A newspaper ran this headline today:
Police crack down on IAC protesters.
Isn't the following more appropriate?
Police cracks down on IAC protesters.
closed as general reference by FumbleFingers, JLG, Gnawme, Bravo, Will Hunting Aug 27 '12 at 6:52
This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information. If this question can be reworded to fit the rules in the help center, please edit the question.
Unlike (FF's) government which can be treated as singular or plural, police is treated as plural.