https://arstechnica.com/tech-policy/2018/05/police-use-of-amazons-face-recognition-service-draws-privacy-warnings/

Amazon is actively courting law-enforcement agencies to use a cloud-based facial-recognition service that can identify people in real time, the American Civil Liberties Union reported Tuesday, citing the documents obtained from two US departments.

The service, which Amazon markets under the name Rekognition, can recognize as many as 100 people in a single image and can compare images against databases containing tens of millions of faces. Company executives describe deployment by law enforcement agencies as common use case.