yes, darrenth, of course a police officer saw it because if s/he hadn't you wouldn't have gone to the police station
All the officer is now doing is telling you that to keep the ID of the person who reported you, as in someone on your friends list, secret
Even the police cannot 'just read' anyone's profile where the settings are set so that non friends can't see it. It doesn't happen that way. They cannot hack FB any more than you or I can so they can view profiles, they were shown it by one of your, and I use the term lightly, friends