the school's cameras, he probably climbed over the wall like this more than once or twice. But it was still captured by cameras on surrounding streets.”
"Everyone can stop the investigation at hand and start the second round of investigation based on the starting time point of 22:02 and the location where Wang was filmed climbing the wall!"
In this kind of large-scale investigation, after the first clues are obtained, the subsequent work will be much easier and faster.
Not to mention, Wang Kai also provided the locations where people appeared in each video.
The police can easily select the points that should be prioritized based on time and relative distance.
"After he dug out, he did not escape overnight, but found an irregular hotel to stay first." After tracing Wang's traces all the way, the police quickly located Wang's first foothold.
This kind of small hotel allows you to stay in a hotel without an ID card, which is a way to avoid screening.
"He couldn't run away even if he wanted to. He is under 18 and cannot obtain a driver's license. If he relies on public transportation, he will definitely be exposed to our surveillance."
Without your own vehicle, it is easy to be found whether it is an airport, high-speed rail, train station or long-distance station.
From the moment he committed a murder on campus, he was destined to be unable to escape justice.
It just happened that Wang Kai came to promote Meng Fanqi's new technology, so he was arrested faster.
If Meng Fanqi were here, he should have some vague impression of this case.
Because these universities in Yanjing and Changping are not far from each other, such a vicious incident will be widely spread among the circles of nearby college students.
In the original timeline, the murderer Wang finally surrendered the next day. After a lot of ideological struggle, Wang finally confessed the truth to his parents.
Under the persuasion and guidance of his parents, he turned himself in the next evening, less than 24 hours before the incident.
It's a pity that that was the original timeline. The Changping police, who had stepped up their investigation speed, arrested him at two or three o'clock in the afternoon.
At this time, Wang was not mentally prepared and did not even have time to speak to his parents. The original timeline of surrender has now naturally become arrest at the speed of light, and there is no longer a surrender plot.
When several police officers handcuffed Wang and took him to the police car, it was not yet 3:30 in the afternoon, and it was less than 6 hours before the official report was made.
It was only about 18 hours before the incident occurred.
Among the records of cracking time for various cases, 6 hours is already very fast, let alone a murder case.
Generally speaking, most of these cases that are solved in a very short time are petty thefts. Many suspects may not pay attention to the cameras and go home after stealing, so they are quickly followed.
In the case of solving murder cases, those who can basically be arrested and brought to justice within 24 hours are worthy of being regarded as positive models and deserved to be written down.
On the eve of the Baidu press conference on Friday, a sudden accident and a light-speed murder case were solved, which gave the technology proposed by Meng Fanqi a practical application case.
And he won the favor and support of Yanjing Changping District.
In Australia, Meng Fanqi, who had just had dinner with the Google quartet, received a WeChat message from Wang Kai when he walked out of the restaurant.
