I watched the new knives out movie on Netflix.
First 30 minutes were slow moving. Afterwards I thought of a few ways the writers could have avoided that. but it did help lay the ground for the mystery. As I type this I'm wondering if that was an homage or an imitation of early golden age mysteries that they didn't quite pull off.
Anyway it did follow some of the classic rules for murder mysteries. All the suspects and most of the clues were introduced early. Plus it was super twisty and kept me guessing till almost the end.
Oh. and great casting, snappy dialogue, and superb craftsmanship throughout.