I think they will actively go with the Accidental Death defense. We have had a few clues to that as recent heads up. LKB saying Casey was obviously lying about the nanny was one big heads up. Then today on In Session, C Mason says outright it was a 'tragic accident.' That clearly implies, imo, that the DT is going to go with the Accidental Death scenario. They will try and make Casey the victim of over zealous prosecutors, unfair police investigations, and abusive parents. imoo
Then all they have to do is find 12 people who will believe them.
Remember,this is JB and CM we're talking about, and a defendant who dare not testify.... hmmm