Interview: Apple’s Craig Federighi about Face ID
> So, if you were in a case where the thief was asking to hand over your phone – you can just reach into your pocket, squeeze it, and it will disable Face ID. It will do the same thing on iPhone 8 to disable Touch ID.I imagine that authorities will catch on pretty quickly: "keep your hands up and away from your pockets while we retrieve your device." It would have to happen before any kind of duress.