I have lurked here for awhile been following this since the beginning here.
My opinion from watching the interview of LS is that if she did harm Gannon purposely, she has to be a very deeply disturbed individual to be able to gloat about the future apologies she will receive, all the while knowing Gannon is not coming back.
I knew someone who reminded me very much of the way LS acts in the interview video and now, knowing her story doesn't add up or she is flat out lying, i am very very scared for Gannon. Terrified, really.
I hope i am wrong because if not, the truth of what happened could be much more bizarre and unexplainable than we even imagine. This is all my own opinion. I don't really have a theory about what happened, we all just know the stepmom isn't telling the whole story.