Or he snapped a picture of her. Of course, those pictures are stored.
In other news, an innocent guy is suing Apple because their facial recognition caused him to be arrested.
Marks of the beast.
By that rationale, our very existence is a "mark of the beast." Our faces, retinas, fingerprints, etc. don't count as a "mark of the beast," in Biblical terms, as far as I can reckon. Would you agree?