No, a terrible position to be in is to be a child kidnapped and/or killed on a random day at school. Another terrible position to be in is to be the parent of a missing or murdered child as the last family member to see him clams up and refuses to help the investigation. Terri is alive and living in her parents' basement and is allowed to make choices. To know that the stepparent could have information that can lead to the recovery of the child, or the child's body - but is choosing not to share it because even though they're not a trained professional, they've arbitrarily decided that they've given enough information and now their own legal safety comes before the need to find the child. Terri's not in a terrible position - she's sitting pretty.
If she's innocent, then she doesn't know which piece of info, which memory, which small snippet of info could lead to finding the missing child. It doesn't have to be the "last minutes" - it could have been a clue from weeks before, something she didn't recall in the heat of the moment that comes back to her. It could have been questions about a friend, family member, janitor at the gym - how would Terri know where the investigation would lead and which new questions would become important? She clams up knowing that (if innocent) she would be the most valuable witness.
Just like countless parents of missing children before her have given their all to find their missing child, enduring questioning and disbelief and accusations - why? because (as they've said and written about at length) they believe finding the child is more important than their own feelings of anger or offense at having their story questioned.
But in any case, how do you know that she told all she knew? The police - trained professionals - certainly weren't done exploring investigative questions with her. Do you know more about that day, Terri's thoughts and actions, and the police investigation than Terri and the investigators do? Clearly not, and so you have no way of knowing what proportion of what "she knew" she has told investigators.
While it is your opinion Terri did not tell all she knew, she cooperated for weeks after Kyron disappeared. I think it would be impossible for an innocent person to help police find a missing child beyond telling what they know. There is no logic in the premise she must know more and that's why she lawyered up. Kyron's parents have cooperated and the child is still missing.
JMO
PORTLAND, Ore. - Terri Horman, the stepmother of missing 7-year-old Kyron Horman, has been fully cooperating with law enforcement, according to Multnomah County Sheriff Dan Staton during a news conference Friday.
http://www.katu.com/news/local/97705124.html