What frustrated me was the lack of basic follow-ups to the most obvious bleeding questions (some of which were addressed right at the end). The odd editing and time stamp on the video, for instance - it was released by the police and the original video was fine according to the detectives, so it should have been trivial to ask who edited it and why. The detectives’ response at the end was something like “Dunno, lol, wasn’t our department.”
And the business with the lid to the water tank... As soon as the first internet sleuth latched onto the idea that she couldn’t have closed it from the inside and thus was 100% murdered, my immediate response was that the maintenance guy who found her very clearly said that the lid was open when he found her and he closed it before reporting it. The resulting theories were all clearly bollocks because of that detail, which was ignored right until the end where it’s revealed the police cocked up their statement to the press.
If anything, it’s a lesson in the importance of clear communication in police work, particularly in a bizarre case like this.