Customs and Border Protection (CBP) has publicly released an app that Sheriff Offices, police departments, and other local or regional law enforcement can use to scan someone’s face as part of immigration enforcement, 404 Media has learned.

The news follows Immigration and Customs Enforcement’s (ICE) use of another internal Department of Homeland Security (DHS) app called Mobile Fortify that uses facial recognition to nearly instantly bring up someone’s name, date of birth, alien number, and whether they’ve been given an order of deportation. The new local law enforcement-focused app, called Mobile Identify, crystallizes one of the exact criticisms of DHS’s facial recognition app from privacy and surveillance experts: that this sort of powerful technology would trickle down to local enforcement, some of which have a history of making anti-immigrant comments or supporting inhumane treatment of detainees.

Handing “this powerful tech to police is like asking a 16-year old who just failed their drivers exams to pick a dozen classmates to hand car keys to,” Jake Laperruque, deputy director of the Center for Democracy & Technology's Security and Surveillance Project, told 404 Media. “These careless and cavalier uses of facial recognition are going to lead to U.S. citizens and lawful residents being grabbed off the street and placed in ICE detention.”

Immigration and Customs Enforcement (ICE) does not let people decline to be scanned by its new facial recognition app, which the agency uses to verify a person’s identity and their immigration status, according to an internal Department of Homeland Security (DHS) document obtained by 404 Media. The document also says any face photos taken by the app, called Mobile Fortify, will be stored for 15 years, including those of U.S. citizens.

The document provides new details about the technology behind Mobile Fortify, how the data it collects is processed and stored, and DHS’s rationale for using it. On Wednesday 404 Media reported that both ICE and Customs and Border Protection (CBP) are scanning peoples’ faces in the streets to verify citizenship.

“You don’t got no ID?” a Border Patrol agent in a baseball cap, sunglasses, and neck gaiter asks a kid on a bike. The officer and three others had just stopped the two young men on their bikes during the day in what a video documenting the incident says is Chicago. One of the boys is filming the encounter on his phone. He says in the video he was born here, meaning he would be an American citizen.

When the boy says he doesn’t have ID on him, the Border Patrol officer has an alternative. He calls over to one of the other officers, “can you do facial?” The second officer then approaches the boy, gets him to turn around to face the sun, and points his own phone camera directly at him, hovering it over the boy’s face for a couple seconds. The officer then looks at his phone’s screen and asks for the boy to verify his name. The video stops.