US police officers are instructed on how to keep unlocking active via the Face ID on iPhone X, iPhone XS, and iPhone XR. In this way, they can force the release of the suspect, simply by using Face ID technology and face.
In the United States, it is illegal to force a suspect to enter his unlock code on his smartphone. The same thing does not apply to the use of Face ID, which can be used to unlock an iPhone even without the consent of the person investigated. Precisely for this reason, the US police is instructed on how to keep active the ability to unlock an iPhone through the Face ID, before this requires the mandatory entry of the code.
We know in fact that the iPhone X, iPhone XS, and iPhone XR can try to unlock it through our face five times. After these five attempts, we are automatically asked to enter the code, just like when the iPhone was first started.
Knowing these technical data, the US police avoid turning their faces to the smartphone, so as not to waste unnecessary attempts to unlock. In this way, by pointing the smartphone against the suspect, they can gain access to the data hidden within it.