I really don't understand what the face of a person has to do with understanding whether something is arson or not. Just as I see no reason why my local grocery

I really don't understand what the face of a person has to do with understanding whether something is arson or not. Just as I see no reason why my local grocery store's security guard needs to be able to look up my face in a database directly. If they need to gather more data, then they can ask law enforcement to identify any relevant people and gather relevant information (potentially bringing witnesses in for questioning if there's a legitimate need), then do their investigation based on the evidence to analyze the circumstances of the fire.