Makes me wonder why no mainstream Android fork has bothered implementing a duress fingerprint feature. Maybe this is an opportunity for Linux phones.

Graphene has a duress PIN, but I'd like to see a feature where using the wrong fingerprint both locks the phone and opens into a fake, nondescript home screen to deceive the authorities.

The only other protection for anyone using biometrics at the moment is to reboot the device, which will always default to PIN unlock, but not so easy to do when caught by the authorities unawares.