She should have simply said that her son had a legal situation back home and as we find out more about it and it proceeds through the legal process, more will become publicly known.
She made the PTSD a part of her speech and linked it to the incumbents policies toward soldiers. She put that part of it on the table announcing her support and endorsement of Trump.
She opened the door to the questioning.
I will simply remind you, that the topic of conversation was spelled out (Promised) BEFORE the interview happened. That promise was broken and she called them on it. If this topic had been told to her before the interview, I suspect she would have not given the interview, Laure knew this, and she called him on it. Proof is the second interview, where he was nowhere to be found. He was going for SHOCK journalism, and making a name for himself. IMO he failed. And he should have failed.