Detective
Part of speech: noun
Definition: a police officer who looks for evidence as part of solving a crime; an investigator. a person employed to find information not otherwise available to the public.
Example sentence: I am such a 'True Detective' fan. I was anticipating it each Sunday as it came. I'm kind of a sci-fi fan. I was really hooked on the 'Battlestar Galactica' series. I think I owned every box set of 'Battlestar Galactica.' I also really love 'Bob's Burgers.'
Inspector
Part of speech: noun
Definition: a person employed to inspect somethinga police officer ranking below superintendent
Example sentence: The Inspector General issued six reviews and reports on actions taken based on provisions of the act. In those six reports, the IG found that not one violation of an individual's civil liberties - a total of zero - had taken place since the act was instituted.