Facial recognition system is not a well-developed technology but it might be a direction we can work on in the future. The concept is building a facial system which is a database center recorded peoples’ facial features. It can connect to facebook and make it not only a social network platform but also a facial pictures backlog. Platforms like facebook are abundant of pictures because people upload their daily pictures frequently and we can get resources from it. The next step is connecting to the monitors on the street and to every store where with a facial recognition
device. Once people walk on the street or enter one store, their face would be scanned, recognized and recorded. Information will be transmitted to the database center. The system has to be connected to police department for sure.
The advantage is we can track when and where people show up. If someone is detained, we can search the database center and find out where is the last missing spot that person show up. It might not be a precise location but at least we can narrow down the searching area and provide with help immediately.
It is not impossible but there are too many limits so far. We can not achieve it in low-tech situations. Even in modern and developed cities, there are many blind spots where we can not access to. There is a room we can improve and develop anyway.