I agree.The link doesn't work for me, but I think KA knew her husband was troubled, but he kept her in the dark about his deepest, darkest side.
He married someone who was willing to stand by him, for better or for worse, and he betrayed that loyalty. I suspect that betrayal is what is eating at both of them, whether he is the murderer or not (and I think he is).
jmo
This dang story gets sadder as we head towards the finish line.
Abby and Libby were innocent girls. This self reported selfish man has ruined so many lives by perpetuating the vicious cycle of abuse.