I. Executive Summary

There is a knock on your door. It's the police. There was a robbery in your neighborhood. They have a suspect in custody and an eyewitness. But they need your help: Will you come down to the station to stand in the line-up?

Most people would probably answer "no." This summer, the Government Accountability Office revealed that close to 64 million Americans do not have a say in the matter: 16 states let the FBI use face recognition technology to compare the faces of suspected criminals to their driver's license and ID photos, creating a virtual line-up of their state residents. In this line-up, it's not a human that points to the suspect—it's an algorithm.