Yep, I can't remember where I read that theory but it doesn't look like it fits.
Does anyone know why Crystal's kids had to be checked on when they were safe and sound at their grandparent's house?
They probably didn't need checking on. Mangum probably said something or other about needing to get back to her kids as a means of convincing them to let her go rather than committing her. Women like Mangum will often use their kids as an excuse to be let go, and sometimes it works.