Definition of "police investigation" []

• The investigation of criminal activities (noun)

WordNet. Princeton University. 2010.

• "David Cameron and the attorney general, Dominic Grieve, will come under sustained pressure to hold a public inquiry into phone hacking at the News of the World and the conduct of the police investigation into the practice over the past five years."
• "Pressed in the Commons by Labour's deputy leader, Harriet Harman, to accede to a public inquiry, Clegg said: "If there are wider issues that need to be looked at once the police investigation is complete, of course we can return to them.""
• "I remember the police investigation and the arrest of the boys and Claire De Haven becoming outraged and holding fund-raisers."