Man,
Re your comment below:
Deputy Inspectors are civilians who supervise certain sections of the Police Dept and Police Surgeons and I think Police Chaplains might be issued a Gold Shield.
Welcome aboard, and I hate to make our first interaction here a correction, but deputy inspectors are
not civilian employees. They are executive level police officers, ranking above captain, and below a full inspector. Their insignia of rank is an oak leaf (I don't know, off-hand, whether it's gold, like an Army, Marine, or Air Force Major, or a Naval or Coast Guard lieutenant commander, or silver, like a lieutenant colonel or full commander, but it is an oak leaf; a full inspector wears the eagle of a full colonel or a Naval or Coast Guard captain).
What
is true is that deputy inspectors (and, indeed, every police rank above captain) is an appointive rank,made by the Police Commissioner, rather than one gained by competitive civil service examinations.
It's also true that the commissioner and his/her deputy and assistant commissioners are, technically, civilians, though they are entitled to carry guns and to make arrests, and they are issued badges (or "shields" as they are invariably referred to by members of the NYPD).