http://www.washingtonpost.com/blogs/the-switch/wp/2017/09/13/what-happens-if-a-cop-forces-you-to-unlock-your-iphone-x-with-your-face/

Imagine you've been detained at customs, waiting to cross the border. Or maybe you've been pulled over for a traffic violation. An officer waves your cellphone at you.

“Look at this. Is this yours?” he asks.