Grim humor has saved me from insanity at times, especially when raising children.
Sciavo and people like him, peterson, simpson, all of them are just so repellent to me. I do think this man may be worse than OJ and Peterson if that is possible. At least they sort of killed in a rage, or OJ did. This guy could walk away but somehow he just wants to kill her for his convenience. I don't think he is afraid she will get so much better that she could pin this on him. I think he wanted all the money and she just lived on and on and on and he wants what is left.
Convenience?
Maybe it isn't about convenience, but about evidence of criminal activity, in Terri's person or testimony.