"It only takes an hour to check all the surveillance?" Director Tian's voice rose two octaves.

He was instantly moved, and locked the approximate location in an hour, if the prisoner did not go directly to the province at the first time, but hid near Changping, he would be able to be directly arrested and brought to justice in another hour.

His original best plan was to arrest the prisoner within 48 hours, and if it could be shortened to a few hours, this matter would be a criminal feat like a god.

I received a report early in the morning of the same day, obtained human and physical evidence in the morning to determine the number one suspect, and directly arrested him at noon, and returned to the bureau for hot lunch.

In ancient times, there was warm wine to kill Huaxiong, and now I Tian Yunsheng Wenfan to arrest criminals.

In such cases, it is generally not appropriate to provide such surveillance evidence directly to a third party.

But in a hurry, Tian Yunsheng didn't interrogate too much, and directly asked Wang Kai to copy a copy of the video file.

Although he agreed to Baidu's assistance, until there was any result, Director Tian would not stop any work at hand, and the police were still doing their own thing.

Wang Kai quickly rushed back to the Baidu Deep Learning Research Institute and chained the large hard disk to Baidu's server.

When Li Yanhong heard this, he was overjoyed and praised Wang Kai's on-the-spot reaction.

A group of developers was immediately selected and put in charge of the segmentation and storage of these videos.

Wang Kai focuses on the modification and testing of algorithm functions.

In order to get the fastest results, Wang Kai used the most stupid method, that is, whenever the algorithm detects a human object in the video, it records the video file name and the video playback description at that time into a txt text file.

This is the method that needs to be modified the least, and when the time comes, the public security police only need to view the video according to the time point described in the txt file.

Wang Kai probably tested the clips of a video at different points in time, and made some comparisons, and found that in the 12 hours from the incident to 8 or 9 o'clock in the morning, there was basically no one.

Ten hours of surveillance, it would be good to have someone show up for five or six minutes, which can save the police a hundred times the time.

After eight or nine o'clock, the number of people began to increase, but at this time, it was already 12 hours from the time of the crime, and it was no longer a time period that needed to be observed.

With a high probability, the traces of the suspect will be found from the surveillance video in the early morning of the previous morning, and then the suspect will be investigated at a fixed point.

Including the round-trip drive, Wang Kai spent about two hours, and before he returned to the Yanjing Changping Public Security Bureau, he had already sent his own record of important time points through his email.

"Good! Good! Good! Director Tian was overjoyed, said three good things in a row, and then quickly conveyed these key points to everyone.

The cadres and policemen who have obtained clear time point information have improved the efficiency of screening dozens of times, and within 30 minutes of Wang Kai's return, someone found the traces of the suspect.

And if you don't use this part of the information, everyone estimates at the previous speed, it will take at least six or seven hours to find out here.

"See, here, he is consciously avoiding the surveillance cameras, so we have not found him in the surveillance on campus." A police officer pointed to the corner of the screen and said, "Although the murderer is a minor student, he has a certain sense of anti-reconnaissance. ”

"But this big night, it's pitch black, how can you completely avoid the dense cameras?" The experienced policeman scoffed, "I'm afraid he climbed over the wall like this more than once or twice in order to avoid the school's cameras, but he was still caught by the cameras on the surrounding streets." ”

"Everyone can stop the investigation work at hand, and start the second round of investigation at the starting time point at 22:02, where Wang was photographed over the wall!"

This kind of large-scale investigation, after having the first clue, the subsequent work will be much easier and faster.

Not to mention, Wang Kai also provided the location where people appeared in each video.

It is easy for the police to choose which points should be prioritized based on time and relative distance.

"He didn't run away overnight after he turned out, but found an irregular hotel and stayed first." Tracing Wang's traces all the way, the police quickly located Wang's first foothold.

This kind of small hotel does not require an ID card, which is a means to avoid screening.

"He can't run if he wants to, he's under the age of 18 and can't get a driver's license. If you rely on public transportation, you will definitely be exposed to our surveillance. ”

Without your own vehicle, whether it is an airport, high-speed rail, train station or long-distance station, it is easy to find a trace.

From the moment he committed the murder on campus, he was already destined to escape justice.

It's just that he happened to meet Wang Kai to promote Meng Fanqi's new technology, and he was arrested faster.

If Meng Fanqi was here, he should have some vague impression of this case.

Because these universities in Yanjing Changping are not far from each other, such a vicious incident will be widely spread in the circle of nearby college students.

In the original timeline, the murderer Wang finally surrendered the next day, and 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 evening of the next day, less than 24 hours after the incident.

It's a pity that it was the original timeline, and the Changping police, who had escalated the speed of investigation, directly arrested him at two or three o'clock in the afternoon.

At this time, Wang was not psychologically prepared, and he didn't even have time to talk to his parents, and the original timeline of self-surrender has naturally become arrested at the speed of light, and there is no longer a plot of surrender.

When several police officers handcuffed Wang and took him to the police car, it was not yet half past three in the afternoon, less than six hours before the official report was made.

It was only about 18 hours since the time of the crime.

In the records of the time to solve various cases, 6 hours is already a very fast speed, not to mention a homicide.

Generally speaking, most of these cases solved in a very short period of time are petty theft, and many suspects may not have paid attention to the camera, and they went home after stealing, so they were quickly followed.

In the case of solving a murder case, basically those who can be arrested and brought to justice within 24 hours are worthy of being used as a positive example and a special book.

On the eve of the whiteness press conference on Friday, a sudden accident and a murder case at the speed of light were solved, which gave Meng Fanqi's technology a practical application case.

And won the favor and support of Yanjing Changping District.

On the Australian side, Meng Fanqi, who had just had dinner with the Google foursome, walked out of the door of the restaurant and received a WeChat message from Wang Kai.