Police

Can anyone tell me different police officer rankings/titles and what they each specifically do? Specifically, who's in charge of the police?

Depends which country you're in.

General Police Heirarchies and Police Forces around the World ought to help you out.

I think the Arcade King about settled it.

Sometimes it depends on the station, your best bet is to google it with the name of wherever you're setting the story.

A lot of times an increse in rank only means more salary. Its not until they hit detective that they're actually off the street, and in plain clothes.