"A member of the police force." (CD)
See also: https://dictionary.cambridge.org/us/dictionary/english/police-officer
The graph displays the other subjects mentioned on the same pages as the subject "Law Enforcement--Police". If the same subject occurs on a page with "Law Enforcement--Police" more than once, it appears closer to "Law Enforcement--Police" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.