I had not seen this before, sorry if it's already been posted. This is the most verbal I have ever seen her ...
http://www.reporternews.com/news/2011/jan/12/raw-video-mother-billie-jean-dunn-speaks-out-about/
I remember watching the edited version of this, whatever day it was released. This "raw" footage shows how BD has been (at least in this case) a victim of editing. People have gotten on her for saying "this house", while in this interview, she says "home". She speaks of loving HD, wanting her home, and all of the things she has been accused of not saying. But she said it. It was edited out.
As for the discussion about introverts (very well described), I too am that way, but didn't know that was my label

Very controlled during crisis ... "do do do" ... worry about me later (sleep, food, etc). After a crisis/sad/tragic event, after everyone has gone, when it's quiet: collapse, uncontrollable crying, feeling very beat up. But no one sees it. And I don't tell.
So perhaps that is why I've always been on the fence about Billie, but I'd say that I'm more of a front row fencer (want to believe her so badly, but am waiting for more facts, but want to defend her). But I can watch her talking, I can see the defense mechanisms that she is using to control her emotions. It's hard to describe, but *I* see it, because I do similar things. For example, when her voice begins to break a little (which it does a bit when talking about HD), I see her deep breath, glances around ... to me, that only means she is gathering her composure (not concocting a story, remembering lies). Heck, I even have conversations with myself while gathering composure ("oh no you don't, STOP IT" etc).
So thank you gals for bringing up the introvert conversation. I agree, it is very relevant and important in understanding BD.