People who live at the bottom of society are often the ones who are most overlooked.

It is possible that you have such a sanitation worker on your way to work, every day on your way to work, you will see him every day, wearing a yellow reflective vest, riding a yellow electric tricycle with a bucket with a municipal environmental protection logo, or picking up garbage on the ground, or parking the tricycle on the side of the road and walking to the middle of the road to pick up the cigarette butts that have been discarded randomly.

But even if you see him every day, you never remember what he looks like.

Like the sanitation workers, the same is true for the cleaners in the community, who live at the bottom of the society, and are often willing to do this kind of work, often some of the old, weak, sick and disabled, people avoid such people, let alone remember their appearance.

He also started his profession as a cleaner in the Eton Manor community in Sancao City only two months ago.

He observed for a long time, he wanted to be able to stay in this community for a long time at night, of course, it can't be a resident, and he can't drive in and out of the community, because in that way, the video surveillance in and out of the community during that time period will remember the license plate information of the vehicle, and he can't use a fake license vehicle, because there is a lot of uncertainty in that kind of fake license vehicle.

If the traffic police had found out on the day the plan was implemented, all efforts would have been in vain.

On the day the plan was implemented, he couldn't just go in and out of the community on that day and at that time, which would also arouse suspicion, even if he was wearing a human skin mask that day, then he would become a suspicion.

So he needs to be a person who doesn't get noticed, who can go in and out of the neighborhood every night, or a profession.

He knows the Sancao City Police Department, and also knows the group of people in the city criminal police team, and he has investigated the cases solved by the Sancao City criminal police team in recent years, and he knows that a group of police elites headed by Qiao Chuan have their own methods for solving criminal cases.

Since graduating from the Provincial Police Academy, Qiao Chuan has participated in and organized the investigation of many major and important cases, and even some cases that have been listed as provincial key inspectors have also invited Qiao Chuan to participate.

He may know more about Qiao Chuan than Qiao Chuan knows about Qiao Chuan himself. For such a person, he repeatedly scrutinized it hundreds of times, and finally came to the conclusion that the advantages outweigh the disadvantages.

He needs someone like Qiao Chuan to solve his own problems.

He understands his plan, he needs to wait for the opportunity, but he knows that before the time comes, he must be fully prepared, just like solving a problem, the answer to the solution is based on the various conditions in the problem, and what he has to do is to create these conditions without any flaws.

Before applying for the job as a cleaner in this community, he went to the security office of the community and asked for a previous video on the grounds that his battery car was lost, and then he learned that the video of this community is stored for 15 days.

The security guard of the community was also annoyed by the registration over and over again every day, so he simply opened the access control on the sidewalk at the door, which also allowed him to enter and exit the community at will during this period of time.

But even with the access control on the sidewalks in the community, he still has a way to observe the scene in the community.

He observed that there were two types of cleaners in the community: one was the corridor cleaner, who worked the same hours as most of the staff, starting when the residents left, from 8 a.m. to 6 p.m.

Another kind of cleaner is the road cleaner, the working time is from seven o'clock in the evening to after eleven o'clock in the evening, the cleaning of the community road is roughly divided into four areas, each of which is responsible for one person, each person also has an electric tricycle with a bucket, and they go home after cleaning the night, but because the work time is relatively late, the salary is also low, the personnel turnover is very large, and there are two groups of people in the time he observes.

In order not to have any problems in the surveillance, he had to lock the implementation of the plan to fifteen days after he applied for the cleaner in the community, so that the person before he became a cleaner would not appear in the surveillance video of the community.

He thought a lot before applying for the job of a cleaner in this community, and he went to other provinces to customize a human skin mask and a pair of human leather gloves, which cost him a lot of money, but when he put them on, he felt that the cost was worth it, and he was amazed that the current technology was so developed, and everyone in the mirror had completely become another old man.

Then he studied the face recognition system of the police station, learned about the elements of recognition in the face recognition system, and he visited many villages in the city, and finally found a left-behind old man, according to the face recognition system, he wore a human skin mask and the old man is more than 80% similar.

In his capacity as the Municipal Poverty Alleviation Office, he obtained the ID card information of the old man on the pretext of secretly checking the information of the five guarantee households. Then he went to another province to apply for a fake identity card.

Whenever he has free time, he imitates the old man walking, imitating the old man talking and coughing. Just when he felt that all the preparations were done, he went to the property office of this community to apply for a job as a cleaner.

But when he signed the labor contract, he realized that several of the jobs he had done before had been done in vain.

The property office did not let him register his ID card information, but just asked him to sign the labor and it was over.

But, although much of his work was done in vain, he was happy in his heart.

The fewer traces left behind, the less likely he is to be spotted.