Several things convinced me of Darlie's guilt. Years ago and first, it was the metal screen (window) filings found on the kitchen knife that was put back into the butcher block; the fact that the two children were so brutally attacked, but yet the one person who could possibly defend themselves and cause harm to an intruder is left alive; the sink washed of blood and also the blood on the sofa tried to be cleaned; the oh so brave act of picking up the knife and chasing the intruder; the invitation to the press to attend a birthday party at the grave of her two brutally murdered sons; and, the lack of trauma Darlie displayed. There are many more reasons, but these are a few that stand out in my mind.
If anyone here has ever been attacked, has had to defend themselves in fear for their lives, and/or has had a child die, you would know that Darlie's behavior, even her behavior today, is so far off the charts that it points to her guilt. It's difficult to explain this type of trauma to anyone, so unless you have experienced it, I'm not sure one could understand it. With trauma, you experience severe physical and emotional changes in your body and I've seen none of those, not even a hint, in Darlie. As always, all of this is my opinion only.