case closed

Phrase

case closed

1. Expressing finality, that that preceding material is meant as final, not subject to amendation or variation.
   • […]he would no more tell a grunt in uniform what he was really thinking than he'd drop his pants and wag the weasel at a formal diplomatic function.
     Some things were simply not done by professionals. Full stop. Case closed.2007, Ripple Effect, page 13
   • "And I your God say no angel of mine will ever marry a female human being. And that is final!"
     "Positively final?" I asked in a firm, steady voice.
     "Yes! Doubly positively final! Case closed!"2011, Dominick Ricca, "The Salvation of Satan", in Would You Like to Be White? and Other Stories, Xlibris (self-published), page 403 http://books.google.com/books?id=YVr6Rw8UaioC&pg=PA403&dq=case
2. Used other than figuratively or idiomatically: A case is closed; specifically, a police investigation or similar is resolved.
   • The bodies of the deceased were removed from the scene to the Suffolk County medical examiner's office in Hauppauge.[…] As you can see from the report, Nikki Hale was the only one who was impaired. Case closed.2009, Brad Thor, The Apostle, Atria, →ISBN