Facial Recognition is a great step to ensure privacy and security. It is considered to be an essential element when it comes to investigation. Read more at nytimes.com
The New York Police Department seems to be using the technology of facial recognition. They firstly search for a useful video in any investigation and provide it to the Facial Identification section.
A template of the face is made and accordingly the software provides possible matches. Once it gets selected a further investigation is conducted through examination of social media and other such images.
Facial recognition has helped in solving many such crime cases.