I am the opposite - I previously felt JI was involved but now I am thinking he wasn't. I think he is overwhelmed and suspicious himself of DB, but has to go to bat for her in the media. I could easily change my mind about him though, still processing all the pieces to this puzzle.
I don't think he really knows what happened..... I think DB does though...
I suspect in a couple of days LE will ask her to come back down to the Police Station and answer some more questions.