It is my opinion that Marc Klaas is not even considering BD's guilt or innocence. I believe he looks at BD as simply (and tragically) a mother whose daughter is missing. His main concern is Hailey and bringing Hailey home in any way possible. At this point in time, he is willing to give BD help, without judgement, for the sake of her daughter-- and this is all he cares about. He is willing to look beyond any possible dependancy or whatever that BD has for SA in order to return HD home to her family. Whomever is ultimately found responsible and whatever the outcome of this tragic case, I will admire Marc for being there for CD, BD and DD when few other people were and for getting the searches properly organized.
And that's how it should be instead of everything becoming a circus on national TV like happened with a couple of other cases. After it is supposed to be about Haylie, and not a bunch of gossip except for the basic facts that are known. People discussing online is one thing and not seen by millions like these shows that are TV.