Obvious not the meter-reader. Time frames don’t fit.
Certainly not the grandmother, her phone call to the police once she knew Caley was missing was compelling, not to mention her lying to protect, now, Casey from the death penality. The grandmother was a loving grandmother, which by the way Casey was jealous of and spoke of this to her friends.
The mother, Casey, was abusive to her child..and not uncommon that deaths occur for that. I have no doubts...reasonable or otherwise.
But we shall all see. IMO Casey will never own up to any part of what she is or has done...not in her twisted nature.
If (forgive me) the child had not decomposed before the duct tape was applied, how is it possible that there is no DNA on the sticky side of the tape?
It is not - put duct tape on your arm, rip it off, it will be covered with your DNA.
Even more so, if you were a rotting corpse.
So, who applied it, and when?