I can see why people are mad since it was supposed to be like a mini series, it sounds like basically. Since I didn't know that ahead of time, as the show was progressing, I thought that they might just have one case per season. Now that they said there will definitely be a conclusion at the end of this season, I guess that will be it for the show.
As soon as I saw the scene where that weird guy was changing the kid's bed sheets, I was guessing that he might be the killer. Then when the female detective saw who the e-mail went to, it looked like the guy running for mayor was definitely involved. And I thought it might be the standard scene where he attacks the female detective, and her partner has to rush in to help her. I was glad that they didn't go that route, and went with some swerves during the season.