This was one of the best episodes of the show. They really wanted us to think that it was the father. And with his alcohol problem, blackouts and alter ego it wasn't hard to see him as the bad guy.
So what a twist it was when it turned out the daughter did it all. I think most us realized the daughter Sarah was bad when she and JJ had just entered the house. And then I kept thinking of her poor father; he's been a suspect for a murders he had never done and everyone thought he was the bad guy.
I so love how JJ switched from talking to the team to talking to her "family" during her phone call. And how cool and composed she was, yet stern when she had a gun pointed at her. JJ is a fighter!
Let's hope the next episode is just as good as this one!