case closed

Case closed.

1. The above is meant as final, not subject to amendation or variation.
   • 2007, Ripple Effect, page 13 :

     […] 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.

   • 2011, Dominick Ricca, "The Salvation of Satan", in Would You Like to Be White? and Other Stories, Xlibris (self-published), →ISBN, page 403 :

     "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!"

2. Used other than with a figurative or idiomatic meaning: A case is closed; specifically, a police investigation or similar is resolved.
   • 2009, Brad Thor, The Apostle, Atria, →ISBN :

     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.