Because unless they were involved in the murder, there is no way for them to have the cold hard facts.
As I stated, I worked with one of the individuals involved in this scenario and I saw the tears flow when DD sent out that loyalty email. It was a mess.
DD and her husband omitted pertinent information during the police interviews and as far as I am concerned those are lies of omission.
I don't know if BC did it. I will not determine that until I have heard all of the evidence. I too have read every document that has been released to the public and well as watched every video made available. I also have the benefit of knowing the culture of that group. But, even with all of that, I don't know that he did it anymore than I know that he did not. I can't imagine how you might already know that he did or feel that your espousing his guilt without hearing all of the evidence makes you more objective a commenter than myself.
I believe they are telling the truth as they heard it from NC and each other, but NC has already proven that she was not above telling a fib or being dishonest either. Do you think Mr. Duncan was telling the truth when he said that he never hit on NC or do you think NC lied when she said that he did? One of them lied...which one?