An interesting theory that I had considered was that she may have been seeing a married man. The last work person to see her at the Golf Tournament dinner was her manager at the station. He left before her and told her he'd see her tomorrow. She was sitting at a table  with other guests. She replied, "bright and early". He said he went to check out a building he owned that had been hit by lightening. He's given interviews and I would imagine the police checked out his alibi. Amy had said Jodi was often late and this was not unusual for her. Yet he said he didn't know this, then later said she did come in late sometimes, so he changed her start time from 3:00 to 4:00. Unless it was a different manager who said this, it  would be an inconsistency in his statements. And Amy seemed to believe Jodi was receiving special treatment. It did make me wonder if she might have been having an affair that she told no one about because he was married, and it would have been a loss of their jobs for both of them. 

Then there's that police chief's wife sending a copy of her diary to the newspaper. There seemed to be something she wanted to be known in that diary. Jodi had said she had relationships that stared fast, and then didn't work out. 

I did wonder about a married man. She was very private about her personal dating life to friends. I  wondered if he was there that night, left early, and someone watching her that was upset she was with him took her in a jealous rage.