There has been something I can't put my finger on with the TS. She seems oddly confident that Gannon is alive and that she will be proven right or innocent or whatever. She stands by the scenario that he ran away or was abducted, yet statistics show that the majority of children who are kidnapped are found deceased aren't they? So even if she has herself convinced he ran away, the outcome would be expected to be poor.
Which leads me to this.
We may have a Sherri Papini type situation (now I am not saying that she was kidnapped or not) but, she seemingly disappeared and conveniently re-appeared the morning of the vigil some weeks later.
I would have to think that if TS was the last one to see Gannon alive - as she admits - and any evidence of death was found by LE, then surely she would be named a person of interest purely from a factual point of view.
I appreciate that TS is a sociopath and that she may be confident in saying he is alive because he was the last time she saw him, but I strongly believe she has him stashed somewhere. There is zero sense of urgency in her and I do think that LE may be waiting for her to lead them to where he is and that they don't necessarily believe he has passed.
Having followed the Heidi Brouchard case, alot of people were 100% sure that Shane was involved. Yet we now know that from early on in the investigation Shane and LE were aware of what was happening, and Shane's interviews spoke directly to the woman responsible and in hindsight illustrated what had taken place. Ex: Feed the baby, look after the baby.
Maybe there are some clues in what Gannon's bio parents are saying more than what TS is saying.