What I've written is not where it belongs.
That and I might drop the coya element for now and concentrate on writing a different-but-the-same detective story [?]
I'm stuck between slightly flippant tone or a full-out omniscient author.
The latter lets me puff up the dramatic psycho-something style
The former I might have slightly more wiggle-room and set an element of dS style slightly-suspend-your-belief which could be lighter and funnier (surprise!) but may not fit a double-murder [hey, I upgraded!] e.g.
https://buzzylittleb.livejournal.com/809522.html Currently: I have a monster migraine-thing and going to bed
ETA: Staying with option 1: slightly flippant and potential to subsequently coya.
I just need to be consciously unaware of possible decision trees
[since removing some of the really annoying trees from the earlier section - which just made the whole thing much too complicated and also doesn't include the almost but not quite give-away element]