Gannon's sister is old enough to be able to tell investigators about abuse etc. Seems like there wasn't any as there's no arrest for that, or maybe there's no evidence if it was just him and he's not there to tell the tale.
I feel like the more we hear about things in the investigation, the less there is to go on.
What if LS is telling the truth at least that she didn't do anything directly to harm him? The only thing I can come up with then is negligence on one particular day when no one else was around to see it. No pattern of abuse or poor treatment. Just a one-time thing that got out of hand and she panicked. And she's defensive enough about everything that she can't admit to it.
Without hearing of more neighbor footage, we can safely assume that her leaving with him and coming back alone is the last time he was in that house. Never returned, didn't go to a friend's house without her knowing. The neighbor would have seen it on his camera, right? So we at least know she is lying about that one thing??
This is all I can think about lately. I have an 11-year-old daughter and they are just still SO young. Relatively helpless out there in the world alone due to their size and youthfulness, and he seemed smaller (because he was born premature I guess).
MOO she lied about his last known whereabouts. There is almost no other reason for that than foul play.