hold on
spoilers:
there has to be more than me out there that narrowed down the ending halfway through. not the ending exactly but at least how the connection was made. it was immediate pretty much as soon as alex hung up the girl's picture on the wall to the first scene robert pulls his own picture out of his jacket. after the first mention of the hospital i predicted she'd probably let herself in while they were out or him taking her up to the bedroom where she'd see it. i didn't expect such an anticlimactic ending but when you get the idea pretty early on it's surprising to read that it was surprising for anyone else.
was it also not annoying that coming from a small town where a murder would be considered a large deal that the wife seemingly made no connection of alex's confession at her house? right?